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/Problem11_label57_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:16:38,247 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:16:38,249 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:16:38,261 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:16:38,262 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:16:38,264 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:16:38,267 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:16:38,269 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:16:38,272 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:16:38,276 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:16:38,278 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:16:38,278 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:16:38,279 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:16:38,280 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:16:38,281 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:16:38,282 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:16:38,283 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:16:38,285 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:16:38,287 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:16:38,288 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:16:38,290 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:16:38,291 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:16:38,293 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 12:16:38,293 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 12:16:38,294 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 12:16:38,295 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 12:16:38,296 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 12:16:38,297 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 12:16:38,297 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 12:16:38,299 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 12:16:38,299 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 12:16:38,300 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 12:16:38,300 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:16:38,300 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:16:38,301 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:16:38,302 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:16:38,302 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-08-07 12:16:38,318 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:16:38,318 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:16:38,319 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:16:38,319 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:16:38,319 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:16:38,320 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:16:38,320 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:16:38,320 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:16:38,320 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:16:38,320 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:16:38,321 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:16:38,321 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:16:38,322 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:16:38,322 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:16:38,322 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:16:38,322 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:16:38,322 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:16:38,322 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:16:38,323 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:16:38,323 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:16:38,323 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:16:38,323 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:16:38,323 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:16:38,324 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:16:38,324 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:16:38,324 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:16:38,324 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:16:38,324 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:16:38,325 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:16:38,325 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:16:38,325 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:16:38,325 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:16:38,325 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:16:38,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:16:38,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:16:38,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:16:38,418 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:16:38,419 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:16:38,420 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label57_true-unreach-call.c [2018-08-07 12:16:38,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d3a8d7f7/458df608e70b498a891fb772c325f622/FLAGc1c0594d5 [2018-08-07 12:16:39,142 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:16:39,143 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label57_true-unreach-call.c [2018-08-07 12:16:39,166 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d3a8d7f7/458df608e70b498a891fb772c325f622/FLAGc1c0594d5 [2018-08-07 12:16:39,189 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d3a8d7f7/458df608e70b498a891fb772c325f622 [2018-08-07 12:16:39,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:16:39,204 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:16:39,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:16:39,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:16:39,213 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:16:39,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:16:39" (1/1) ... [2018-08-07 12:16:39,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a60f44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:39, skipping insertion in model container [2018-08-07 12:16:39,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:16:39" (1/1) ... [2018-08-07 12:16:39,435 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:16:39,814 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:16:39,831 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:16:40,051 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:16:40,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40 WrapperNode [2018-08-07 12:16:40,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:16:40,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:16:40,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:16:40,147 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:16:40,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:16:40,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:16:40,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:16:40,315 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:16:40,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... [2018-08-07 12:16:40,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:16:40,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:16:40,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:16:40,729 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:16:40,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:16:40,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:16:40,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:16:40,806 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:16:40,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:16:40,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:16:40,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:16:40,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:16:40,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:16:46,319 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:16:46,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:16:46 BoogieIcfgContainer [2018-08-07 12:16:46,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:16:46,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:16:46,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:16:46,325 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:16:46,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:16:39" (1/3) ... [2018-08-07 12:16:46,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c1faef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:16:46, skipping insertion in model container [2018-08-07 12:16:46,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:16:40" (2/3) ... [2018-08-07 12:16:46,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c1faef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:16:46, skipping insertion in model container [2018-08-07 12:16:46,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:16:46" (3/3) ... [2018-08-07 12:16:46,329 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label57_true-unreach-call.c [2018-08-07 12:16:46,340 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:16:46,348 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:16:46,398 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:16:46,399 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:16:46,401 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:16:46,401 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:16:46,401 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:16:46,401 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:16:46,401 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:16:46,402 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:16:46,402 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:16:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-08-07 12:16:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-08-07 12:16:46,440 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:46,441 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] [2018-08-07 12:16:46,443 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2140032137, now seen corresponding path program 1 times [2018-08-07 12:16:46,451 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:46,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:46,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:46,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:46,509 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:47,014 WARN L170 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:16:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:47,120 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:16:47,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:16:47,121 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:47,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:16:47,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:16:47,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:16:47,145 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-08-07 12:16:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:49,526 INFO L93 Difference]: Finished difference Result 790 states and 1382 transitions. [2018-08-07 12:16:49,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:16:49,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-08-07 12:16:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:49,549 INFO L225 Difference]: With dead ends: 790 [2018-08-07 12:16:49,550 INFO L226 Difference]: Without dead ends: 495 [2018-08-07 12:16:49,558 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:16:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-08-07 12:16:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 488. [2018-08-07 12:16:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-08-07 12:16:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 849 transitions. [2018-08-07 12:16:49,651 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 849 transitions. Word has length 53 [2018-08-07 12:16:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:49,652 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 849 transitions. [2018-08-07 12:16:49,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:16:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 849 transitions. [2018-08-07 12:16:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-08-07 12:16:49,660 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:49,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:16:49,661 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:49,662 INFO L82 PathProgramCache]: Analyzing trace with hash -98981880, now seen corresponding path program 1 times [2018-08-07 12:16:49,662 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:49,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:49,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:49,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:49,664 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:49,947 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:16:49,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-08-07 12:16:49,948 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:49,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:16:49,950 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:16:49,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-08-07 12:16:49,951 INFO L87 Difference]: Start difference. First operand 488 states and 849 transitions. Second operand 5 states. [2018-08-07 12:16:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:55,436 INFO L93 Difference]: Finished difference Result 1731 states and 3162 transitions. [2018-08-07 12:16:55,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:16:55,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2018-08-07 12:16:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:55,451 INFO L225 Difference]: With dead ends: 1731 [2018-08-07 12:16:55,451 INFO L226 Difference]: Without dead ends: 1249 [2018-08-07 12:16:55,458 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:16:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2018-08-07 12:16:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1032. [2018-08-07 12:16:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-08-07 12:16:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1658 transitions. [2018-08-07 12:16:55,531 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1658 transitions. Word has length 129 [2018-08-07 12:16:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:55,531 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 1658 transitions. [2018-08-07 12:16:55,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:16:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1658 transitions. [2018-08-07 12:16:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-08-07 12:16:55,536 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:55,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:16:55,536 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1825903031, now seen corresponding path program 1 times [2018-08-07 12:16:55,537 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:55,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:55,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:55,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:55,538 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:55,727 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:16:55,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:16:55,728 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:55,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:16:55,729 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:16:55,729 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:16:55,729 INFO L87 Difference]: Start difference. First operand 1032 states and 1658 transitions. Second operand 6 states. [2018-08-07 12:17:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:01,606 INFO L93 Difference]: Finished difference Result 3996 states and 6919 transitions. [2018-08-07 12:17:01,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 12:17:01,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-08-07 12:17:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:01,634 INFO L225 Difference]: With dead ends: 3996 [2018-08-07 12:17:01,634 INFO L226 Difference]: Without dead ends: 2970 [2018-08-07 12:17:01,650 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-08-07 12:17:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2018-08-07 12:17:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2909. [2018-08-07 12:17:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2909 states. [2018-08-07 12:17:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4228 transitions. [2018-08-07 12:17:01,777 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4228 transitions. Word has length 140 [2018-08-07 12:17:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:01,777 INFO L480 AbstractCegarLoop]: Abstraction has 2909 states and 4228 transitions. [2018-08-07 12:17:01,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:17:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4228 transitions. [2018-08-07 12:17:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-08-07 12:17:01,785 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:01,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:17:01,787 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash 549270797, now seen corresponding path program 1 times [2018-08-07 12:17:01,787 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:01,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:01,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:01,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:01,789 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:02,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:02,586 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:02,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:02,595 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:02,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:02,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:03,029 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:17:03,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-08-07 12:17:03,030 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:17:03,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:17:03,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:17:03,032 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:17:03,032 INFO L87 Difference]: Start difference. First operand 2909 states and 4228 transitions. Second operand 3 states. [2018-08-07 12:17:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:06,540 INFO L93 Difference]: Finished difference Result 6626 states and 10031 transitions. [2018-08-07 12:17:06,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:17:06,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2018-08-07 12:17:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:06,564 INFO L225 Difference]: With dead ends: 6626 [2018-08-07 12:17:06,564 INFO L226 Difference]: Without dead ends: 3723 [2018-08-07 12:17:06,583 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 370 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:17:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2018-08-07 12:17:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3525. [2018-08-07 12:17:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3525 states. [2018-08-07 12:17:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5147 transitions. [2018-08-07 12:17:06,698 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5147 transitions. Word has length 185 [2018-08-07 12:17:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:06,698 INFO L480 AbstractCegarLoop]: Abstraction has 3525 states and 5147 transitions. [2018-08-07 12:17:06,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:17:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5147 transitions. [2018-08-07 12:17:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-08-07 12:17:06,706 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:06,707 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, 2, 2, 2, 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] [2018-08-07 12:17:06,707 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -398392118, now seen corresponding path program 1 times [2018-08-07 12:17:06,707 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:06,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:06,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:06,709 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:07,025 WARN L170 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:17:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 92 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:17:07,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:07,279 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:07,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:07,288 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:07,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-08-07 12:17:07,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:07,917 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 12:17:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 92 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:17:08,208 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:17:08,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-08-07 12:17:08,208 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:17:08,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:17:08,209 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:17:08,209 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:17:08,211 INFO L87 Difference]: Start difference. First operand 3525 states and 5147 transitions. Second operand 5 states. [2018-08-07 12:17:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:12,595 INFO L93 Difference]: Finished difference Result 11370 states and 17541 transitions. [2018-08-07 12:17:12,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:17:12,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2018-08-07 12:17:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:12,644 INFO L225 Difference]: With dead ends: 11370 [2018-08-07 12:17:12,644 INFO L226 Difference]: Without dead ends: 7851 [2018-08-07 12:17:12,673 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 415 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:17:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2018-08-07 12:17:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 7741. [2018-08-07 12:17:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7741 states. [2018-08-07 12:17:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 11195 transitions. [2018-08-07 12:17:12,965 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 11195 transitions. Word has length 210 [2018-08-07 12:17:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:12,966 INFO L480 AbstractCegarLoop]: Abstraction has 7741 states and 11195 transitions. [2018-08-07 12:17:12,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:17:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 11195 transitions. [2018-08-07 12:17:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-08-07 12:17:12,978 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:12,979 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, 2, 2, 2, 2, 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] [2018-08-07 12:17:12,979 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1720277811, now seen corresponding path program 1 times [2018-08-07 12:17:12,979 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:12,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:12,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:12,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:12,981 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:13,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:13,242 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:13,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:13,250 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:13,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:17:13,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:17:13,670 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:17:13,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-08-07 12:17:13,673 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:17:13,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:17:13,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:17:13,674 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:17:13,674 INFO L87 Difference]: Start difference. First operand 7741 states and 11195 transitions. Second operand 3 states. [2018-08-07 12:17:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:15,872 INFO L93 Difference]: Finished difference Result 20460 states and 31279 transitions. [2018-08-07 12:17:15,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:17:15,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2018-08-07 12:17:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:15,973 INFO L225 Difference]: With dead ends: 20460 [2018-08-07 12:17:15,973 INFO L226 Difference]: Without dead ends: 12725 [2018-08-07 12:17:16,036 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 420 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:17:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12725 states. [2018-08-07 12:17:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12725 to 12531. [2018-08-07 12:17:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12531 states. [2018-08-07 12:17:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12531 states to 12531 states and 17861 transitions. [2018-08-07 12:17:16,450 INFO L78 Accepts]: Start accepts. Automaton has 12531 states and 17861 transitions. Word has length 211 [2018-08-07 12:17:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:16,451 INFO L480 AbstractCegarLoop]: Abstraction has 12531 states and 17861 transitions. [2018-08-07 12:17:16,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:17:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12531 states and 17861 transitions. [2018-08-07 12:17:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-08-07 12:17:16,473 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:16,473 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, 2, 2, 2, 2, 2, 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] [2018-08-07 12:17:16,474 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash -511735626, now seen corresponding path program 1 times [2018-08-07 12:17:16,474 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:16,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:16,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:16,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:16,475 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-08-07 12:17:16,729 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:17:16,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:17:16,729 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:17:16,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:17:16,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:17:16,730 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:17:16,731 INFO L87 Difference]: Start difference. First operand 12531 states and 17861 transitions. Second operand 3 states. [2018-08-07 12:17:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:18,929 INFO L93 Difference]: Finished difference Result 26883 states and 40223 transitions. [2018-08-07 12:17:18,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:17:18,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2018-08-07 12:17:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:18,996 INFO L225 Difference]: With dead ends: 26883 [2018-08-07 12:17:18,996 INFO L226 Difference]: Without dead ends: 14358 [2018-08-07 12:17:19,066 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 12:17:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14358 states. [2018-08-07 12:17:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14358 to 14356. [2018-08-07 12:17:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14356 states. [2018-08-07 12:17:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14356 states to 14356 states and 20497 transitions. [2018-08-07 12:17:19,440 INFO L78 Accepts]: Start accepts. Automaton has 14356 states and 20497 transitions. Word has length 216 [2018-08-07 12:17:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:19,441 INFO L480 AbstractCegarLoop]: Abstraction has 14356 states and 20497 transitions. [2018-08-07 12:17:19,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:17:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 14356 states and 20497 transitions. [2018-08-07 12:17:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-08-07 12:17:19,481 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:19,481 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, 2, 2, 2, 2, 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 12:17:19,482 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1100672111, now seen corresponding path program 1 times [2018-08-07 12:17:19,482 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:19,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:19,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:19,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:19,484 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:20,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:20,167 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:20,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:20,181 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:20,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:21,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:21,807 WARN L170 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2018-08-07 12:17:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:22,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:22,297 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:17:22,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:22,314 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:22,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 93 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:22,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:23,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:17:23,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8, 7, 5] total 19 [2018-08-07 12:17:23,213 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:17:23,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-08-07 12:17:23,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-08-07 12:17:23,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2018-08-07 12:17:23,215 INFO L87 Difference]: Start difference. First operand 14356 states and 20497 transitions. Second operand 11 states. [2018-08-07 12:17:23,485 WARN L170 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 14 [2018-08-07 12:17:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:31,456 INFO L93 Difference]: Finished difference Result 33200 states and 51367 transitions. [2018-08-07 12:17:31,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-08-07 12:17:31,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 251 [2018-08-07 12:17:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:31,572 INFO L225 Difference]: With dead ends: 33200 [2018-08-07 12:17:31,572 INFO L226 Difference]: Without dead ends: 17108 [2018-08-07 12:17:31,651 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1000 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=597, Invalid=1953, Unknown=0, NotChecked=0, Total=2550 [2018-08-07 12:17:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17108 states. [2018-08-07 12:17:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17108 to 16126. [2018-08-07 12:17:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16126 states. [2018-08-07 12:17:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16126 states to 16126 states and 20148 transitions. [2018-08-07 12:17:32,235 INFO L78 Accepts]: Start accepts. Automaton has 16126 states and 20148 transitions. Word has length 251 [2018-08-07 12:17:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:32,236 INFO L480 AbstractCegarLoop]: Abstraction has 16126 states and 20148 transitions. [2018-08-07 12:17:32,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-08-07 12:17:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 16126 states and 20148 transitions. [2018-08-07 12:17:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-08-07 12:17:32,278 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:32,279 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, 2, 2, 2, 2, 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] [2018-08-07 12:17:32,279 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:32,279 INFO L82 PathProgramCache]: Analyzing trace with hash 688980568, now seen corresponding path program 1 times [2018-08-07 12:17:32,280 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:32,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:32,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:32,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:32,281 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:32,937 WARN L170 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:17:33,416 WARN L170 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-08-07 12:17:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 92 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:17:33,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:33,680 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:33,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:33,696 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:33,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-08-07 12:17:33,946 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 92 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:17:34,418 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:17:34,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-08-07 12:17:34,419 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:17:34,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:17:34,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:17:34,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:17:34,420 INFO L87 Difference]: Start difference. First operand 16126 states and 20148 transitions. Second operand 5 states. [2018-08-07 12:17:37,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:37,224 INFO L93 Difference]: Finished difference Result 33795 states and 42175 transitions. [2018-08-07 12:17:37,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:17:37,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 294 [2018-08-07 12:17:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:37,286 INFO L225 Difference]: With dead ends: 33795 [2018-08-07 12:17:37,287 INFO L226 Difference]: Without dead ends: 17864 [2018-08-07 12:17:37,328 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 585 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:17:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17864 states. [2018-08-07 12:17:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17864 to 16871. [2018-08-07 12:17:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16871 states. [2018-08-07 12:17:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16871 states to 16871 states and 21085 transitions. [2018-08-07 12:17:37,706 INFO L78 Accepts]: Start accepts. Automaton has 16871 states and 21085 transitions. Word has length 294 [2018-08-07 12:17:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:37,707 INFO L480 AbstractCegarLoop]: Abstraction has 16871 states and 21085 transitions. [2018-08-07 12:17:37,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:17:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 16871 states and 21085 transitions. [2018-08-07 12:17:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-08-07 12:17:37,747 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:37,747 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:17:37,748 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1754982853, now seen corresponding path program 1 times [2018-08-07 12:17:37,748 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:37,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:37,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:37,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:37,749 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:38,593 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-08-07 12:17:39,259 WARN L170 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:17:39,756 WARN L170 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-08-07 12:17:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:40,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:40,129 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 12:17:40,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:40,136 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:40,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:40,909 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-08-07 12:17:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:41,654 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:42,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:42,598 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 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:17:42,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:42,617 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:42,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:43,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:17:43,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:17:43,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8, 5, 5] total 25 [2018-08-07 12:17:43,525 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:17:43,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-08-07 12:17:43,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-08-07 12:17:43,526 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-08-07 12:17:43,527 INFO L87 Difference]: Start difference. First operand 16871 states and 21085 transitions. Second operand 15 states. [2018-08-07 12:17:43,679 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-08-07 12:17:44,247 WARN L170 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2018-08-07 12:17:46,096 WARN L170 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-08-07 12:17:49,695 WARN L170 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2018-08-07 12:17:49,838 WARN L170 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2018-08-07 12:17:50,002 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2018-08-07 12:17:51,750 WARN L170 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2018-08-07 12:17:53,230 WARN L170 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2018-08-07 12:17:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:53,675 INFO L93 Difference]: Finished difference Result 36890 states and 46534 transitions. [2018-08-07 12:17:53,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-08-07 12:17:53,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 337 [2018-08-07 12:17:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:53,740 INFO L225 Difference]: With dead ends: 36890 [2018-08-07 12:17:53,740 INFO L226 Difference]: Without dead ends: 20214 [2018-08-07 12:17:53,788 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1391 GetRequests, 1338 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=682, Invalid=2074, Unknown=0, NotChecked=0, Total=2756 [2018-08-07 12:17:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20214 states. [2018-08-07 12:17:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20214 to 18680. [2018-08-07 12:17:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18680 states. [2018-08-07 12:17:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18680 states to 18680 states and 22609 transitions. [2018-08-07 12:17:54,160 INFO L78 Accepts]: Start accepts. Automaton has 18680 states and 22609 transitions. Word has length 337 [2018-08-07 12:17:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:54,161 INFO L480 AbstractCegarLoop]: Abstraction has 18680 states and 22609 transitions. [2018-08-07 12:17:54,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-08-07 12:17:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 18680 states and 22609 transitions. [2018-08-07 12:17:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-08-07 12:17:54,196 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:54,197 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:17:54,197 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1884219290, now seen corresponding path program 1 times [2018-08-07 12:17:54,198 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:54,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:54,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:54,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:54,199 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 5 proven. 94 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-08-07 12:17:54,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:54,707 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 12:17:54,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:54,717 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:54,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:58,239 WARN L170 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2018-08-07 12:18:02,347 WARN L170 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-08-07 12:18:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 5 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:18:03,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:06,835 WARN L170 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 75 DAG size of output: 7 [2018-08-07 12:18:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 209 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:18:07,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:07,163 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 12:18:07,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:07,179 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:07,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 5 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:18:08,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:18:08,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:18:08,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 9, 6] total 31 [2018-08-07 12:18:08,410 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:18:08,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-08-07 12:18:08,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-08-07 12:18:08,411 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=722, Unknown=4, NotChecked=0, Total=930 [2018-08-07 12:18:08,411 INFO L87 Difference]: Start difference. First operand 18680 states and 22609 transitions. Second operand 17 states. [2018-08-07 12:18:09,571 WARN L170 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-08-07 12:18:12,881 WARN L170 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2018-08-07 12:18:19,341 WARN L170 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-08-07 12:18:33,982 WARN L170 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 37 [2018-08-07 12:18:35,520 WARN L170 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 36 [2018-08-07 12:18:40,214 WARN L170 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 35 Received shutdown request... [2018-08-07 12:20:56,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-08-07 12:20:56,742 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:20:56,746 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:20:56,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:20:56 BoogieIcfgContainer [2018-08-07 12:20:56,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:20:56,747 INFO L168 Benchmark]: Toolchain (without parser) took 257545.23 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 204.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:20:56,748 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:20:56,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 940.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:20:56,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 167.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:20:56,750 INFO L168 Benchmark]: Boogie Preprocessor took 413.83 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 845.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -987.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:20:56,751 INFO L168 Benchmark]: RCFGBuilder took 5591.95 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 198.4 MB). Peak memory consumption was 198.4 MB. Max. memory is 7.1 GB. [2018-08-07 12:20:56,752 INFO L168 Benchmark]: TraceAbstraction took 250424.85 ms. Allocated memory was 2.4 GB in the beginning and 3.5 GB in the end (delta: 1.1 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:20:56,757 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 940.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 167.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 413.83 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 845.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -987.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5591.95 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 198.4 MB). Peak memory consumption was 198.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250424.85 ms. Allocated memory was 2.4 GB in the beginning and 3.5 GB in the end (delta: 1.1 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 144]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 144). Cancelled while BasicCegarLoop was constructing difference of abstraction (18680states) and FLOYD_HOARE automaton (currently 27 states, 17 states before enhancement), while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 250.3s OverallTime, 11 OverallIterations, 3 TraceHistogramMax, 216.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2375 SDtfs, 16826 SDslu, 2240 SDs, 0 SdLazy, 21904 SolverSat, 6320 SolverUnsat, 138 SolverUnknown, 0 SolverNotchecked, 183.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5813 GetRequests, 5588 SyntacticMatches, 20 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 43.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18680occurred in iteration=10, 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: 2.8s AutomataMinimizationTime, 10 MinimizatonAttempts, 4298 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 27.0s InterpolantComputationTime, 5206 NumberOfCodeBlocks, 5206 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 7987 ConstructedInterpolants, 25 QuantifiedInterpolants, 16766713 SizeOfPredicates, 39 NumberOfNonLiveVariables, 4818 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 31 InterpolantComputations, 10 PerfectInterpolantSequences, 3993/4963 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/Problem11_label57_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-20-56-774.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label57_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_12-20-56-774.csv Completed graceful shutdown