java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label22_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:03:48,409 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:03:48,411 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:03:48,427 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:03:48,427 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:03:48,428 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:03:48,430 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:03:48,432 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:03:48,433 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:03:48,434 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:03:48,435 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:03:48,435 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:03:48,436 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:03:48,437 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:03:48,438 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:03:48,439 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:03:48,440 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:03:48,442 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:03:48,444 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:03:48,445 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:03:48,446 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:03:48,447 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:03:48,450 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:03:48,450 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:03:48,450 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:03:48,451 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:03:48,452 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:03:48,453 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:03:48,454 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:03:48,455 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:03:48,455 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:03:48,456 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:03:48,456 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:03:48,456 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:03:48,457 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:03:48,458 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:03:48,459 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 [2018-07-24 12:03:48,475 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:03:48,475 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:03:48,477 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:03:48,477 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:03:48,477 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:03:48,477 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:03:48,480 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:03:48,480 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:03:48,481 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:03:48,481 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:03:48,481 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:03:48,482 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:03:48,482 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:03:48,483 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:03:48,483 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:03:48,483 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:03:48,483 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:03:48,484 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:03:48,484 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:03:48,484 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:03:48,484 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:03:48,486 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:03:48,486 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:03:48,486 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:03:48,486 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:03:48,487 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:03:48,487 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:03:48,487 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:03:48,487 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:03:48,487 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:03:48,488 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:03:48,488 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:03:48,488 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:03:48,535 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:03:48,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:03:48,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:03:48,559 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:03:48,559 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:03:48,560 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label22_false-unreach-call_false-termination.c [2018-07-24 12:03:48,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3443a6546/feda020201234211928ac43b79c01bc5/FLAG90daa3c88 [2018-07-24 12:03:49,202 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:03:49,203 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label22_false-unreach-call_false-termination.c [2018-07-24 12:03:49,219 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3443a6546/feda020201234211928ac43b79c01bc5/FLAG90daa3c88 [2018-07-24 12:03:49,239 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3443a6546/feda020201234211928ac43b79c01bc5 [2018-07-24 12:03:49,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:03:49,258 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:03:49,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:03:49,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:03:49,270 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:03:49,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:03:49" (1/1) ... [2018-07-24 12:03:49,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@251755e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:49, skipping insertion in model container [2018-07-24 12:03:49,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:03:49" (1/1) ... [2018-07-24 12:03:49,501 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:03:49,863 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:03:49,879 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:03:49,996 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:03:50,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50 WrapperNode [2018-07-24 12:03:50,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:03:50,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:03:50,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:03:50,044 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:03:50,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:03:50,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:03:50,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:03:50,157 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:03:50,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (1/1) ... [2018-07-24 12:03:50,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:03:50,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:03:50,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:03:50,452 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:03:50,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (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 [2018-07-24 12:03:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:03:50,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:03:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:03:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:03:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:03:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:03:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 12:03:50,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 12:03:54,092 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:03:54,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:03:54 BoogieIcfgContainer [2018-07-24 12:03:54,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:03:54,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:03:54,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:03:54,098 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:03:54,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:03:49" (1/3) ... [2018-07-24 12:03:54,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685e4140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:03:54, skipping insertion in model container [2018-07-24 12:03:54,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:50" (2/3) ... [2018-07-24 12:03:54,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685e4140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:03:54, skipping insertion in model container [2018-07-24 12:03:54,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:03:54" (3/3) ... [2018-07-24 12:03:54,102 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label22_false-unreach-call_false-termination.c [2018-07-24 12:03:54,113 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:03:54,122 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:03:54,174 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:03:54,175 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:03:54,175 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:03:54,176 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:03:54,176 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:03:54,176 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:03:54,176 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:03:54,176 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:03:54,177 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:03:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 12:03:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-24 12:03:54,212 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:54,213 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:54,213 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1019134148, now seen corresponding path program 1 times [2018-07-24 12:03:54,223 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:54,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:54,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:54,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:54,283 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:54,647 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:03:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:03:54,722 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:03:54,722 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:03:54,722 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:54,731 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:03:54,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:03:54,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:03:54,752 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-07-24 12:03:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:56,668 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-07-24 12:03:56,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:03:56,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-07-24 12:03:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:56,694 INFO L225 Difference]: With dead ends: 691 [2018-07-24 12:03:56,694 INFO L226 Difference]: Without dead ends: 434 [2018-07-24 12:03:56,703 INFO L573 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 [2018-07-24 12:03:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-07-24 12:03:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-07-24 12:03:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-24 12:03:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 755 transitions. [2018-07-24 12:03:56,788 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 755 transitions. Word has length 20 [2018-07-24 12:03:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:56,789 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 755 transitions. [2018-07-24 12:03:56,789 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:03:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 755 transitions. [2018-07-24 12:03:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-24 12:03:56,795 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:56,796 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:56,796 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1278967404, now seen corresponding path program 1 times [2018-07-24 12:03:56,797 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:56,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:56,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:56,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:56,799 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:03:57,134 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:03:57,134 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:03:57,135 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:57,137 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:03:57,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:03:57,137 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:03:57,138 INFO L87 Difference]: Start difference. First operand 434 states and 755 transitions. Second operand 6 states. [2018-07-24 12:03:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:59,510 INFO L93 Difference]: Finished difference Result 1254 states and 2256 transitions. [2018-07-24 12:03:59,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:03:59,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-07-24 12:03:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:59,523 INFO L225 Difference]: With dead ends: 1254 [2018-07-24 12:03:59,524 INFO L226 Difference]: Without dead ends: 826 [2018-07-24 12:03:59,526 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:03:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2018-07-24 12:03:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 812. [2018-07-24 12:03:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-07-24 12:03:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1377 transitions. [2018-07-24 12:03:59,588 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1377 transitions. Word has length 100 [2018-07-24 12:03:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:59,589 INFO L471 AbstractCegarLoop]: Abstraction has 812 states and 1377 transitions. [2018-07-24 12:03:59,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:03:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1377 transitions. [2018-07-24 12:03:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-24 12:03:59,597 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:59,597 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:59,598 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:59,598 INFO L82 PathProgramCache]: Analyzing trace with hash 590567563, now seen corresponding path program 1 times [2018-07-24 12:03:59,598 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:59,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:59,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:59,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:59,600 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:03:59,878 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:03:59,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:03:59,878 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:59,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:03:59,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:03:59,879 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:03:59,880 INFO L87 Difference]: Start difference. First operand 812 states and 1377 transitions. Second operand 4 states. [2018-07-24 12:04:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:04,315 INFO L93 Difference]: Finished difference Result 1988 states and 3385 transitions. [2018-07-24 12:04:04,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:04:04,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2018-07-24 12:04:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:04,329 INFO L225 Difference]: With dead ends: 1988 [2018-07-24 12:04:04,329 INFO L226 Difference]: Without dead ends: 1182 [2018-07-24 12:04:04,335 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:04:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-07-24 12:04:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2018-07-24 12:04:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2018-07-24 12:04:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1748 transitions. [2018-07-24 12:04:04,401 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1748 transitions. Word has length 133 [2018-07-24 12:04:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:04,402 INFO L471 AbstractCegarLoop]: Abstraction has 1182 states and 1748 transitions. [2018-07-24 12:04:04,402 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:04:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1748 transitions. [2018-07-24 12:04:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-07-24 12:04:04,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:04,411 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:04,412 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1598938460, now seen corresponding path program 1 times [2018-07-24 12:04:04,412 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:04,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:04,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:04,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:04,414 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 12:04:04,665 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:04:04,665 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:04:04,666 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:04,668 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:04:04,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:04:04,669 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:04:04,669 INFO L87 Difference]: Start difference. First operand 1182 states and 1748 transitions. Second operand 3 states. [2018-07-24 12:04:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:06,220 INFO L93 Difference]: Finished difference Result 3283 states and 4999 transitions. [2018-07-24 12:04:06,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:04:06,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 214 [2018-07-24 12:04:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:06,237 INFO L225 Difference]: With dead ends: 3283 [2018-07-24 12:04:06,238 INFO L226 Difference]: Without dead ends: 2107 [2018-07-24 12:04:06,248 INFO L573 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 [2018-07-24 12:04:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2018-07-24 12:04:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2105. [2018-07-24 12:04:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2018-07-24 12:04:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 3102 transitions. [2018-07-24 12:04:06,308 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 3102 transitions. Word has length 214 [2018-07-24 12:04:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:06,309 INFO L471 AbstractCegarLoop]: Abstraction has 2105 states and 3102 transitions. [2018-07-24 12:04:06,310 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:04:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 3102 transitions. [2018-07-24 12:04:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-24 12:04:06,317 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:06,317 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:06,317 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1385542788, now seen corresponding path program 1 times [2018-07-24 12:04:06,318 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:06,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:06,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:06,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:06,319 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:04:07,109 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:07,109 INFO L191 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 [2018-07-24 12:04:07,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:07,125 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:07,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:07,973 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:04:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:04:08,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:08,401 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:04:08,613 WARN L169 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-07-24 12:04:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 26 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:04:09,384 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:04:09,385 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-07-24 12:04:09,385 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:09,385 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:04:09,386 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:04:09,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:04:09,386 INFO L87 Difference]: Start difference. First operand 2105 states and 3102 transitions. Second operand 5 states. [2018-07-24 12:04:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:12,942 INFO L93 Difference]: Finished difference Result 5450 states and 8108 transitions. [2018-07-24 12:04:12,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:04:12,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2018-07-24 12:04:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:12,964 INFO L225 Difference]: With dead ends: 5450 [2018-07-24 12:04:12,964 INFO L226 Difference]: Without dead ends: 3351 [2018-07-24 12:04:12,977 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:04:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2018-07-24 12:04:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3291. [2018-07-24 12:04:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3291 states. [2018-07-24 12:04:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 4820 transitions. [2018-07-24 12:04:13,085 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 4820 transitions. Word has length 226 [2018-07-24 12:04:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:13,085 INFO L471 AbstractCegarLoop]: Abstraction has 3291 states and 4820 transitions. [2018-07-24 12:04:13,085 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:04:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 4820 transitions. [2018-07-24 12:04:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-07-24 12:04:13,096 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:13,096 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:04:13,097 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 640058784, now seen corresponding path program 1 times [2018-07-24 12:04:13,097 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:13,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:13,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:13,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:13,099 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:13,937 WARN L169 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 12:04:14,383 WARN L169 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:04:14,975 WARN L169 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-07-24 12:04:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 116 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:04:15,452 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:15,453 INFO L191 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 [2018-07-24 12:04:15,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:15,462 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:15,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:16,216 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:04:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:04:16,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 39 proven. 138 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-07-24 12:04:17,120 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:04:17,120 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-07-24 12:04:17,121 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:17,121 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:04:17,121 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:04:17,122 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:04:17,122 INFO L87 Difference]: Start difference. First operand 3291 states and 4820 transitions. Second operand 5 states. [2018-07-24 12:04:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:20,358 INFO L93 Difference]: Finished difference Result 7139 states and 10698 transitions. [2018-07-24 12:04:20,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 12:04:20,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 300 [2018-07-24 12:04:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:20,392 INFO L225 Difference]: With dead ends: 7139 [2018-07-24 12:04:20,393 INFO L226 Difference]: Without dead ends: 4038 [2018-07-24 12:04:20,409 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 595 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:04:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2018-07-24 12:04:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3985. [2018-07-24 12:04:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3985 states. [2018-07-24 12:04:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 5664 transitions. [2018-07-24 12:04:20,525 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 5664 transitions. Word has length 300 [2018-07-24 12:04:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:20,525 INFO L471 AbstractCegarLoop]: Abstraction has 3985 states and 5664 transitions. [2018-07-24 12:04:20,525 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:04:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 5664 transitions. [2018-07-24 12:04:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-07-24 12:04:20,543 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:20,543 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:04:20,543 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:20,544 INFO L82 PathProgramCache]: Analyzing trace with hash -832023541, now seen corresponding path program 1 times [2018-07-24 12:04:20,544 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:20,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:20,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:20,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:20,545 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 127 proven. 170 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:04:21,454 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:21,454 INFO L191 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 [2018-07-24 12:04:21,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:21,465 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:21,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 235 proven. 53 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:04:21,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 49 proven. 248 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:04:22,486 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:22,486 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:22,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:22,505 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:22,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 235 proven. 53 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:04:23,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 49 proven. 248 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:04:23,905 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:23,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-07-24 12:04:23,905 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:23,906 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:04:23,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:04:23,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2018-07-24 12:04:23,907 INFO L87 Difference]: Start difference. First operand 3985 states and 5664 transitions. Second operand 15 states. [2018-07-24 12:04:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:29,158 INFO L93 Difference]: Finished difference Result 8460 states and 12210 transitions. [2018-07-24 12:04:29,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-24 12:04:29,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 311 [2018-07-24 12:04:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:29,180 INFO L225 Difference]: With dead ends: 8460 [2018-07-24 12:04:29,180 INFO L226 Difference]: Without dead ends: 4462 [2018-07-24 12:04:29,199 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1288 GetRequests, 1241 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2018-07-24 12:04:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2018-07-24 12:04:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4177. [2018-07-24 12:04:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4177 states. [2018-07-24 12:04:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4177 states to 4177 states and 5415 transitions. [2018-07-24 12:04:29,313 INFO L78 Accepts]: Start accepts. Automaton has 4177 states and 5415 transitions. Word has length 311 [2018-07-24 12:04:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:29,314 INFO L471 AbstractCegarLoop]: Abstraction has 4177 states and 5415 transitions. [2018-07-24 12:04:29,314 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 12:04:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4177 states and 5415 transitions. [2018-07-24 12:04:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-07-24 12:04:29,326 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:29,327 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:04:29,327 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:29,327 INFO L82 PathProgramCache]: Analyzing trace with hash -154441192, now seen corresponding path program 1 times [2018-07-24 12:04:29,328 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:29,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:29,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:29,329 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 134 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:04:30,322 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:30,322 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:04:30,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:30,333 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:30,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:04:30,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 39 proven. 193 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-07-24 12:04:30,842 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:04:30,843 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 19 [2018-07-24 12:04:30,843 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:30,843 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:04:30,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:04:30,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:04:30,844 INFO L87 Difference]: Start difference. First operand 4177 states and 5415 transitions. Second operand 5 states. [2018-07-24 12:04:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:33,348 INFO L93 Difference]: Finished difference Result 12913 states and 17057 transitions. [2018-07-24 12:04:33,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:04:33,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2018-07-24 12:04:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:33,405 INFO L225 Difference]: With dead ends: 12913 [2018-07-24 12:04:33,406 INFO L226 Difference]: Without dead ends: 8926 [2018-07-24 12:04:33,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 668 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:04:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8926 states. [2018-07-24 12:04:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8926 to 8726. [2018-07-24 12:04:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8726 states. [2018-07-24 12:04:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 11052 transitions. [2018-07-24 12:04:33,669 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 11052 transitions. Word has length 336 [2018-07-24 12:04:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:33,669 INFO L471 AbstractCegarLoop]: Abstraction has 8726 states and 11052 transitions. [2018-07-24 12:04:33,669 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:04:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 11052 transitions. [2018-07-24 12:04:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-07-24 12:04:33,693 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:33,693 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:33,693 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:33,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1811913931, now seen corresponding path program 1 times [2018-07-24 12:04:33,694 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:33,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:33,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:33,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:33,695 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:34,423 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 12 [2018-07-24 12:04:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 12:04:34,607 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:34,607 INFO L191 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 [2018-07-24 12:04:34,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:34,675 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:34,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 12:04:35,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 12:04:35,860 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:35,860 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:35,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:35,881 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:36,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 12:04:36,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 12:04:36,561 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:36,561 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 12 [2018-07-24 12:04:36,561 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:36,562 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 12:04:36,563 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 12:04:36,563 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:04:36,563 INFO L87 Difference]: Start difference. First operand 8726 states and 11052 transitions. Second operand 10 states. [2018-07-24 12:04:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:40,835 INFO L93 Difference]: Finished difference Result 19969 states and 25700 transitions. [2018-07-24 12:04:40,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-24 12:04:40,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 447 [2018-07-24 12:04:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:40,871 INFO L225 Difference]: With dead ends: 19969 [2018-07-24 12:04:40,871 INFO L226 Difference]: Without dead ends: 11065 [2018-07-24 12:04:40,906 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1822 GetRequests, 1790 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:04:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11065 states. [2018-07-24 12:04:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11065 to 8765. [2018-07-24 12:04:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8765 states. [2018-07-24 12:04:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 10349 transitions. [2018-07-24 12:04:41,091 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 10349 transitions. Word has length 447 [2018-07-24 12:04:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:41,092 INFO L471 AbstractCegarLoop]: Abstraction has 8765 states and 10349 transitions. [2018-07-24 12:04:41,092 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 12:04:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 10349 transitions. [2018-07-24 12:04:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2018-07-24 12:04:41,110 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:41,111 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:41,111 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash 397123983, now seen corresponding path program 1 times [2018-07-24 12:04:41,111 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:41,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:41,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:41,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:41,113 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 284 proven. 92 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2018-07-24 12:04:41,891 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:41,891 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:04:41,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:41,902 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:42,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 539 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:04:42,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:42,663 WARN L169 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2018-07-24 12:04:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 284 proven. 92 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2018-07-24 12:04:43,175 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:43,175 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:43,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:43,190 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:43,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 533 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:04:43,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:43,952 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 12:04:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 284 proven. 92 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2018-07-24 12:04:44,610 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:44,610 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 20 [2018-07-24 12:04:44,610 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:44,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 12:04:44,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 12:04:44,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:04:44,614 INFO L87 Difference]: Start difference. First operand 8765 states and 10349 transitions. Second operand 10 states. [2018-07-24 12:04:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:52,109 INFO L93 Difference]: Finished difference Result 20379 states and 24435 transitions. [2018-07-24 12:04:52,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 12:04:52,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 465 [2018-07-24 12:04:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:52,152 INFO L225 Difference]: With dead ends: 20379 [2018-07-24 12:04:52,152 INFO L226 Difference]: Without dead ends: 11662 [2018-07-24 12:04:52,180 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1929 GetRequests, 1877 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=428, Invalid=2122, Unknown=0, NotChecked=0, Total=2550 [2018-07-24 12:04:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11662 states. [2018-07-24 12:04:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11662 to 11434. [2018-07-24 12:04:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11434 states. [2018-07-24 12:04:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 12801 transitions. [2018-07-24 12:04:52,406 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 12801 transitions. Word has length 465 [2018-07-24 12:04:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:52,407 INFO L471 AbstractCegarLoop]: Abstraction has 11434 states and 12801 transitions. [2018-07-24 12:04:52,407 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 12:04:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 12801 transitions. [2018-07-24 12:04:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2018-07-24 12:04:52,420 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:52,421 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-07-24 12:04:52,421 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash 872632160, now seen corresponding path program 1 times [2018-07-24 12:04:52,422 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:52,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:52,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:52,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:52,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 423 proven. 92 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2018-07-24 12:04:53,350 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:53,351 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:04:53,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:53,369 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:53,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 766 proven. 2 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2018-07-24 12:04:54,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 423 proven. 92 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2018-07-24 12:04:54,667 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:54,668 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:54,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:54,683 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:55,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 766 proven. 2 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2018-07-24 12:04:55,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 423 proven. 92 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2018-07-24 12:04:55,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:55,714 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 12:04:55,714 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:55,716 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:04:55,716 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:04:55,716 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:04:55,716 INFO L87 Difference]: Start difference. First operand 11434 states and 12801 transitions. Second operand 7 states. [2018-07-24 12:05:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:00,125 INFO L93 Difference]: Finished difference Result 32696 states and 39588 transitions. [2018-07-24 12:05:00,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 12:05:00,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 632 [2018-07-24 12:05:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:00,253 INFO L225 Difference]: With dead ends: 32696 [2018-07-24 12:05:00,254 INFO L226 Difference]: Without dead ends: 21636 [2018-07-24 12:05:00,319 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2544 GetRequests, 2529 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:05:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21636 states. [2018-07-24 12:05:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21636 to 20763. [2018-07-24 12:05:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20763 states. [2018-07-24 12:05:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20763 states to 20763 states and 23109 transitions. [2018-07-24 12:05:00,838 INFO L78 Accepts]: Start accepts. Automaton has 20763 states and 23109 transitions. Word has length 632 [2018-07-24 12:05:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:00,839 INFO L471 AbstractCegarLoop]: Abstraction has 20763 states and 23109 transitions. [2018-07-24 12:05:00,839 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:05:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 20763 states and 23109 transitions. [2018-07-24 12:05:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2018-07-24 12:05:00,857 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:00,857 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:00,857 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:00,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2071134331, now seen corresponding path program 1 times [2018-07-24 12:05:00,858 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:00,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:00,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:00,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:00,859 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:01,846 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-07-24 12:05:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 628 proven. 778 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-07-24 12:05:02,874 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:02,874 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:05:02,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:02,882 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:03,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 1110 proven. 2 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2018-07-24 12:05:03,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:04,070 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:05:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 621 proven. 92 refuted. 0 times theorem prover too weak. 1274 trivial. 0 not checked. [2018-07-24 12:05:05,159 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:05,160 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:05:05,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:05,175 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:05,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 1102 proven. 10 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2018-07-24 12:05:06,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 121 proven. 1000 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-07-24 12:05:08,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:08,912 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-07-24 12:05:08,912 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:08,913 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:05:08,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:05:08,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2018-07-24 12:05:08,914 INFO L87 Difference]: Start difference. First operand 20763 states and 23109 transitions. Second operand 17 states. [2018-07-24 12:05:16,418 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2018-07-24 12:05:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:18,297 INFO L93 Difference]: Finished difference Result 44749 states and 52590 transitions. [2018-07-24 12:05:18,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-24 12:05:18,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 739 [2018-07-24 12:05:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:18,361 INFO L225 Difference]: With dead ends: 44749 [2018-07-24 12:05:18,361 INFO L226 Difference]: Without dead ends: 17142 [2018-07-24 12:05:18,601 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3044 GetRequests, 2964 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1177, Invalid=4373, Unknown=0, NotChecked=0, Total=5550 [2018-07-24 12:05:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17142 states. [2018-07-24 12:05:18,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17142 to 16672. [2018-07-24 12:05:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16672 states. [2018-07-24 12:05:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16672 states to 16672 states and 17973 transitions. [2018-07-24 12:05:18,925 INFO L78 Accepts]: Start accepts. Automaton has 16672 states and 17973 transitions. Word has length 739 [2018-07-24 12:05:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:18,926 INFO L471 AbstractCegarLoop]: Abstraction has 16672 states and 17973 transitions. [2018-07-24 12:05:18,926 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:05:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 16672 states and 17973 transitions. [2018-07-24 12:05:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2018-07-24 12:05:18,938 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:18,939 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:18,939 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash 301281232, now seen corresponding path program 1 times [2018-07-24 12:05:18,940 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:18,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:18,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:18,942 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 604 proven. 92 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2018-07-24 12:05:19,760 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:19,760 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:05:19,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:19,768 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:20,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 1035 proven. 2 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2018-07-24 12:05:20,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 604 proven. 92 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2018-07-24 12:05:20,996 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:20,997 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:05:21,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:21,021 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:21,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 1035 proven. 2 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2018-07-24 12:05:21,848 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 604 proven. 92 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2018-07-24 12:05:22,237 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:22,237 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-07-24 12:05:22,238 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:22,239 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:05:22,239 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:05:22,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:05:22,240 INFO L87 Difference]: Start difference. First operand 16672 states and 17973 transitions. Second operand 6 states. [2018-07-24 12:05:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:24,033 INFO L93 Difference]: Finished difference Result 34123 states and 36900 transitions. [2018-07-24 12:05:24,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:05:24,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 792 [2018-07-24 12:05:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:24,091 INFO L225 Difference]: With dead ends: 34123 [2018-07-24 12:05:24,092 INFO L226 Difference]: Without dead ends: 17825 [2018-07-24 12:05:24,126 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3181 GetRequests, 3168 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:05:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17825 states. [2018-07-24 12:05:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17825 to 17476. [2018-07-24 12:05:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17476 states. [2018-07-24 12:05:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17476 states to 17476 states and 18684 transitions. [2018-07-24 12:05:24,414 INFO L78 Accepts]: Start accepts. Automaton has 17476 states and 18684 transitions. Word has length 792 [2018-07-24 12:05:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:24,415 INFO L471 AbstractCegarLoop]: Abstraction has 17476 states and 18684 transitions. [2018-07-24 12:05:24,416 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:05:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 17476 states and 18684 transitions. [2018-07-24 12:05:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2018-07-24 12:05:24,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:24,431 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:05:24,431 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1839025904, now seen corresponding path program 1 times [2018-07-24 12:05:24,432 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:24,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:24,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:24,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:24,433 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 665 proven. 857 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2018-07-24 12:05:26,895 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:26,895 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:05:26,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:26,904 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:27,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1189 proven. 2 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-07-24 12:05:28,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 681 proven. 92 refuted. 0 times theorem prover too weak. 1418 trivial. 0 not checked. [2018-07-24 12:05:28,676 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:28,676 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:05:28,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:28,693 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:29,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1184 proven. 25 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2018-07-24 12:05:29,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 681 proven. 92 refuted. 0 times theorem prover too weak. 1418 trivial. 0 not checked. [2018-07-24 12:05:30,359 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:30,360 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6, 5, 5] total 23 [2018-07-24 12:05:30,360 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:30,362 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 12:05:30,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 12:05:30,363 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:05:30,363 INFO L87 Difference]: Start difference. First operand 17476 states and 18684 transitions. Second operand 18 states. [2018-07-24 12:05:34,303 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2018-07-24 12:05:38,176 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-07-24 12:05:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:39,123 INFO L93 Difference]: Finished difference Result 35385 states and 38596 transitions. [2018-07-24 12:05:39,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-24 12:05:39,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 848 [2018-07-24 12:05:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:39,177 INFO L225 Difference]: With dead ends: 35385 [2018-07-24 12:05:39,177 INFO L226 Difference]: Without dead ends: 18283 [2018-07-24 12:05:39,210 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3473 GetRequests, 3413 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=878, Invalid=2904, Unknown=0, NotChecked=0, Total=3782 [2018-07-24 12:05:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18283 states. [2018-07-24 12:05:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18283 to 17422. [2018-07-24 12:05:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17422 states. [2018-07-24 12:05:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17422 states to 17422 states and 18480 transitions. [2018-07-24 12:05:39,521 INFO L78 Accepts]: Start accepts. Automaton has 17422 states and 18480 transitions. Word has length 848 [2018-07-24 12:05:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:39,522 INFO L471 AbstractCegarLoop]: Abstraction has 17422 states and 18480 transitions. [2018-07-24 12:05:39,522 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 12:05:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 17422 states and 18480 transitions. [2018-07-24 12:05:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 970 [2018-07-24 12:05:39,538 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:39,539 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:39,539 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1536880457, now seen corresponding path program 1 times [2018-07-24 12:05:39,540 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:39,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:39,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:39,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:39,542 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1327 proven. 6 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2018-07-24 12:05:40,632 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:40,633 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:05:40,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:40,642 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:40,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1327 proven. 6 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2018-07-24 12:05:41,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1327 proven. 92 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-07-24 12:05:42,209 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:42,209 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:05:42,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:42,226 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:42,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1327 proven. 6 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2018-07-24 12:05:43,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:43,465 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:05:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1327 proven. 92 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-07-24 12:05:44,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:44,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 13 [2018-07-24 12:05:44,216 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:44,218 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:05:44,218 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:05:44,218 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:05:44,218 INFO L87 Difference]: Start difference. First operand 17422 states and 18480 transitions. Second operand 8 states. [2018-07-24 12:05:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:47,647 INFO L93 Difference]: Finished difference Result 37168 states and 39518 transitions. [2018-07-24 12:05:47,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 12:05:47,647 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 969 [2018-07-24 12:05:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:47,683 INFO L225 Difference]: With dead ends: 37168 [2018-07-24 12:05:47,684 INFO L226 Difference]: Without dead ends: 20120 [2018-07-24 12:05:47,710 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3900 GetRequests, 3876 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:05:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2018-07-24 12:05:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 19990. [2018-07-24 12:05:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19990 states. [2018-07-24 12:05:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19990 states to 19990 states and 21222 transitions. [2018-07-24 12:05:48,015 INFO L78 Accepts]: Start accepts. Automaton has 19990 states and 21222 transitions. Word has length 969 [2018-07-24 12:05:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:48,016 INFO L471 AbstractCegarLoop]: Abstraction has 19990 states and 21222 transitions. [2018-07-24 12:05:48,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:05:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 19990 states and 21222 transitions. [2018-07-24 12:05:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1220 [2018-07-24 12:05:48,042 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:48,042 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:48,043 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1328126225, now seen corresponding path program 1 times [2018-07-24 12:05:48,043 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:48,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:48,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:48,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:48,044 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4614 backedges. 1059 proven. 907 refuted. 0 times theorem prover too weak. 2648 trivial. 0 not checked. [2018-07-24 12:05:50,706 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:50,706 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:05:50,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:50,713 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:51,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4614 backedges. 1824 proven. 2 refuted. 0 times theorem prover too weak. 2788 trivial. 0 not checked. [2018-07-24 12:05:51,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:52,206 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:05:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4614 backedges. 1068 proven. 92 refuted. 0 times theorem prover too weak. 3454 trivial. 0 not checked. [2018-07-24 12:05:53,720 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:53,721 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:05:53,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:53,743 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:54,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4614 backedges. 2857 proven. 22 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-07-24 12:05:56,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:56,815 WARN L169 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:06:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4614 backedges. 287 proven. 2949 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2018-07-24 12:06:01,090 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:06:01,090 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 10, 12] total 36 [2018-07-24 12:06:01,091 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:06:01,092 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:06:01,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:06:01,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2018-07-24 12:06:01,093 INFO L87 Difference]: Start difference. First operand 19990 states and 21222 transitions. Second operand 17 states. [2018-07-24 12:06:06,155 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2018-07-24 12:06:08,072 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-07-24 12:06:08,924 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2018-07-24 12:06:09,815 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-07-24 12:06:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:06:10,131 INFO L93 Difference]: Finished difference Result 40294 states and 42828 transitions. [2018-07-24 12:06:10,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-24 12:06:10,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1219 [2018-07-24 12:06:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:06:10,171 INFO L225 Difference]: With dead ends: 40294 [2018-07-24 12:06:10,171 INFO L226 Difference]: Without dead ends: 20678 [2018-07-24 12:06:10,196 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4954 GetRequests, 4879 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=863, Invalid=4687, Unknown=0, NotChecked=0, Total=5550 [2018-07-24 12:06:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20678 states. [2018-07-24 12:06:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20678 to 19892. [2018-07-24 12:06:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19892 states. [2018-07-24 12:06:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19892 states to 19892 states and 21019 transitions. [2018-07-24 12:06:10,463 INFO L78 Accepts]: Start accepts. Automaton has 19892 states and 21019 transitions. Word has length 1219 [2018-07-24 12:06:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:06:10,465 INFO L471 AbstractCegarLoop]: Abstraction has 19892 states and 21019 transitions. [2018-07-24 12:06:10,465 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:06:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 19892 states and 21019 transitions. [2018-07-24 12:06:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1351 [2018-07-24 12:06:10,501 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:06:10,501 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:06:10,502 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:06:10,502 INFO L82 PathProgramCache]: Analyzing trace with hash 161615736, now seen corresponding path program 1 times [2018-07-24 12:06:10,502 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:06:10,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:10,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:10,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:10,503 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:06:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5711 backedges. 843 proven. 3438 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-07-24 12:06:15,108 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:15,109 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:06:15,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:15,116 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:15,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5711 backedges. 2770 proven. 2 refuted. 0 times theorem prover too weak. 2939 trivial. 0 not checked. [2018-07-24 12:06:16,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5711 backedges. 1078 proven. 203 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2018-07-24 12:06:18,776 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:18,776 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 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 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:06:18,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:18,806 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:19,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:20,693 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2018-07-24 12:06:20,965 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:06:21,763 WARN L169 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-07-24 12:06:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5711 backedges. 3977 proven. 24 refuted. 0 times theorem prover too weak. 1710 trivial. 0 not checked. [2018-07-24 12:06:23,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:23,969 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-07-24 12:06:24,243 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2018-07-24 12:06:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5711 backedges. 314 proven. 3714 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2018-07-24 12:06:28,603 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:06:28,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5, 13, 14] total 45 [2018-07-24 12:06:28,604 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:06:28,605 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-24 12:06:28,605 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-24 12:06:28,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2018-07-24 12:06:28,606 INFO L87 Difference]: Start difference. First operand 19892 states and 21019 transitions. Second operand 22 states. [2018-07-24 12:06:29,414 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-07-24 12:06:29,597 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-07-24 12:06:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:06:43,549 INFO L93 Difference]: Finished difference Result 37377 states and 39617 transitions. [2018-07-24 12:06:43,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-24 12:06:43,550 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1350 [2018-07-24 12:06:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:06:43,576 INFO L225 Difference]: With dead ends: 37377 [2018-07-24 12:06:43,576 INFO L226 Difference]: Without dead ends: 17676 [2018-07-24 12:06:43,600 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5562 GetRequests, 5431 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5143 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1851, Invalid=14151, Unknown=0, NotChecked=0, Total=16002 [2018-07-24 12:06:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17676 states. [2018-07-24 12:06:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17676 to 16881. [2018-07-24 12:06:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16881 states. [2018-07-24 12:06:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16881 states to 16881 states and 17682 transitions. [2018-07-24 12:06:43,900 INFO L78 Accepts]: Start accepts. Automaton has 16881 states and 17682 transitions. Word has length 1350 [2018-07-24 12:06:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:06:43,901 INFO L471 AbstractCegarLoop]: Abstraction has 16881 states and 17682 transitions. [2018-07-24 12:06:43,901 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-24 12:06:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 16881 states and 17682 transitions. [2018-07-24 12:06:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1544 [2018-07-24 12:06:43,930 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:06:43,931 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:06:43,932 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:06:43,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1963616219, now seen corresponding path program 1 times [2018-07-24 12:06:43,932 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:06:43,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:43,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:43,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:43,934 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:06:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:45,081 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 12:06:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7103 backedges. 1363 proven. 1131 refuted. 0 times theorem prover too weak. 4609 trivial. 0 not checked. [2018-07-24 12:06:47,437 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:47,437 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:06:47,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:47,447 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:47,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7103 backedges. 2304 proven. 2 refuted. 0 times theorem prover too weak. 4797 trivial. 0 not checked. [2018-07-24 12:06:48,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7103 backedges. 1372 proven. 92 refuted. 0 times theorem prover too weak. 5639 trivial. 0 not checked. [2018-07-24 12:06:52,038 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:52,038 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 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 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:06:52,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:52,054 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:53,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7103 backedges. 2286 proven. 20 refuted. 0 times theorem prover too weak. 4797 trivial. 0 not checked. [2018-07-24 12:06:54,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:54,903 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 12:07:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7103 backedges. 283 proven. 2032 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2018-07-24 12:07:00,771 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:07:00,772 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 30 [2018-07-24 12:07:00,772 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:07:00,773 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:07:00,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:07:00,774 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2018-07-24 12:07:00,774 INFO L87 Difference]: Start difference. First operand 16881 states and 17682 transitions. Second operand 17 states. [2018-07-24 12:07:08,225 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-07-24 12:07:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:07:10,074 INFO L93 Difference]: Finished difference Result 33701 states and 35328 transitions. [2018-07-24 12:07:10,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-24 12:07:10,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1543 [2018-07-24 12:07:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:07:10,100 INFO L225 Difference]: With dead ends: 33701 [2018-07-24 12:07:10,100 INFO L226 Difference]: Without dead ends: 17196 [2018-07-24 12:07:10,120 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6255 GetRequests, 6180 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=807, Invalid=4305, Unknown=0, NotChecked=0, Total=5112 [2018-07-24 12:07:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17196 states. [2018-07-24 12:07:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17196 to 16873. [2018-07-24 12:07:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16873 states. [2018-07-24 12:07:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16873 states to 16873 states and 17604 transitions. [2018-07-24 12:07:10,320 INFO L78 Accepts]: Start accepts. Automaton has 16873 states and 17604 transitions. Word has length 1543 [2018-07-24 12:07:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:07:10,321 INFO L471 AbstractCegarLoop]: Abstraction has 16873 states and 17604 transitions. [2018-07-24 12:07:10,322 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:07:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 16873 states and 17604 transitions. [2018-07-24 12:07:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1705 [2018-07-24 12:07:10,347 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:07:10,348 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:07:10,348 INFO L414 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:07:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1678212120, now seen corresponding path program 1 times [2018-07-24 12:07:10,349 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:07:10,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:10,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:10,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:10,350 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:07:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:11,259 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:07:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 1639 proven. 344 refuted. 0 times theorem prover too weak. 6545 trivial. 0 not checked. [2018-07-24 12:07:12,883 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:12,883 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:07:12,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:12,895 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:13,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 2680 proven. 2 refuted. 0 times theorem prover too weak. 5846 trivial. 0 not checked. [2018-07-24 12:07:14,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 1660 proven. 92 refuted. 0 times theorem prover too weak. 6776 trivial. 0 not checked. [2018-07-24 12:07:16,378 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:16,378 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 28 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 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:07:16,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:16,396 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:17,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 2680 proven. 2 refuted. 0 times theorem prover too weak. 5846 trivial. 0 not checked. [2018-07-24 12:07:18,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 1660 proven. 92 refuted. 0 times theorem prover too weak. 6776 trivial. 0 not checked. [2018-07-24 12:07:19,843 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:07:19,845 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 12 [2018-07-24 12:07:19,845 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:07:19,847 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:07:19,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:07:19,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:07:19,848 INFO L87 Difference]: Start difference. First operand 16873 states and 17604 transitions. Second operand 11 states. [2018-07-24 12:07:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:07:23,970 INFO L93 Difference]: Finished difference Result 33147 states and 34611 transitions. [2018-07-24 12:07:23,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-24 12:07:23,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1704 [2018-07-24 12:07:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:07:23,978 INFO L225 Difference]: With dead ends: 33147 [2018-07-24 12:07:23,979 INFO L226 Difference]: Without dead ends: 5444 [2018-07-24 12:07:24,000 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6859 GetRequests, 6825 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2018-07-24 12:07:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2018-07-24 12:07:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 5126. [2018-07-24 12:07:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5126 states. [2018-07-24 12:07:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 5242 transitions. [2018-07-24 12:07:24,068 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 5242 transitions. Word has length 1704 [2018-07-24 12:07:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:07:24,069 INFO L471 AbstractCegarLoop]: Abstraction has 5126 states and 5242 transitions. [2018-07-24 12:07:24,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:07:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 5242 transitions. [2018-07-24 12:07:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1723 [2018-07-24 12:07:24,090 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:07:24,091 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:07:24,091 INFO L414 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:07:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1433284672, now seen corresponding path program 1 times [2018-07-24 12:07:24,092 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:07:24,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:24,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:24,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:24,093 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:07:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:25,639 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 12:07:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8634 backedges. 1447 proven. 2056 refuted. 0 times theorem prover too weak. 5131 trivial. 0 not checked. [2018-07-24 12:07:28,782 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:28,782 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:07:28,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:28,790 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:29,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8634 backedges. 2544 proven. 2 refuted. 0 times theorem prover too weak. 6088 trivial. 0 not checked. [2018-07-24 12:07:30,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8634 backedges. 1524 proven. 92 refuted. 0 times theorem prover too weak. 7018 trivial. 0 not checked. [2018-07-24 12:07:32,183 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:32,183 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 30 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 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:07:32,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:32,199 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:33,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8634 backedges. 2524 proven. 22 refuted. 0 times theorem prover too weak. 6088 trivial. 0 not checked. [2018-07-24 12:07:35,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-07-24 12:07:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8634 backedges. 235 proven. 2320 refuted. 0 times theorem prover too weak. 6079 trivial. 0 not checked. [2018-07-24 12:07:40,582 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:07:40,583 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 8, 8] total 29 [2018-07-24 12:07:40,583 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:07:40,584 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 12:07:40,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 12:07:40,585 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2018-07-24 12:07:40,585 INFO L87 Difference]: Start difference. First operand 5126 states and 5242 transitions. Second operand 18 states. [2018-07-24 12:07:40,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 12:07:40,586 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:07:40,591 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:07:40,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:07:40 BoogieIcfgContainer [2018-07-24 12:07:40,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:07:40,592 INFO L168 Benchmark]: Toolchain (without parser) took 231337.51 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.2 GB). Peak memory consumption was 369.2 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:40,593 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:07:40,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 782.79 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:40,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 112.92 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:40,594 INFO L168 Benchmark]: Boogie Preprocessor took 294.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -894.3 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:40,594 INFO L168 Benchmark]: RCFGBuilder took 3642.34 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 165.8 MB). Peak memory consumption was 165.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:40,595 INFO L168 Benchmark]: TraceAbstraction took 226496.69 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 260.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:40,599 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 782.79 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 112.92 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 294.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -894.3 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3642.34 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 165.8 MB). Peak memory consumption was 165.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 226496.69 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 260.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 43). Cancelled while BasicCegarLoop was constructing difference of abstraction (5126states) and interpolant automaton (currently 2 states, 18 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 226.4s OverallTime, 20 OverallIterations, 14 TraceHistogramMax, 103.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1995 SDtfs, 45287 SDslu, 4193 SDs, 0 SdLazy, 58229 SolverSat, 7507 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53528 GetRequests, 52773 SyntacticMatches, 75 SemanticMatches, 680 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12352 ImplicationChecksByTransitivity, 42.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20763occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.8s AutomataMinimizationTime, 19 MinimizatonAttempts, 8047 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 12.9s SatisfiabilityAnalysisTime, 87.8s InterpolantComputationTime, 40414 NumberOfCodeBlocks, 40414 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 66680 ConstructedInterpolants, 29 QuantifiedInterpolants, 306321417 SizeOfPredicates, 80 NumberOfNonLiveVariables, 37559 ConjunctsInSsa, 520 ConjunctsInUnsatCore, 78 InterpolantComputations, 7 PerfectInterpolantSequences, 207187/232335 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/Problem14_label22_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-07-40-610.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label22_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-07-40-610.csv Completed graceful shutdown