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/Problem10_label50_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 11:44:17,153 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 11:44:17,156 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 11:44:17,174 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 11:44:17,175 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 11:44:17,176 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 11:44:17,177 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 11:44:17,179 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 11:44:17,184 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 11:44:17,185 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 11:44:17,186 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 11:44:17,186 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 11:44:17,187 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 11:44:17,188 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 11:44:17,189 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 11:44:17,190 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 11:44:17,194 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 11:44:17,196 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 11:44:17,202 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 11:44:17,205 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 11:44:17,207 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 11:44:17,210 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 11:44:17,215 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 11:44:17,215 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 11:44:17,215 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 11:44:17,217 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 11:44:17,219 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 11:44:17,220 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 11:44:17,221 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 11:44:17,224 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 11:44:17,226 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 11:44:17,227 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 11:44:17,227 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 11:44:17,229 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 11:44:17,230 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 11:44:17,231 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 11:44:17,232 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 11:44:17,258 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 11:44:17,259 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 11:44:17,260 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 11:44:17,260 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 11:44:17,260 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 11:44:17,261 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 11:44:17,261 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 11:44:17,261 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 11:44:17,261 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 11:44:17,261 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 11:44:17,261 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 11:44:17,262 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 11:44:17,262 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 11:44:17,263 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 11:44:17,263 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 11:44:17,263 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 11:44:17,263 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 11:44:17,263 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 11:44:17,263 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 11:44:17,264 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 11:44:17,264 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 11:44:17,264 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 11:44:17,264 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 11:44:17,264 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:44:17,265 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 11:44:17,265 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 11:44:17,265 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 11:44:17,265 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 11:44:17,265 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 11:44:17,266 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 11:44:17,266 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 11:44:17,266 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 11:44:17,266 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 11:44:17,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 11:44:17,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 11:44:17,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 11:44:17,361 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 11:44:17,361 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 11:44:17,362 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label50_false-unreach-call.c [2018-07-24 11:44:17,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee82648d2/10022fb5c91c4d978a633ccbd61e7a1d/FLAG0642f5677 [2018-07-24 11:44:18,013 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 11:44:18,014 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label50_false-unreach-call.c [2018-07-24 11:44:18,035 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee82648d2/10022fb5c91c4d978a633ccbd61e7a1d/FLAG0642f5677 [2018-07-24 11:44:18,057 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee82648d2/10022fb5c91c4d978a633ccbd61e7a1d [2018-07-24 11:44:18,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 11:44:18,074 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 11:44:18,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 11:44:18,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 11:44:18,081 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 11:44:18,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:18,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66832ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18, skipping insertion in model container [2018-07-24 11:44:18,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:18,352 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 11:44:18,674 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:44:18,691 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 11:44:18,806 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:44:18,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18 WrapperNode [2018-07-24 11:44:18,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 11:44:18,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 11:44:18,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 11:44:18,871 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 11:44:18,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:18,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:18,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 11:44:19,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 11:44:19,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 11:44:19,004 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 11:44:19,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:19,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:19,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:19,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:19,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:19,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:19,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (1/1) ... [2018-07-24 11:44:19,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 11:44:19,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 11:44:19,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 11:44:19,306 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 11:44:19,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (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 11:44:19,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 11:44:19,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 11:44:19,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 11:44:19,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 11:44:19,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 11:44:19,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 11:44:19,397 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:44:19,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:44:22,919 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 11:44:22,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:44:22 BoogieIcfgContainer [2018-07-24 11:44:22,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 11:44:22,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 11:44:22,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 11:44:22,925 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 11:44:22,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 11:44:18" (1/3) ... [2018-07-24 11:44:22,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45533b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:44:22, skipping insertion in model container [2018-07-24 11:44:22,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:44:18" (2/3) ... [2018-07-24 11:44:22,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45533b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:44:22, skipping insertion in model container [2018-07-24 11:44:22,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:44:22" (3/3) ... [2018-07-24 11:44:22,930 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label50_false-unreach-call.c [2018-07-24 11:44:22,939 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 11:44:22,947 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 11:44:23,001 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 11:44:23,001 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 11:44:23,002 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 11:44:23,002 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 11:44:23,002 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 11:44:23,002 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 11:44:23,002 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 11:44:23,003 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 11:44:23,003 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 11:44:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-07-24 11:44:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-24 11:44:23,051 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:23,054 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:44:23,054 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1972416020, now seen corresponding path program 1 times [2018-07-24 11:44:23,062 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:23,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:23,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:23,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:23,108 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:23,452 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-07-24 11:44:23,458 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 11:44:23,461 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:44:23,462 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 11:44:23,462 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:23,469 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 11:44:23,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 11:44:23,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 11:44:23,489 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 4 states. [2018-07-24 11:44:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:26,711 INFO L93 Difference]: Finished difference Result 737 states and 1298 transitions. [2018-07-24 11:44:26,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 11:44:26,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-07-24 11:44:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:26,734 INFO L225 Difference]: With dead ends: 737 [2018-07-24 11:44:26,734 INFO L226 Difference]: Without dead ends: 515 [2018-07-24 11:44:26,743 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 11:44:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-07-24 11:44:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2018-07-24 11:44:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-07-24 11:44:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 848 transitions. [2018-07-24 11:44:26,837 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 848 transitions. Word has length 16 [2018-07-24 11:44:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:26,838 INFO L471 AbstractCegarLoop]: Abstraction has 515 states and 848 transitions. [2018-07-24 11:44:26,838 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 11:44:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 848 transitions. [2018-07-24 11:44:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-24 11:44:26,843 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:26,844 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 11:44:26,844 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:26,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1107712437, now seen corresponding path program 1 times [2018-07-24 11:44:26,845 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:26,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:26,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:26,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:26,846 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:44:27,229 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:44:27,229 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:44:27,229 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:27,231 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:44:27,231 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:44:27,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:44:27,232 INFO L87 Difference]: Start difference. First operand 515 states and 848 transitions. Second operand 6 states. [2018-07-24 11:44:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:30,556 INFO L93 Difference]: Finished difference Result 1863 states and 3251 transitions. [2018-07-24 11:44:30,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:44:30,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2018-07-24 11:44:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:30,576 INFO L225 Difference]: With dead ends: 1863 [2018-07-24 11:44:30,577 INFO L226 Difference]: Without dead ends: 1354 [2018-07-24 11:44:30,585 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 11:44:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2018-07-24 11:44:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1331. [2018-07-24 11:44:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-07-24 11:44:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2051 transitions. [2018-07-24 11:44:30,690 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2051 transitions. Word has length 91 [2018-07-24 11:44:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:30,691 INFO L471 AbstractCegarLoop]: Abstraction has 1331 states and 2051 transitions. [2018-07-24 11:44:30,691 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:44:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2051 transitions. [2018-07-24 11:44:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-24 11:44:30,699 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:30,700 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:44:30,700 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:30,700 INFO L82 PathProgramCache]: Analyzing trace with hash -675310489, now seen corresponding path program 1 times [2018-07-24 11:44:30,701 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:30,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:30,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:30,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:30,702 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:31,015 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:44:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:44:31,206 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:44:31,206 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:44:31,206 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:31,207 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:44:31,207 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:44:31,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:44:31,208 INFO L87 Difference]: Start difference. First operand 1331 states and 2051 transitions. Second operand 6 states. [2018-07-24 11:44:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:35,366 INFO L93 Difference]: Finished difference Result 3512 states and 5693 transitions. [2018-07-24 11:44:35,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:44:35,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2018-07-24 11:44:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:35,385 INFO L225 Difference]: With dead ends: 3512 [2018-07-24 11:44:35,385 INFO L226 Difference]: Without dead ends: 2187 [2018-07-24 11:44:35,395 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:44:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2018-07-24 11:44:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2165. [2018-07-24 11:44:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2165 states. [2018-07-24 11:44:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3178 transitions. [2018-07-24 11:44:35,472 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3178 transitions. Word has length 93 [2018-07-24 11:44:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:35,473 INFO L471 AbstractCegarLoop]: Abstraction has 2165 states and 3178 transitions. [2018-07-24 11:44:35,473 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:44:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3178 transitions. [2018-07-24 11:44:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-24 11:44:35,478 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:35,478 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 11:44:35,478 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash 723704128, now seen corresponding path program 1 times [2018-07-24 11:44:35,479 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:35,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:35,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:35,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:35,480 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:44:35,586 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:44:35,586 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 11:44:35,586 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:35,586 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 11:44:35,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 11:44:35,587 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 11:44:35,587 INFO L87 Difference]: Start difference. First operand 2165 states and 3178 transitions. Second operand 4 states. [2018-07-24 11:44:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:36,982 INFO L93 Difference]: Finished difference Result 4762 states and 7145 transitions. [2018-07-24 11:44:36,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 11:44:36,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2018-07-24 11:44:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:36,998 INFO L225 Difference]: With dead ends: 4762 [2018-07-24 11:44:36,999 INFO L226 Difference]: Without dead ends: 2603 [2018-07-24 11:44:37,012 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 11:44:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2018-07-24 11:44:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2603. [2018-07-24 11:44:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2603 states. [2018-07-24 11:44:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 3602 transitions. [2018-07-24 11:44:37,083 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 3602 transitions. Word has length 96 [2018-07-24 11:44:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:37,084 INFO L471 AbstractCegarLoop]: Abstraction has 2603 states and 3602 transitions. [2018-07-24 11:44:37,084 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 11:44:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 3602 transitions. [2018-07-24 11:44:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-24 11:44:37,087 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:37,087 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 11:44:37,087 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:37,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1015456132, now seen corresponding path program 1 times [2018-07-24 11:44:37,088 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:37,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:37,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:37,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:37,089 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 11:44:37,338 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:44:37,338 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 11:44:37,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:37,348 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:44:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:37,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:44:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:44:37,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:44:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:44:37,903 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:44:37,903 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-07-24 11:44:37,903 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:37,904 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:44:37,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:44:37,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 11:44:37,905 INFO L87 Difference]: Start difference. First operand 2603 states and 3602 transitions. Second operand 3 states. [2018-07-24 11:44:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:39,859 INFO L93 Difference]: Finished difference Result 6552 states and 9446 transitions. [2018-07-24 11:44:39,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:44:39,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2018-07-24 11:44:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:39,884 INFO L225 Difference]: With dead ends: 6552 [2018-07-24 11:44:39,885 INFO L226 Difference]: Without dead ends: 3955 [2018-07-24 11:44:39,899 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 11:44:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2018-07-24 11:44:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3939. [2018-07-24 11:44:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3939 states. [2018-07-24 11:44:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 5471 transitions. [2018-07-24 11:44:40,044 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 5471 transitions. Word has length 114 [2018-07-24 11:44:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:40,045 INFO L471 AbstractCegarLoop]: Abstraction has 3939 states and 5471 transitions. [2018-07-24 11:44:40,045 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:44:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 5471 transitions. [2018-07-24 11:44:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-24 11:44:40,051 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:40,051 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:44:40,051 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:40,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1372802563, now seen corresponding path program 1 times [2018-07-24 11:44:40,052 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:40,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:40,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:40,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:40,055 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:40,398 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:44:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:44:40,842 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:44:40,843 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:44:40,843 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:40,843 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:44:40,844 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:44:40,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:44:40,844 INFO L87 Difference]: Start difference. First operand 3939 states and 5471 transitions. Second operand 6 states. [2018-07-24 11:44:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:45,966 INFO L93 Difference]: Finished difference Result 9229 states and 13489 transitions. [2018-07-24 11:44:45,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:44:45,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2018-07-24 11:44:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:46,009 INFO L225 Difference]: With dead ends: 9229 [2018-07-24 11:44:46,009 INFO L226 Difference]: Without dead ends: 5296 [2018-07-24 11:44:46,028 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:44:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2018-07-24 11:44:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 5242. [2018-07-24 11:44:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5242 states. [2018-07-24 11:44:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5242 states to 5242 states and 7114 transitions. [2018-07-24 11:44:46,175 INFO L78 Accepts]: Start accepts. Automaton has 5242 states and 7114 transitions. Word has length 159 [2018-07-24 11:44:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:46,175 INFO L471 AbstractCegarLoop]: Abstraction has 5242 states and 7114 transitions. [2018-07-24 11:44:46,176 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:44:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5242 states and 7114 transitions. [2018-07-24 11:44:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-07-24 11:44:46,195 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:46,196 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:46,196 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1799435073, now seen corresponding path program 1 times [2018-07-24 11:44:46,196 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:46,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:46,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:46,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:46,198 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:44:46,746 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:44:46,746 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 11:44:46,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:46,758 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:44:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:46,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:44:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:44:47,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:44:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:44:47,597 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:44:47,597 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2018-07-24 11:44:47,598 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:47,599 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:44:47,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:44:47,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 11:44:47,600 INFO L87 Difference]: Start difference. First operand 5242 states and 7114 transitions. Second operand 5 states. [2018-07-24 11:44:47,827 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-07-24 11:44:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:52,933 INFO L93 Difference]: Finished difference Result 11591 states and 16194 transitions. [2018-07-24 11:44:52,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:44:52,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2018-07-24 11:44:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:52,974 INFO L225 Difference]: With dead ends: 11591 [2018-07-24 11:44:52,974 INFO L226 Difference]: Without dead ends: 6355 [2018-07-24 11:44:52,995 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-07-24 11:44:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6355 states. [2018-07-24 11:44:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6355 to 6309. [2018-07-24 11:44:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6309 states. [2018-07-24 11:44:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6309 states to 6309 states and 8505 transitions. [2018-07-24 11:44:53,164 INFO L78 Accepts]: Start accepts. Automaton has 6309 states and 8505 transitions. Word has length 247 [2018-07-24 11:44:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:53,165 INFO L471 AbstractCegarLoop]: Abstraction has 6309 states and 8505 transitions. [2018-07-24 11:44:53,165 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:44:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 6309 states and 8505 transitions. [2018-07-24 11:44:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-24 11:44:53,183 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:53,183 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:53,184 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1161241935, now seen corresponding path program 1 times [2018-07-24 11:44:53,184 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:53,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:53,185 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 18 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:44:53,518 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:44:53,518 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 11:44:53,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:53,525 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:44:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:53,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:44:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:44:53,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:44:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 18 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:44:54,056 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:44:54,056 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 11:44:54,056 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:44:54,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:44:54,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:44:54,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-07-24 11:44:54,057 INFO L87 Difference]: Start difference. First operand 6309 states and 8505 transitions. Second operand 5 states. [2018-07-24 11:44:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:44:56,272 INFO L93 Difference]: Finished difference Result 13177 states and 18709 transitions. [2018-07-24 11:44:56,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:44:56,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2018-07-24 11:44:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:44:56,313 INFO L225 Difference]: With dead ends: 13177 [2018-07-24 11:44:56,313 INFO L226 Difference]: Without dead ends: 7018 [2018-07-24 11:44:56,329 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 504 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-07-24 11:44:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2018-07-24 11:44:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 6421. [2018-07-24 11:44:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6421 states. [2018-07-24 11:44:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6421 states to 6421 states and 8029 transitions. [2018-07-24 11:44:56,513 INFO L78 Accepts]: Start accepts. Automaton has 6421 states and 8029 transitions. Word has length 255 [2018-07-24 11:44:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:44:56,514 INFO L471 AbstractCegarLoop]: Abstraction has 6421 states and 8029 transitions. [2018-07-24 11:44:56,514 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:44:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 6421 states and 8029 transitions. [2018-07-24 11:44:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-07-24 11:44:56,534 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:44:56,535 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:44:56,535 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:44:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash -480405832, now seen corresponding path program 1 times [2018-07-24 11:44:56,535 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:44:56,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:56,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:56,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:44:56,537 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:44:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:56,961 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 11:44:57,161 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 11:44:57,387 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-07-24 11:44:57,810 WARN L169 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-07-24 11:44:58,046 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-07-24 11:44:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 101 proven. 87 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-07-24 11:44:58,533 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:44:58,533 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:44:58,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:58,542 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:44:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:58,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:44:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:44:59,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:44:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 101 proven. 87 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-07-24 11:44:59,494 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:44:59,494 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:44:59,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:44:59,510 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:44:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:44:59,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:44:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:44:59,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:45:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 101 proven. 87 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-07-24 11:45:00,291 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:45:00,291 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 22 [2018-07-24 11:45:00,291 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:45:00,292 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 11:45:00,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 11:45:00,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-07-24 11:45:00,293 INFO L87 Difference]: Start difference. First operand 6421 states and 8029 transitions. Second operand 16 states. [2018-07-24 11:45:00,439 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-07-24 11:45:06,608 WARN L169 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-07-24 11:45:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:45:09,528 INFO L93 Difference]: Finished difference Result 13650 states and 17556 transitions. [2018-07-24 11:45:09,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-24 11:45:09,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 318 [2018-07-24 11:45:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:45:09,561 INFO L225 Difference]: With dead ends: 13650 [2018-07-24 11:45:09,561 INFO L226 Difference]: Without dead ends: 7379 [2018-07-24 11:45:09,575 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 1289 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=658, Invalid=2098, Unknown=0, NotChecked=0, Total=2756 [2018-07-24 11:45:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2018-07-24 11:45:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 6873. [2018-07-24 11:45:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6873 states. [2018-07-24 11:45:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6873 states to 6873 states and 8107 transitions. [2018-07-24 11:45:09,712 INFO L78 Accepts]: Start accepts. Automaton has 6873 states and 8107 transitions. Word has length 318 [2018-07-24 11:45:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:45:09,713 INFO L471 AbstractCegarLoop]: Abstraction has 6873 states and 8107 transitions. [2018-07-24 11:45:09,713 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 11:45:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6873 states and 8107 transitions. [2018-07-24 11:45:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-07-24 11:45:09,731 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:45:09,731 INFO L353 BasicCegarLoop]: trace histogram [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, 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] [2018-07-24 11:45:09,732 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:45:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash 504254187, now seen corresponding path program 1 times [2018-07-24 11:45:09,732 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:45:09,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:45:09,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:45:09,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:45:09,733 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:45:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:45:10,034 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:45:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 33 proven. 164 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 11:45:10,292 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:45:10,292 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 11:45:10,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:45:10,302 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:45:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:45:10,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:45:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:45:10,550 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:45:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 110 proven. 87 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 11:45:10,747 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:45:10,748 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 11:45:10,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:45:10,766 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:45:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:45:11,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:45:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:45:11,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:45:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 110 proven. 87 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 11:45:11,311 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:45:11,312 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 15 [2018-07-24 11:45:11,312 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:45:11,313 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 11:45:11,314 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 11:45:11,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 11:45:11,314 INFO L87 Difference]: Start difference. First operand 6873 states and 8107 transitions. Second operand 11 states. [2018-07-24 11:45:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:45:14,530 INFO L93 Difference]: Finished difference Result 16629 states and 19729 transitions. [2018-07-24 11:45:14,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-24 11:45:14,531 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327 [2018-07-24 11:45:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:45:14,539 INFO L225 Difference]: With dead ends: 16629 [2018-07-24 11:45:14,540 INFO L226 Difference]: Without dead ends: 3049 [2018-07-24 11:45:14,559 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1341 GetRequests, 1309 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2018-07-24 11:45:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2018-07-24 11:45:14,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2459. [2018-07-24 11:45:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2459 states. [2018-07-24 11:45:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 2704 transitions. [2018-07-24 11:45:14,610 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 2704 transitions. Word has length 327 [2018-07-24 11:45:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:45:14,610 INFO L471 AbstractCegarLoop]: Abstraction has 2459 states and 2704 transitions. [2018-07-24 11:45:14,611 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 11:45:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 2704 transitions. [2018-07-24 11:45:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-07-24 11:45:14,620 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:45:14,621 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:45:14,621 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:45:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 777991539, now seen corresponding path program 1 times [2018-07-24 11:45:14,621 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:45:14,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:45:14,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:45:14,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:45:14,623 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:45:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:45:15,337 WARN L169 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-07-24 11:45:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 118 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:45:16,019 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:45:16,019 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 11:45:16,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:45:16,026 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:45:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:45:16,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:45:18,739 WARN L169 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 184 DAG size of output: 38 [2018-07-24 11:45:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 305 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:45:19,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:45:20,011 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-07-24 11:45:20,135 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-07-24 11:45:20,801 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-07-24 11:45:20,888 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 11:45:21,214 WARN L169 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2018-07-24 11:45:21,219 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,289 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,417 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,471 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,523 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,576 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,635 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,721 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,774 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,826 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:21,878 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,031 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,160 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,242 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,307 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,368 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,429 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,484 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,566 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,619 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,672 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,741 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,857 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:22,966 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:23,023 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:23,120 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:23,173 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:23,510 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:23,834 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,156 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,361 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,416 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,472 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,529 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,583 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,665 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,726 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,832 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,901 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:24,977 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,044 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,123 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,185 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,262 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,318 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,378 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,451 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,513 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,568 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,619 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,673 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,730 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,783 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,834 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,915 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:25,971 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,028 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,161 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,212 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,267 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,322 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,374 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,425 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,477 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,528 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,582 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,634 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,687 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,744 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,798 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,853 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,904 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:26,955 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,020 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,072 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,125 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,177 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,238 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,291 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,367 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,421 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,478 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,532 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,623 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:27,680 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:28,023 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:28,336 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:28,657 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:28,974 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,153 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,234 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,316 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,369 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,426 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,480 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,572 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,625 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,676 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,753 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,824 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,891 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:29,956 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:30,011 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:30,073 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:30,131 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:30,189 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:30,243 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:30,584 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 11:45:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 37 proven. 277 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:45:31,434 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:45:31,434 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 11:45:31,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:45:31,451 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:45:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:45:31,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:45:32,087 WARN L169 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2018-07-24 11:45:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 305 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 11:45:32,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:45:41,688 WARN L169 SmtUtils]: Spent 8.16 s on a formula simplification. DAG size of input: 392 DAG size of output: 30 [2018-07-24 11:45:41,690 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 11:45:41,944 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2018-07-24 11:45:41,949 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2018-07-24 11:45:43,822 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 1000