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/Problem18_label08_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:30:40,325 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:30:40,327 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:30:40,339 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:30:40,339 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:30:40,340 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:30:40,341 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:30:40,343 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:30:40,345 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:30:40,346 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:30:40,347 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:30:40,347 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:30:40,348 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:30:40,349 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:30:40,350 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:30:40,351 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:30:40,351 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:30:40,353 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:30:40,355 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:30:40,357 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:30:40,358 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:30:40,359 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:30:40,361 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:30:40,361 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:30:40,362 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:30:40,362 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:30:40,363 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:30:40,364 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:30:40,365 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:30:40,366 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:30:40,366 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:30:40,367 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:30:40,367 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:30:40,367 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:30:40,368 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:30:40,369 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:30:40,369 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:30:40,393 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:30:40,394 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:30:40,395 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:30:40,395 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:30:40,395 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:30:40,395 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:30:40,396 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:30:40,396 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:30:40,396 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:30:40,396 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:30:40,399 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:30:40,400 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:30:40,400 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:30:40,401 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:30:40,401 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:30:40,401 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:30:40,401 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:30:40,402 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:30:40,402 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:30:40,403 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:30:40,403 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:30:40,403 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:30:40,403 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:30:40,403 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:30:40,404 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:30:40,404 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:30:40,404 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:30:40,404 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:30:40,404 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:30:40,404 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:30:40,405 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:30:40,405 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:30:40,405 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:30:40,472 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:30:40,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:30:40,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:30:40,494 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:30:40,494 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:30:40,495 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label08_false-unreach-call.c [2018-07-24 12:30:40,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47860d16/e16f838ae1584414a40dd3b1f3c99f70/FLAG22a918a4e [2018-07-24 12:30:41,260 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:30:41,261 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label08_false-unreach-call.c [2018-07-24 12:30:41,294 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47860d16/e16f838ae1584414a40dd3b1f3c99f70/FLAG22a918a4e [2018-07-24 12:30:41,318 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47860d16/e16f838ae1584414a40dd3b1f3c99f70 [2018-07-24 12:30:41,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:30:41,334 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:30:41,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:30:41,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:30:41,346 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:30:41,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:30:41" (1/1) ... [2018-07-24 12:30:41,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5186be49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:41, skipping insertion in model container [2018-07-24 12:30:41,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:30:41" (1/1) ... [2018-07-24 12:30:41,666 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:30:42,547 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:30:42,567 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:30:43,197 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:30:43,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43 WrapperNode [2018-07-24 12:30:43,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:30:43,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:30:43,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:30:43,375 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:30:43,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:43,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:43,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:30:43,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:30:43,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:30:43,577 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:30:43,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:43,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:43,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:43,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:44,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:44,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:44,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... [2018-07-24 12:30:44,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:30:44,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:30:44,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:30:44,203 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:30:44,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:30:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:30:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:30:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:30:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:30:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:30:44,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:30:44,277 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_output2 [2018-07-24 12:30:44,277 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_output2 [2018-07-24 12:30:44,277 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_output3 [2018-07-24 12:30:44,278 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_output3 [2018-07-24 12:30:44,278 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 12:30:44,278 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 12:30:52,889 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:30:52,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:30:52 BoogieIcfgContainer [2018-07-24 12:30:52,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:30:52,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:30:52,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:30:52,897 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:30:52,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:30:41" (1/3) ... [2018-07-24 12:30:52,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c7ad2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:30:52, skipping insertion in model container [2018-07-24 12:30:52,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:30:43" (2/3) ... [2018-07-24 12:30:52,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c7ad2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:30:52, skipping insertion in model container [2018-07-24 12:30:52,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:30:52" (3/3) ... [2018-07-24 12:30:52,902 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label08_false-unreach-call.c [2018-07-24 12:30:52,910 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:30:52,919 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:30:52,989 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:30:52,990 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:30:52,990 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:30:52,990 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:30:52,990 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:30:52,991 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:30:52,991 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:30:52,991 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:30:52,991 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:30:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-07-24 12:30:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-24 12:30:53,036 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:30:53,037 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:30:53,037 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 12:30:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2050424164, now seen corresponding path program 1 times [2018-07-24 12:30:53,046 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:30:53,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:53,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:53,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:53,100 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:30:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:30:53,557 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:30:53,557 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:30:53,558 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:30:53,564 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:30:53,582 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:30:53,582 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:30:53,586 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-07-24 12:31:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:31:00,168 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-07-24 12:31:00,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:31:00,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-07-24 12:31:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:31:00,202 INFO L225 Difference]: With dead ends: 2251 [2018-07-24 12:31:00,202 INFO L226 Difference]: Without dead ends: 1474 [2018-07-24 12:31:00,219 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:31:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-07-24 12:31:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-07-24 12:31:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-07-24 12:31:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2801 transitions. [2018-07-24 12:31:00,361 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2801 transitions. Word has length 28 [2018-07-24 12:31:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:31:00,362 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2801 transitions. [2018-07-24 12:31:00,362 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:31:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2801 transitions. [2018-07-24 12:31:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-24 12:31:00,372 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:00,373 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:31:00,374 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 12:31:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1339949634, now seen corresponding path program 1 times [2018-07-24 12:31:00,374 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:00,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:00,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:00,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:00,377 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:31:00,766 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:31:00,766 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:31:00,767 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:31:00,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:31:00,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:31:00,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:31:00,769 INFO L87 Difference]: Start difference. First operand 1474 states and 2801 transitions. Second operand 6 states. [2018-07-24 12:31:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:31:15,889 INFO L93 Difference]: Finished difference Result 4416 states and 8482 transitions. [2018-07-24 12:31:15,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:31:15,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2018-07-24 12:31:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:31:15,910 INFO L225 Difference]: With dead ends: 4416 [2018-07-24 12:31:15,911 INFO L226 Difference]: Without dead ends: 2948 [2018-07-24 12:31:15,916 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:31:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2018-07-24 12:31:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2922. [2018-07-24 12:31:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2922 states. [2018-07-24 12:31:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 5419 transitions. [2018-07-24 12:31:16,004 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 5419 transitions. Word has length 118 [2018-07-24 12:31:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:31:16,005 INFO L471 AbstractCegarLoop]: Abstraction has 2922 states and 5419 transitions. [2018-07-24 12:31:16,005 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:31:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 5419 transitions. [2018-07-24 12:31:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-24 12:31:16,011 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:16,011 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:31:16,012 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 12:31:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1297722551, now seen corresponding path program 1 times [2018-07-24 12:31:16,012 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:16,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:16,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:16,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:16,014 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:31:16,243 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:31:16,244 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 12:31:16,244 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:31:16,244 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:31:16,245 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:31:16,245 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:31:16,245 INFO L87 Difference]: Start difference. First operand 2922 states and 5419 transitions. Second operand 5 states. [2018-07-24 12:31:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:31:29,011 INFO L93 Difference]: Finished difference Result 10224 states and 19181 transitions. [2018-07-24 12:31:29,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:31:29,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2018-07-24 12:31:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:31:29,057 INFO L225 Difference]: With dead ends: 10224 [2018-07-24 12:31:29,057 INFO L226 Difference]: Without dead ends: 7308 [2018-07-24 12:31:29,074 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:31:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2018-07-24 12:31:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 7237. [2018-07-24 12:31:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7237 states. [2018-07-24 12:31:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7237 states to 7237 states and 11362 transitions. [2018-07-24 12:31:29,300 INFO L78 Accepts]: Start accepts. Automaton has 7237 states and 11362 transitions. Word has length 119 [2018-07-24 12:31:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:31:29,301 INFO L471 AbstractCegarLoop]: Abstraction has 7237 states and 11362 transitions. [2018-07-24 12:31:29,301 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:31:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7237 states and 11362 transitions. [2018-07-24 12:31:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-24 12:31:29,307 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:29,307 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:31:29,307 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 12:31:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1095349399, now seen corresponding path program 1 times [2018-07-24 12:31:29,308 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:29,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:29,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:29,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:29,309 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 42 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:31:29,681 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:31:29,681 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:31:29,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:29,696 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:31:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:29,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:31:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-07-24 12:31:30,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 42 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:31:30,889 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:31:30,889 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2018-07-24 12:31:30,889 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:31:30,890 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:31:30,893 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:31:30,893 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:31:30,893 INFO L87 Difference]: Start difference. First operand 7237 states and 11362 transitions. Second operand 5 states. [2018-07-24 12:31:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:31:39,255 INFO L93 Difference]: Finished difference Result 19701 states and 31490 transitions. [2018-07-24 12:31:39,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:31:39,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2018-07-24 12:31:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:31:39,317 INFO L225 Difference]: With dead ends: 19701 [2018-07-24 12:31:39,318 INFO L226 Difference]: Without dead ends: 12470 [2018-07-24 12:31:39,346 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 373 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:31:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12470 states. [2018-07-24 12:31:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12470 to 12340. [2018-07-24 12:31:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12340 states. [2018-07-24 12:31:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12340 states to 12340 states and 16253 transitions. [2018-07-24 12:31:39,854 INFO L78 Accepts]: Start accepts. Automaton has 12340 states and 16253 transitions. Word has length 189 [2018-07-24 12:31:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:31:39,855 INFO L471 AbstractCegarLoop]: Abstraction has 12340 states and 16253 transitions. [2018-07-24 12:31:39,855 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:31:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 12340 states and 16253 transitions. [2018-07-24 12:31:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-07-24 12:31:39,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:39,867 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:31:39,867 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 12:31:39,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1933532434, now seen corresponding path program 1 times [2018-07-24 12:31:39,867 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:39,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:39,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:39,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:39,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:40,302 WARN L169 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-07-24 12:31:40,759 WARN L169 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-07-24 12:31:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 136 proven. 69 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-07-24 12:31:40,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:31:40,858 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:31:40,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:40,875 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:31:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:41,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:31:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-07-24 12:31:41,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 136 proven. 69 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-07-24 12:31:42,088 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:31:42,088 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:31:42,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:42,109 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:31:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:42,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:31:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-07-24 12:31:42,536 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 136 proven. 69 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (4)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 12:31:43,043 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:31:43,044 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 14 [2018-07-24 12:31:43,044 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:31:43,045 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 12:31:43,048 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 12:31:43,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:31:43,048 INFO L87 Difference]: Start difference. First operand 12340 states and 16253 transitions. Second operand 10 states. [2018-07-24 12:31:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:31:56,380 INFO L93 Difference]: Finished difference Result 27718 states and 37675 transitions. [2018-07-24 12:31:56,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-24 12:31:56,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 312 [2018-07-24 12:31:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:31:56,444 INFO L225 Difference]: With dead ends: 27718 [2018-07-24 12:31:56,444 INFO L226 Difference]: Without dead ends: 15384 [2018-07-24 12:31:56,490 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1274 GetRequests, 1248 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:31:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2018-07-24 12:31:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 15320. [2018-07-24 12:31:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15320 states. [2018-07-24 12:31:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15320 states to 15320 states and 19523 transitions. [2018-07-24 12:31:56,828 INFO L78 Accepts]: Start accepts. Automaton has 15320 states and 19523 transitions. Word has length 312 [2018-07-24 12:31:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:31:56,829 INFO L471 AbstractCegarLoop]: Abstraction has 15320 states and 19523 transitions. [2018-07-24 12:31:56,829 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 12:31:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 15320 states and 19523 transitions. [2018-07-24 12:31:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-07-24 12:31:56,837 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:56,838 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:31:56,838 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 12:31:56,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2029152458, now seen corresponding path program 1 times [2018-07-24 12:31:56,838 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:56,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:56,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:56,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:56,840 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 140 proven. 73 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-07-24 12:31:57,553 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:31:57,553 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 12:31:57,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:57,569 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:31:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:57,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:31:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-07-24 12:31:57,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 140 proven. 73 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-07-24 12:31:58,492 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:31:58,492 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 12:31:58,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:58,509 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:31:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:58,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:31:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-07-24 12:31:58,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 140 proven. 73 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-07-24 12:31:58,927 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:31:58,928 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:31:58,928 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:31:58,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:31:58,929 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:31:58,929 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:31:58,929 INFO L87 Difference]: Start difference. First operand 15320 states and 19523 transitions. Second operand 9 states. [2018-07-24 12:32:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:10,715 INFO L93 Difference]: Finished difference Result 50427 states and 68872 transitions. [2018-07-24 12:32:10,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:32:10,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 316 [2018-07-24 12:32:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:10,863 INFO L225 Difference]: With dead ends: 50427 [2018-07-24 12:32:10,864 INFO L226 Difference]: Without dead ends: 31790 [2018-07-24 12:32:10,984 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1286 GetRequests, 1265 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:32:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31790 states. [2018-07-24 12:32:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31790 to 29749. [2018-07-24 12:32:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29749 states. [2018-07-24 12:32:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29749 states to 29749 states and 34762 transitions. [2018-07-24 12:32:11,635 INFO L78 Accepts]: Start accepts. Automaton has 29749 states and 34762 transitions. Word has length 316 [2018-07-24 12:32:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:11,636 INFO L471 AbstractCegarLoop]: Abstraction has 29749 states and 34762 transitions. [2018-07-24 12:32:11,636 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:32:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29749 states and 34762 transitions. [2018-07-24 12:32:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-07-24 12:32:11,645 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:11,646 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:32:11,646 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 12:32:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2029867639, now seen corresponding path program 1 times [2018-07-24 12:32:11,647 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:11,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:11,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:11,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:11,648 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:11,988 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:32:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 112 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-07-24 12:32:12,611 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:12,611 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:32:12,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:12,619 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:12,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:12,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:13,167 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:13,168 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:32:13,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:13,183 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:13,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:13,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:13,944 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:32:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:14,294 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:32:14,295 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 15 [2018-07-24 12:32:14,295 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:32:14,297 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:32:14,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:32:14,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:32:14,298 INFO L87 Difference]: Start difference. First operand 29749 states and 34762 transitions. Second operand 11 states. [2018-07-24 12:32:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:25,604 INFO L93 Difference]: Finished difference Result 64514 states and 75807 transitions. [2018-07-24 12:32:25,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 12:32:25,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 349 [2018-07-24 12:32:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:25,728 INFO L225 Difference]: With dead ends: 64514 [2018-07-24 12:32:25,729 INFO L226 Difference]: Without dead ends: 34859 [2018-07-24 12:32:25,816 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1424 GetRequests, 1394 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:32:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34859 states. [2018-07-24 12:32:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34859 to 29714. [2018-07-24 12:32:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29714 states. [2018-07-24 12:32:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29714 states to 29714 states and 33116 transitions. [2018-07-24 12:32:26,427 INFO L78 Accepts]: Start accepts. Automaton has 29714 states and 33116 transitions. Word has length 349 [2018-07-24 12:32:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:26,428 INFO L471 AbstractCegarLoop]: Abstraction has 29714 states and 33116 transitions. [2018-07-24 12:32:26,428 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:32:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 29714 states and 33116 transitions. [2018-07-24 12:32:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-07-24 12:32:26,444 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:26,444 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:32:26,445 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 12:32:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash -144391361, now seen corresponding path program 1 times [2018-07-24 12:32:26,445 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:26,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:26,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:26,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:26,446 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:26,927 WARN L169 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-07-24 12:32:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 152 proven. 117 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-07-24 12:32:27,493 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:27,494 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:32:27,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:27,510 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:27,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-07-24 12:32:27,878 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-07-24 12:32:28,445 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:32:28,446 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 12:32:28,446 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:32:28,447 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:32:28,447 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:32:28,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:32:28,447 INFO L87 Difference]: Start difference. First operand 29714 states and 33116 transitions. Second operand 3 states. [2018-07-24 12:32:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:31,762 INFO L93 Difference]: Finished difference Result 59329 states and 66102 transitions. [2018-07-24 12:32:31,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:32:31,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 409 [2018-07-24 12:32:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:31,859 INFO L225 Difference]: With dead ends: 59329 [2018-07-24 12:32:31,859 INFO L226 Difference]: Without dead ends: 29709 [2018-07-24 12:32:31,923 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 818 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:32:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29709 states. [2018-07-24 12:32:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29709 to 29001. [2018-07-24 12:32:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29001 states. [2018-07-24 12:32:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29001 states to 29001 states and 31880 transitions. [2018-07-24 12:32:32,376 INFO L78 Accepts]: Start accepts. Automaton has 29001 states and 31880 transitions. Word has length 409 [2018-07-24 12:32:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:32,377 INFO L471 AbstractCegarLoop]: Abstraction has 29001 states and 31880 transitions. [2018-07-24 12:32:32,377 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:32:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 29001 states and 31880 transitions. [2018-07-24 12:32:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-07-24 12:32:32,392 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:32,393 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:32:32,393 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 12:32:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash -978819982, now seen corresponding path program 1 times [2018-07-24 12:32:32,393 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:32,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:32,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:32,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:32,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:32,922 WARN L169 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-07-24 12:32:33,132 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-07-24 12:32:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 294 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:32:33,443 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:33,443 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:32:33,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:33,453 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:33,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 294 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:33,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 294 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:34,205 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:34,205 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:32:34,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:34,224 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:34,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 294 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:34,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 294 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:32:34,989 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:32:34,990 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 15 [2018-07-24 12:32:34,990 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:32:34,991 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 12:32:34,991 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 12:32:34,992 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:32:34,992 INFO L87 Difference]: Start difference. First operand 29001 states and 31880 transitions. Second operand 12 states. [2018-07-24 12:32:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:47,230 INFO L93 Difference]: Finished difference Result 72102 states and 79995 transitions. [2018-07-24 12:32:47,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-24 12:32:47,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 420 [2018-07-24 12:32:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:47,322 INFO L225 Difference]: With dead ends: 72102 [2018-07-24 12:32:47,323 INFO L226 Difference]: Without dead ends: 43112 [2018-07-24 12:32:47,388 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1740 GetRequests, 1692 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2018-07-24 12:32:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43112 states. [2018-07-24 12:32:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43112 to 37300. [2018-07-24 12:32:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37300 states. [2018-07-24 12:32:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37300 states to 37300 states and 39857 transitions. [2018-07-24 12:32:47,962 INFO L78 Accepts]: Start accepts. Automaton has 37300 states and 39857 transitions. Word has length 420 [2018-07-24 12:32:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:47,963 INFO L471 AbstractCegarLoop]: Abstraction has 37300 states and 39857 transitions. [2018-07-24 12:32:47,963 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 12:32:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37300 states and 39857 transitions. [2018-07-24 12:32:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2018-07-24 12:32:47,982 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:47,982 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:32:47,983 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 12:32:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2066299079, now seen corresponding path program 1 times [2018-07-24 12:32:47,983 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:47,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:47,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:47,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:47,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 305 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 12:32:48,945 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:48,945 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:32:48,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:48,953 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:49,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:49,852 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:32:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2018-07-24 12:32:50,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:50,211 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-07-24 12:32:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 63 proven. 236 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2018-07-24 12:32:50,941 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:32:50,941 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-07-24 12:32:50,941 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:32:50,942 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:32:50,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:32:50,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:32:50,943 INFO L87 Difference]: Start difference. First operand 37300 states and 39857 transitions. Second operand 5 states. [2018-07-24 12:32:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:56,019 INFO L93 Difference]: Finished difference Result 80188 states and 85539 transitions. [2018-07-24 12:32:56,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:32:56,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 537 [2018-07-24 12:32:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:56,088 INFO L225 Difference]: With dead ends: 80188 [2018-07-24 12:32:56,089 INFO L226 Difference]: Without dead ends: 43673 [2018-07-24 12:32:56,122 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 1069 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:32:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43673 states. [2018-07-24 12:32:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43673 to 42226. [2018-07-24 12:32:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42226 states. [2018-07-24 12:32:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42226 states to 42226 states and 44955 transitions. [2018-07-24 12:32:56,624 INFO L78 Accepts]: Start accepts. Automaton has 42226 states and 44955 transitions. Word has length 537 [2018-07-24 12:32:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:56,624 INFO L471 AbstractCegarLoop]: Abstraction has 42226 states and 44955 transitions. [2018-07-24 12:32:56,624 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:32:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 42226 states and 44955 transitions. [2018-07-24 12:32:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-07-24 12:32:56,652 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:56,653 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:32:56,653 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 12:32:56,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2062515356, now seen corresponding path program 1 times [2018-07-24 12:32:56,654 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:56,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:56,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:56,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:56,655 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 566 proven. 2 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-07-24 12:32:57,996 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:57,996 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:32:58,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:58,004 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:58,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 566 proven. 2 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-07-24 12:32:58,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 566 proven. 2 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-07-24 12:32:58,989 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:58,989 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:32:59,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:59,005 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:59,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 566 proven. 2 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-07-24 12:33:00,140 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:00,294 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:33:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 566 proven. 2 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-07-24 12:33:00,722 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:33:00,722 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-07-24 12:33:00,722 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:33:00,724 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:33:00,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:33:00,725 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:33:00,725 INFO L87 Difference]: Start difference. First operand 42226 states and 44955 transitions. Second operand 7 states. [2018-07-24 12:33:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:33:08,092 INFO L93 Difference]: Finished difference Result 100732 states and 108583 transitions. [2018-07-24 12:33:08,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:33:08,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 790 [2018-07-24 12:33:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:33:08,200 INFO L225 Difference]: With dead ends: 100732 [2018-07-24 12:33:08,200 INFO L226 Difference]: Without dead ends: 59291 [2018-07-24 12:33:08,251 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3174 GetRequests, 3159 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:33:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59291 states. [2018-07-24 12:33:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59291 to 59208. [2018-07-24 12:33:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59208 states. [2018-07-24 12:33:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59208 states to 59208 states and 63734 transitions. [2018-07-24 12:33:09,304 INFO L78 Accepts]: Start accepts. Automaton has 59208 states and 63734 transitions. Word has length 790 [2018-07-24 12:33:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:33:09,305 INFO L471 AbstractCegarLoop]: Abstraction has 59208 states and 63734 transitions. [2018-07-24 12:33:09,305 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:33:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 59208 states and 63734 transitions. [2018-07-24 12:33:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2018-07-24 12:33:09,392 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:33:09,393 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:33:09,393 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:33:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash -789022245, now seen corresponding path program 1 times [2018-07-24 12:33:09,394 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:33:09,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:09,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:09,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:09,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:33:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 611 proven. 415 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2018-07-24 12:33:10,570 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:10,570 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:33:10,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:10,578 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:10,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1081 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2018-07-24 12:33:12,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 613 proven. 161 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2018-07-24 12:33:13,316 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:13,317 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:33:13,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:13,334 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:14,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1081 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2018-07-24 12:33:14,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 613 proven. 161 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2018-07-24 12:33:16,177 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:33:16,178 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 20 [2018-07-24 12:33:16,179 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:33:16,180 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:33:16,180 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:33:16,181 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:33:16,181 INFO L87 Difference]: Start difference. First operand 59208 states and 63734 transitions. Second operand 13 states. [2018-07-24 12:33:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:33:36,699 INFO L93 Difference]: Finished difference Result 112977 states and 122151 transitions. [2018-07-24 12:33:36,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-24 12:33:36,700 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1103 [2018-07-24 12:33:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:33:36,785 INFO L225 Difference]: With dead ends: 112977 [2018-07-24 12:33:36,785 INFO L226 Difference]: Without dead ends: 48174 [2018-07-24 12:33:36,850 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4512 GetRequests, 4445 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=769, Invalid=3391, Unknown=0, NotChecked=0, Total=4160 [2018-07-24 12:33:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48174 states. [2018-07-24 12:33:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48174 to 43168. [2018-07-24 12:33:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43168 states. [2018-07-24 12:33:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43168 states to 43168 states and 45815 transitions. [2018-07-24 12:33:37,822 INFO L78 Accepts]: Start accepts. Automaton has 43168 states and 45815 transitions. Word has length 1103 [2018-07-24 12:33:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:33:37,824 INFO L471 AbstractCegarLoop]: Abstraction has 43168 states and 45815 transitions. [2018-07-24 12:33:37,825 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:33:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 43168 states and 45815 transitions. [2018-07-24 12:33:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1169 [2018-07-24 12:33:37,888 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:33:37,890 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:33:37,890 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:33:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash 145004309, now seen corresponding path program 1 times [2018-07-24 12:33:37,891 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:33:37,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:37,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:37,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:37,892 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:33:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:38,726 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-07-24 12:33:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2018-07-24 12:33:39,753 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:33:39,753 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 12:33:39,754 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:33:39,755 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:33:39,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:33:39,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:33:39,755 INFO L87 Difference]: Start difference. First operand 43168 states and 45815 transitions. Second operand 5 states. [2018-07-24 12:33:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:33:45,901 INFO L93 Difference]: Finished difference Result 96897 states and 103210 transitions. [2018-07-24 12:33:45,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 12:33:45,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1168 [2018-07-24 12:33:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:33:46,011 INFO L225 Difference]: With dead ends: 96897 [2018-07-24 12:33:46,011 INFO L226 Difference]: Without dead ends: 53066 [2018-07-24 12:33:46,053 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:33:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53066 states. [2018-07-24 12:33:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53066 to 52294. [2018-07-24 12:33:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52294 states. [2018-07-24 12:33:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52294 states to 52294 states and 55317 transitions. [2018-07-24 12:33:46,612 INFO L78 Accepts]: Start accepts. Automaton has 52294 states and 55317 transitions. Word has length 1168 [2018-07-24 12:33:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:33:46,613 INFO L471 AbstractCegarLoop]: Abstraction has 52294 states and 55317 transitions. [2018-07-24 12:33:46,613 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:33:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 52294 states and 55317 transitions. [2018-07-24 12:33:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1205 [2018-07-24 12:33:46,670 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:33:46,671 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:33:46,671 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:33:46,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1657692185, now seen corresponding path program 1 times [2018-07-24 12:33:46,672 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:33:46,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:46,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:46,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:46,673 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:33:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:47,776 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:33:48,073 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-07-24 12:33:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 698 proven. 161 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2018-07-24 12:33:51,558 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:51,558 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:33:51,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:51,566 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:51,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 723 proven. 0 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2018-07-24 12:33:52,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 126 proven. 682 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2018-07-24 12:33:54,341 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:33:54,342 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 16 [2018-07-24 12:33:54,342 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:33:54,343 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:33:54,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:33:54,344 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:33:54,344 INFO L87 Difference]: Start difference. First operand 52294 states and 55317 transitions. Second operand 5 states. [2018-07-24 12:34:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:34:00,492 INFO L93 Difference]: Finished difference Result 136031 states and 144494 transitions. [2018-07-24 12:34:00,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:34:00,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1204 [2018-07-24 12:34:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:34:00,633 INFO L225 Difference]: With dead ends: 136031 [2018-07-24 12:34:00,634 INFO L226 Difference]: Without dead ends: 83786 [2018-07-24 12:34:00,698 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2423 GetRequests, 2401 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:34:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83786 states. [2018-07-24 12:34:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83786 to 78547. [2018-07-24 12:34:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78547 states. [2018-07-24 12:34:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78547 states to 78547 states and 83030 transitions. [2018-07-24 12:34:01,571 INFO L78 Accepts]: Start accepts. Automaton has 78547 states and 83030 transitions. Word has length 1204 [2018-07-24 12:34:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:34:01,571 INFO L471 AbstractCegarLoop]: Abstraction has 78547 states and 83030 transitions. [2018-07-24 12:34:01,572 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:34:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 78547 states and 83030 transitions. [2018-07-24 12:34:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1733 [2018-07-24 12:34:01,644 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:34:01,645 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:34:01,645 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:34:01,645 INFO L82 PathProgramCache]: Analyzing trace with hash -524733787, now seen corresponding path program 1 times [2018-07-24 12:34:01,645 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:34:01,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:01,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:01,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:01,646 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:34:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:03,299 WARN L169 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-07-24 12:34:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 1196 proven. 161 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2018-07-24 12:34:07,459 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:34:07,459 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:34:07,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:07,466 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:34:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:07,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:34:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 889 proven. 2 refuted. 0 times theorem prover too weak. 1993 trivial. 0 not checked. [2018-07-24 12:34:09,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:34:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 889 proven. 2 refuted. 0 times theorem prover too weak. 1993 trivial. 0 not checked. [2018-07-24 12:34:10,845 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:34:10,845 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:34:10,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:10,861 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:34:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:12,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:34:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 881 proven. 35 refuted. 0 times theorem prover too weak. 1968 trivial. 0 not checked. [2018-07-24 12:34:13,044 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:34:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 889 proven. 2 refuted. 0 times theorem prover too weak. 1993 trivial. 0 not checked. [2018-07-24 12:34:15,006 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:34:15,008 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 21 [2018-07-24 12:34:15,008 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:34:15,010 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:34:15,010 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:34:15,011 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-07-24 12:34:15,011 INFO L87 Difference]: Start difference. First operand 78547 states and 83030 transitions. Second operand 15 states. Received shutdown request... [2018-07-24 12:34:21,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:34:21,498 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:34:21,505 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:34:21,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:34:21 BoogieIcfgContainer [2018-07-24 12:34:21,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:34:21,507 INFO L168 Benchmark]: Toolchain (without parser) took 220174.31 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 934.2 MB. Max. memory is 7.1 GB. [2018-07-24 12:34:21,508 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:34:21,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2038.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 7.1 GB. [2018-07-24 12:34:21,509 INFO L168 Benchmark]: Boogie Procedure Inliner took 201.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:34:21,509 INFO L168 Benchmark]: Boogie Preprocessor took 626.50 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 864.6 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:34:21,510 INFO L168 Benchmark]: RCFGBuilder took 8687.76 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 543.8 MB). Peak memory consumption was 543.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:34:21,511 INFO L168 Benchmark]: TraceAbstraction took 208613.95 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.2 GB). Peak memory consumption was 412.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:34:21,515 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2038.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 201.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 626.50 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 864.6 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8687.76 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 543.8 MB). Peak memory consumption was 543.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208613.95 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.2 GB). Peak memory consumption was 412.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 72). Cancelled while BasicCegarLoop was constructing difference of abstraction (78547states) and interpolant automaton (currently 8 states, 15 states before enhancement), while ReachableStatesComputation was computing reachable states (1756 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 208.5s OverallTime, 15 OverallIterations, 8 TraceHistogramMax, 148.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1582 SDtfs, 57253 SDslu, 2897 SDs, 0 SdLazy, 103274 SolverSat, 15968 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25116 GetRequests, 24796 SyntacticMatches, 52 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78547occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 26544 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 33.7s InterpolantComputationTime, 21177 NumberOfCodeBlocks, 21177 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 33509 ConstructedInterpolants, 0 QuantifiedInterpolants, 101359072 SizeOfPredicates, 11 NumberOfNonLiveVariables, 17537 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 51 InterpolantComputations, 9 PerfectInterpolantSequences, 39680/42777 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label08_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-34-21-538.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label08_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-34-21-538.csv Completed graceful shutdown