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/Problem16_label45_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:45:17,105 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:45:17,107 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:45:17,124 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:45:17,125 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:45:17,126 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:45:17,127 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:45:17,129 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:45:17,130 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:45:17,131 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:45:17,132 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:45:17,133 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:45:17,133 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:45:17,134 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:45:17,136 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:45:17,136 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:45:17,137 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:45:17,139 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:45:17,141 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:45:17,143 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:45:17,146 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:45:17,147 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:45:17,154 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:45:17,154 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:45:17,157 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:45:17,158 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:45:17,159 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:45:17,161 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:45:17,163 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:45:17,164 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:45:17,164 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:45:17,166 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:45:17,166 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:45:17,167 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:45:17,168 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:45:17,168 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:45:17,169 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 14:45:17,191 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:45:17,191 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:45:17,192 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:45:17,192 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:45:17,192 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:45:17,192 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:45:17,192 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:45:17,193 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:45:17,193 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:45:17,193 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:45:17,193 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:45:17,194 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:45:17,194 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:45:17,194 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:45:17,194 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:45:17,195 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:45:17,195 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:45:17,195 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:45:17,195 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:45:17,195 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:45:17,195 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:45:17,196 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:45:17,196 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:45:17,196 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:45:17,196 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:45:17,196 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:45:17,197 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:45:17,197 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:45:17,197 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:45:17,197 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:45:17,197 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:45:17,198 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:45:17,198 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:45:17,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:45:17,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:45:17,272 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:45:17,274 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:45:17,274 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:45:17,275 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label45_true-unreach-call.c [2018-07-24 14:45:17,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a582e4b/a1280ad64eeb46c192a115cda8baba06/FLAGa7d0ffafe [2018-07-24 14:45:17,967 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:45:17,968 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label45_true-unreach-call.c [2018-07-24 14:45:17,992 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a582e4b/a1280ad64eeb46c192a115cda8baba06/FLAGa7d0ffafe [2018-07-24 14:45:18,012 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a582e4b/a1280ad64eeb46c192a115cda8baba06 [2018-07-24 14:45:18,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:45:18,026 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:45:18,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:45:18,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:45:18,034 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:45:18,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:45:18" (1/1) ... [2018-07-24 14:45:18,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ac42f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:18, skipping insertion in model container [2018-07-24 14:45:18,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:45:18" (1/1) ... [2018-07-24 14:45:18,299 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:45:18,819 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:45:18,840 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:45:19,228 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:45:19,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19 WrapperNode [2018-07-24 14:45:19,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:45:19,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:45:19,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:45:19,340 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:45:19,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:45:19,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:45:19,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:45:19,535 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:45:19,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (1/1) ... [2018-07-24 14:45:19,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:45:19,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:45:19,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:45:19,993 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:45:19,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (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 14:45:20,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:45:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:45:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:45:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:45:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:45:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:45:20,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:45:26,430 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:45:26,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:45:26 BoogieIcfgContainer [2018-07-24 14:45:26,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:45:26,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:45:26,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:45:26,435 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:45:26,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:45:18" (1/3) ... [2018-07-24 14:45:26,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc86b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:45:26, skipping insertion in model container [2018-07-24 14:45:26,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:45:19" (2/3) ... [2018-07-24 14:45:26,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc86b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:45:26, skipping insertion in model container [2018-07-24 14:45:26,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:45:26" (3/3) ... [2018-07-24 14:45:26,439 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label45_true-unreach-call.c [2018-07-24 14:45:26,446 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:45:26,455 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:45:26,508 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:45:26,509 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:45:26,510 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:45:26,510 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:45:26,510 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:45:26,510 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:45:26,510 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:45:26,510 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:45:26,511 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:45:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 14:45:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-24 14:45:26,560 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:26,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:26,561 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1560117220, now seen corresponding path program 1 times [2018-07-24 14:45:26,570 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:26,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:26,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:26,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:26,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:27,065 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:45:27,102 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 14:45:27,105 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:45:27,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:45:27,105 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:45:27,111 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:45:27,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:45:27,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:45:27,131 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 14:45:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:31,466 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-07-24 14:45:31,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:45:31,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2018-07-24 14:45:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:31,496 INFO L225 Difference]: With dead ends: 1156 [2018-07-24 14:45:31,496 INFO L226 Difference]: Without dead ends: 744 [2018-07-24 14:45:31,505 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:45:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-07-24 14:45:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-07-24 14:45:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 14:45:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1343 transitions. [2018-07-24 14:45:31,635 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1343 transitions. Word has length 60 [2018-07-24 14:45:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:31,636 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1343 transitions. [2018-07-24 14:45:31,636 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:45:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1343 transitions. [2018-07-24 14:45:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-24 14:45:31,646 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:31,647 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:45:31,647 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1772371123, now seen corresponding path program 1 times [2018-07-24 14:45:31,648 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:31,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:31,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:31,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:31,649 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:45:31,924 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:45:31,924 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:45:31,924 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:45:31,926 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:45:31,927 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:45:31,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:45:31,927 INFO L87 Difference]: Start difference. First operand 744 states and 1343 transitions. Second operand 6 states. [2018-07-24 14:45:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:38,577 INFO L93 Difference]: Finished difference Result 2192 states and 4029 transitions. [2018-07-24 14:45:38,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:45:38,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-07-24 14:45:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:38,593 INFO L225 Difference]: With dead ends: 2192 [2018-07-24 14:45:38,593 INFO L226 Difference]: Without dead ends: 1454 [2018-07-24 14:45:38,598 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 14:45:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2018-07-24 14:45:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1444. [2018-07-24 14:45:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2018-07-24 14:45:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2400 transitions. [2018-07-24 14:45:38,674 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2400 transitions. Word has length 133 [2018-07-24 14:45:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:38,675 INFO L471 AbstractCegarLoop]: Abstraction has 1444 states and 2400 transitions. [2018-07-24 14:45:38,675 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:45:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2400 transitions. [2018-07-24 14:45:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-07-24 14:45:38,686 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:38,686 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:45:38,687 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -87420099, now seen corresponding path program 1 times [2018-07-24 14:45:38,687 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:38,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:38,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:38,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:38,690 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:45:39,043 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:45:39,043 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:45:39,043 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:45:39,044 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:45:39,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:45:39,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:45:39,045 INFO L87 Difference]: Start difference. First operand 1444 states and 2400 transitions. Second operand 6 states. [2018-07-24 14:45:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:46,940 INFO L93 Difference]: Finished difference Result 3942 states and 6538 transitions. [2018-07-24 14:45:46,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:45:46,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 205 [2018-07-24 14:45:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:46,968 INFO L225 Difference]: With dead ends: 3942 [2018-07-24 14:45:46,968 INFO L226 Difference]: Without dead ends: 2504 [2018-07-24 14:45:46,977 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:45:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2018-07-24 14:45:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2485. [2018-07-24 14:45:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2485 states. [2018-07-24 14:45:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 3808 transitions. [2018-07-24 14:45:47,068 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 3808 transitions. Word has length 205 [2018-07-24 14:45:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:47,069 INFO L471 AbstractCegarLoop]: Abstraction has 2485 states and 3808 transitions. [2018-07-24 14:45:47,069 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:45:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 3808 transitions. [2018-07-24 14:45:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-07-24 14:45:47,076 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:47,077 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:45:47,077 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1153390021, now seen corresponding path program 1 times [2018-07-24 14:45:47,078 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:47,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:47,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:47,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:47,079 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:47,349 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:45:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:45:47,744 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:47,744 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 14:45:47,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:47,766 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:47,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 14:45:48,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:45:49,202 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:45:49,202 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:45:49,202 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:45:49,203 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:45:49,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:45:49,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:45:49,204 INFO L87 Difference]: Start difference. First operand 2485 states and 3808 transitions. Second operand 5 states. [2018-07-24 14:45:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:57,937 INFO L93 Difference]: Finished difference Result 6617 states and 10172 transitions. [2018-07-24 14:45:57,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:45:57,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2018-07-24 14:45:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:57,964 INFO L225 Difference]: With dead ends: 6617 [2018-07-24 14:45:57,964 INFO L226 Difference]: Without dead ends: 4138 [2018-07-24 14:45:57,978 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 493 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:45:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2018-07-24 14:45:58,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 4119. [2018-07-24 14:45:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4119 states. [2018-07-24 14:45:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 5851 transitions. [2018-07-24 14:45:58,091 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 5851 transitions. Word has length 249 [2018-07-24 14:45:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:58,092 INFO L471 AbstractCegarLoop]: Abstraction has 4119 states and 5851 transitions. [2018-07-24 14:45:58,092 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:45:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 5851 transitions. [2018-07-24 14:45:58,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-07-24 14:45:58,101 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:58,101 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:45:58,102 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash 190429622, now seen corresponding path program 1 times [2018-07-24 14:45:58,102 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:58,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:58,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:58,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:58,104 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 14:45:58,668 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:58,668 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 14:45:58,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:58,681 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:58,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 14:45:59,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 14:45:59,579 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:45:59,579 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2018-07-24 14:45:59,579 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:45:59,580 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:45:59,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:45:59,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:45:59,581 INFO L87 Difference]: Start difference. First operand 4119 states and 5851 transitions. Second operand 4 states. [2018-07-24 14:46:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:03,344 INFO L93 Difference]: Finished difference Result 11872 states and 17468 transitions. [2018-07-24 14:46:03,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:46:03,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 300 [2018-07-24 14:46:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:03,403 INFO L225 Difference]: With dead ends: 11872 [2018-07-24 14:46:03,404 INFO L226 Difference]: Without dead ends: 7759 [2018-07-24 14:46:03,449 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 599 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:46:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2018-07-24 14:46:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 7759. [2018-07-24 14:46:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7759 states. [2018-07-24 14:46:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 10882 transitions. [2018-07-24 14:46:03,655 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 10882 transitions. Word has length 300 [2018-07-24 14:46:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:03,655 INFO L471 AbstractCegarLoop]: Abstraction has 7759 states and 10882 transitions. [2018-07-24 14:46:03,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:46:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 10882 transitions. [2018-07-24 14:46:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-07-24 14:46:03,675 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:03,676 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:46:03,676 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash -277320712, now seen corresponding path program 1 times [2018-07-24 14:46:03,676 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:03,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:03,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:03,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:03,678 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:04,014 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:46:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 106 proven. 131 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:46:04,531 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:04,532 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:46:04,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:04,550 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:04,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 14:46:05,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 106 proven. 131 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:46:05,527 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:46:05,528 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:46:05,528 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:46:05,529 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:46:05,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:46:05,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:46:05,530 INFO L87 Difference]: Start difference. First operand 7759 states and 10882 transitions. Second operand 5 states. [2018-07-24 14:46:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:09,168 INFO L93 Difference]: Finished difference Result 17969 states and 25654 transitions. [2018-07-24 14:46:09,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:46:09,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2018-07-24 14:46:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:09,225 INFO L225 Difference]: With dead ends: 17969 [2018-07-24 14:46:09,225 INFO L226 Difference]: Without dead ends: 10216 [2018-07-24 14:46:09,269 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 714 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:46:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10216 states. [2018-07-24 14:46:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10216 to 9823. [2018-07-24 14:46:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9823 states. [2018-07-24 14:46:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9823 states to 9823 states and 13021 transitions. [2018-07-24 14:46:09,514 INFO L78 Accepts]: Start accepts. Automaton has 9823 states and 13021 transitions. Word has length 360 [2018-07-24 14:46:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:09,515 INFO L471 AbstractCegarLoop]: Abstraction has 9823 states and 13021 transitions. [2018-07-24 14:46:09,515 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:46:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9823 states and 13021 transitions. [2018-07-24 14:46:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2018-07-24 14:46:09,559 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:09,560 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:46:09,560 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash 355706370, now seen corresponding path program 1 times [2018-07-24 14:46:09,561 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:09,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:09,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:09,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:09,562 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 389 proven. 29 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-07-24 14:46:10,511 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:10,511 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 14:46:10,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:10,528 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:10,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:46:11,143 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:46:11,588 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:11,588 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 14:46:11,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:11,604 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:11,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 389 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 14:46:12,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 391 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 14:46:13,409 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:46:13,410 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:46:13,410 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:46:13,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:46:13,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:46:13,411 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:46:13,412 INFO L87 Difference]: Start difference. First operand 9823 states and 13021 transitions. Second operand 9 states. [2018-07-24 14:46:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:20,232 INFO L93 Difference]: Finished difference Result 24424 states and 33160 transitions. [2018-07-24 14:46:20,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 14:46:20,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 544 [2018-07-24 14:46:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:20,305 INFO L225 Difference]: With dead ends: 24424 [2018-07-24 14:46:20,305 INFO L226 Difference]: Without dead ends: 14607 [2018-07-24 14:46:20,372 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2197 GetRequests, 2173 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:46:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14607 states. [2018-07-24 14:46:20,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14607 to 14103. [2018-07-24 14:46:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14103 states. [2018-07-24 14:46:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14103 states to 14103 states and 17543 transitions. [2018-07-24 14:46:20,701 INFO L78 Accepts]: Start accepts. Automaton has 14103 states and 17543 transitions. Word has length 544 [2018-07-24 14:46:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:20,702 INFO L471 AbstractCegarLoop]: Abstraction has 14103 states and 17543 transitions. [2018-07-24 14:46:20,703 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:46:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 14103 states and 17543 transitions. [2018-07-24 14:46:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2018-07-24 14:46:20,748 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:20,749 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:46:20,749 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1686182037, now seen corresponding path program 1 times [2018-07-24 14:46:20,750 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:20,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:20,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:20,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:20,751 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 336 proven. 141 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-07-24 14:46:21,777 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:21,777 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 14:46:21,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:21,785 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:21,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 508 proven. 2 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-07-24 14:46:22,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 336 proven. 141 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-07-24 14:46:22,624 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:22,624 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 14:46:22,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:22,640 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:23,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 508 proven. 2 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-07-24 14:46:23,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 336 proven. 141 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-07-24 14:46:23,669 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:46:23,670 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:46:23,670 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:46:23,671 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:46:23,671 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:46:23,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:46:23,672 INFO L87 Difference]: Start difference. First operand 14103 states and 17543 transitions. Second operand 9 states. [2018-07-24 14:46:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:30,271 INFO L93 Difference]: Finished difference Result 31819 states and 41900 transitions. [2018-07-24 14:46:30,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:46:30,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 571 [2018-07-24 14:46:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:30,382 INFO L225 Difference]: With dead ends: 31819 [2018-07-24 14:46:30,382 INFO L226 Difference]: Without dead ends: 17749 [2018-07-24 14:46:30,459 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2304 GetRequests, 2282 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:46:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17749 states. [2018-07-24 14:46:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17749 to 17714. [2018-07-24 14:46:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17714 states. [2018-07-24 14:46:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17714 states to 17714 states and 22266 transitions. [2018-07-24 14:46:30,896 INFO L78 Accepts]: Start accepts. Automaton has 17714 states and 22266 transitions. Word has length 571 [2018-07-24 14:46:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:30,897 INFO L471 AbstractCegarLoop]: Abstraction has 17714 states and 22266 transitions. [2018-07-24 14:46:30,897 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:46:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 17714 states and 22266 transitions. [2018-07-24 14:46:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2018-07-24 14:46:30,944 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:30,944 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:46:30,945 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash 202727997, now seen corresponding path program 1 times [2018-07-24 14:46:30,945 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:30,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:30,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:30,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:30,946 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:31,685 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:46:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 157 proven. 324 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 14:46:32,617 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:32,617 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 14:46:32,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:32,624 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:32,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-07-24 14:46:33,108 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-07-24 14:46:33,368 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:46:33,369 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 14:46:33,369 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:46:33,372 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:46:33,372 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:46:33,372 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:46:33,373 INFO L87 Difference]: Start difference. First operand 17714 states and 22266 transitions. Second operand 3 states. [2018-07-24 14:46:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:36,957 INFO L93 Difference]: Finished difference Result 35395 states and 44483 transitions. [2018-07-24 14:46:36,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:46:36,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 643 [2018-07-24 14:46:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:37,024 INFO L225 Difference]: With dead ends: 35395 [2018-07-24 14:46:37,024 INFO L226 Difference]: Without dead ends: 17714 [2018-07-24 14:46:37,089 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1297 GetRequests, 1286 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:46:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2018-07-24 14:46:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 17636. [2018-07-24 14:46:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17636 states. [2018-07-24 14:46:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17636 states to 17636 states and 21228 transitions. [2018-07-24 14:46:37,443 INFO L78 Accepts]: Start accepts. Automaton has 17636 states and 21228 transitions. Word has length 643 [2018-07-24 14:46:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:37,444 INFO L471 AbstractCegarLoop]: Abstraction has 17636 states and 21228 transitions. [2018-07-24 14:46:37,444 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:46:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 17636 states and 21228 transitions. [2018-07-24 14:46:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2018-07-24 14:46:37,477 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:37,478 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:46:37,478 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash 685583610, now seen corresponding path program 1 times [2018-07-24 14:46:37,478 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:37,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:37,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:37,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:37,480 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-07-24 14:46:38,434 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:38,434 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 14:46:38,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:38,454 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:38,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-07-24 14:46:38,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-07-24 14:46:39,276 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:39,276 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 14:46:39,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:39,293 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:39,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-07-24 14:46:39,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-07-24 14:46:40,205 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:46:40,206 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 14 [2018-07-24 14:46:40,206 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:46:40,210 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:46:40,210 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:46:40,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:46:40,211 INFO L87 Difference]: Start difference. First operand 17636 states and 21228 transitions. Second operand 9 states. [2018-07-24 14:46:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:48,678 INFO L93 Difference]: Finished difference Result 59932 states and 78170 transitions. [2018-07-24 14:46:48,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:46:48,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 660 [2018-07-24 14:46:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:48,926 INFO L225 Difference]: With dead ends: 59932 [2018-07-24 14:46:48,926 INFO L226 Difference]: Without dead ends: 28220 [2018-07-24 14:46:49,167 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2658 GetRequests, 2636 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:46:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28220 states. [2018-07-24 14:46:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28220 to 27406. [2018-07-24 14:46:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27406 states. [2018-07-24 14:46:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27406 states to 27406 states and 31896 transitions. [2018-07-24 14:46:50,015 INFO L78 Accepts]: Start accepts. Automaton has 27406 states and 31896 transitions. Word has length 660 [2018-07-24 14:46:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:50,016 INFO L471 AbstractCegarLoop]: Abstraction has 27406 states and 31896 transitions. [2018-07-24 14:46:50,016 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:46:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 27406 states and 31896 transitions. [2018-07-24 14:46:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2018-07-24 14:46:50,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:50,048 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:46:50,048 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1674836197, now seen corresponding path program 1 times [2018-07-24 14:46:50,049 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:50,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:50,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:50,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:50,050 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-07-24 14:46:51,263 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:51,263 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 14:46:51,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:51,272 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:51,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-07-24 14:46:52,004 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-07-24 14:46:52,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:52,858 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:46:52,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:52,873 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:53,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-07-24 14:46:53,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-07-24 14:46:54,293 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:46:54,294 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-07-24 14:46:54,294 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:46:54,296 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:46:54,296 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:46:54,296 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:46:54,297 INFO L87 Difference]: Start difference. First operand 27406 states and 31896 transitions. Second operand 9 states. [2018-07-24 14:46:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:59,772 INFO L93 Difference]: Finished difference Result 58694 states and 67332 transitions. [2018-07-24 14:46:59,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:46:59,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 951 [2018-07-24 14:46:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:59,873 INFO L225 Difference]: With dead ends: 58694 [2018-07-24 14:46:59,873 INFO L226 Difference]: Without dead ends: 23989 [2018-07-24 14:47:00,063 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3824 GetRequests, 3801 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:47:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23989 states. [2018-07-24 14:47:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23989 to 23471. [2018-07-24 14:47:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23471 states. [2018-07-24 14:47:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23471 states to 23471 states and 25345 transitions. [2018-07-24 14:47:00,502 INFO L78 Accepts]: Start accepts. Automaton has 23471 states and 25345 transitions. Word has length 951 [2018-07-24 14:47:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:47:00,504 INFO L471 AbstractCegarLoop]: Abstraction has 23471 states and 25345 transitions. [2018-07-24 14:47:00,504 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:47:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 23471 states and 25345 transitions. [2018-07-24 14:47:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2018-07-24 14:47:00,534 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:47:00,534 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:47:00,535 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:47:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash -3579083, now seen corresponding path program 1 times [2018-07-24 14:47:00,535 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:47:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:00,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:00,537 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:47:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 732 proven. 285 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2018-07-24 14:47:04,557 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:04,557 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:47:04,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:04,566 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:04,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-07-24 14:47:05,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-07-24 14:47:06,315 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:06,316 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:47:06,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:06,332 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:07,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-07-24 14:47:07,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-07-24 14:47:08,337 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:47:08,338 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 21 [2018-07-24 14:47:08,338 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:47:08,339 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 14:47:08,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 14:47:08,339 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:47:08,340 INFO L87 Difference]: Start difference. First operand 23471 states and 25345 transitions. Second operand 15 states. [2018-07-24 14:47:14,317 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-07-24 14:47:15,557 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-07-24 14:47:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:47:18,068 INFO L93 Difference]: Finished difference Result 48274 states and 53526 transitions. [2018-07-24 14:47:18,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 14:47:18,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1069 [2018-07-24 14:47:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:47:18,162 INFO L225 Difference]: With dead ends: 48274 [2018-07-24 14:47:18,162 INFO L226 Difference]: Without dead ends: 24814 [2018-07-24 14:47:18,227 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4348 GetRequests, 4291 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=656, Invalid=2536, Unknown=0, NotChecked=0, Total=3192 [2018-07-24 14:47:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24814 states. [2018-07-24 14:47:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24814 to 23382. [2018-07-24 14:47:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23382 states. [2018-07-24 14:47:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23382 states to 23382 states and 24828 transitions. [2018-07-24 14:47:18,707 INFO L78 Accepts]: Start accepts. Automaton has 23382 states and 24828 transitions. Word has length 1069 [2018-07-24 14:47:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:47:18,709 INFO L471 AbstractCegarLoop]: Abstraction has 23382 states and 24828 transitions. [2018-07-24 14:47:18,709 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 14:47:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 23382 states and 24828 transitions. [2018-07-24 14:47:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1246 [2018-07-24 14:47:18,746 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:47:18,747 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:47:18,748 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:47:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1779460833, now seen corresponding path program 1 times [2018-07-24 14:47:18,748 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:47:18,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:18,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:18,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:18,749 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:47:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 598 proven. 449 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2018-07-24 14:47:20,824 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:20,824 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:47:20,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:20,841 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:21,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1829 proven. 2 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2018-07-24 14:47:22,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 598 proven. 449 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2018-07-24 14:47:22,799 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:22,800 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:47:22,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:22,817 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:23,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1829 proven. 2 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2018-07-24 14:47:24,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 598 proven. 449 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2018-07-24 14:47:25,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:47:25,058 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:47:25,058 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:47:25,059 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:47:25,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:47:25,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:47:25,060 INFO L87 Difference]: Start difference. First operand 23382 states and 24828 transitions. Second operand 9 states. [2018-07-24 14:47:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:47:28,127 INFO L93 Difference]: Finished difference Result 42496 states and 44836 transitions. [2018-07-24 14:47:28,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:47:28,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1245 [2018-07-24 14:47:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:47:28,170 INFO L225 Difference]: With dead ends: 42496 [2018-07-24 14:47:28,171 INFO L226 Difference]: Without dead ends: 21198 [2018-07-24 14:47:28,210 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4996 GetRequests, 4976 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:47:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21198 states. [2018-07-24 14:47:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21198 to 17974. [2018-07-24 14:47:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17974 states. [2018-07-24 14:47:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17974 states to 17974 states and 18627 transitions. [2018-07-24 14:47:28,515 INFO L78 Accepts]: Start accepts. Automaton has 17974 states and 18627 transitions. Word has length 1245 [2018-07-24 14:47:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:47:28,516 INFO L471 AbstractCegarLoop]: Abstraction has 17974 states and 18627 transitions. [2018-07-24 14:47:28,516 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:47:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 17974 states and 18627 transitions. [2018-07-24 14:47:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2018-07-24 14:47:28,545 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:47:28,546 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:47:28,546 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:47:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1046593722, now seen corresponding path program 1 times [2018-07-24 14:47:28,546 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:47:28,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:28,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:28,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:28,548 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:47:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 371 proven. 905 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-07-24 14:47:30,073 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:30,073 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 14:47:30,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:30,084 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:30,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 982 proven. 0 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2018-07-24 14:47:31,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 371 proven. 905 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-07-24 14:47:34,354 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:47:34,355 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-07-24 14:47:34,355 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:47:34,356 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:47:34,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:47:34,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:47:34,357 INFO L87 Difference]: Start difference. First operand 17974 states and 18627 transitions. Second operand 6 states. [2018-07-24 14:47:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:47:38,931 INFO L93 Difference]: Finished difference Result 36816 states and 38138 transitions. [2018-07-24 14:47:38,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:47:38,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1246 [2018-07-24 14:47:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:47:38,960 INFO L225 Difference]: With dead ends: 36816 [2018-07-24 14:47:38,961 INFO L226 Difference]: Without dead ends: 18853 [2018-07-24 14:47:38,981 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2501 GetRequests, 2487 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:47:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18853 states. [2018-07-24 14:47:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18853 to 18600. [2018-07-24 14:47:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18600 states. [2018-07-24 14:47:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18600 states to 18600 states and 19252 transitions. [2018-07-24 14:47:39,238 INFO L78 Accepts]: Start accepts. Automaton has 18600 states and 19252 transitions. Word has length 1246 [2018-07-24 14:47:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:47:39,239 INFO L471 AbstractCegarLoop]: Abstraction has 18600 states and 19252 transitions. [2018-07-24 14:47:39,239 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:47:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 18600 states and 19252 transitions. [2018-07-24 14:47:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1487 [2018-07-24 14:47:39,269 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:47:39,270 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:47:39,270 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:47:39,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1339952544, now seen corresponding path program 1 times [2018-07-24 14:47:39,271 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:47:39,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:39,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:39,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:39,272 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:47:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 472 proven. 2022 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-07-24 14:47:43,807 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:43,807 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:47:43,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:43,817 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:44,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 1961 proven. 2 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2018-07-24 14:47:45,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 457 proven. 1800 refuted. 0 times theorem prover too weak. 1972 trivial. 0 not checked. [2018-07-24 14:47:48,879 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:48,880 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:47:48,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:48,905 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:49,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 2198 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2018-07-24 14:47:51,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 692 proven. 919 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-07-24 14:47:55,043 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:47:55,045 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 5] total 24 [2018-07-24 14:47:55,045 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:47:55,047 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 14:47:55,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 14:47:55,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:47:55,047 INFO L87 Difference]: Start difference. First operand 18600 states and 19252 transitions. Second operand 16 states. [2018-07-24 14:48:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:48:10,124 INFO L93 Difference]: Finished difference Result 44563 states and 46128 transitions. [2018-07-24 14:48:10,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 14:48:10,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1486 [2018-07-24 14:48:10,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:48:10,170 INFO L225 Difference]: With dead ends: 44563 [2018-07-24 14:48:10,170 INFO L226 Difference]: Without dead ends: 26983 [2018-07-24 14:48:10,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6027 GetRequests, 5957 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=651, Invalid=2541, Unknown=0, NotChecked=0, Total=3192 [2018-07-24 14:48:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26983 states. [2018-07-24 14:48:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26983 to 25448. [2018-07-24 14:48:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25448 states. [2018-07-24 14:48:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25448 states to 25448 states and 26295 transitions. [2018-07-24 14:48:10,486 INFO L78 Accepts]: Start accepts. Automaton has 25448 states and 26295 transitions. Word has length 1486 [2018-07-24 14:48:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:48:10,486 INFO L471 AbstractCegarLoop]: Abstraction has 25448 states and 26295 transitions. [2018-07-24 14:48:10,486 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 14:48:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25448 states and 26295 transitions. [2018-07-24 14:48:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1495 [2018-07-24 14:48:10,518 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:48:10,519 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:48:10,519 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:48:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash 158972880, now seen corresponding path program 1 times [2018-07-24 14:48:10,520 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:48:10,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:48:10,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:48:10,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:48:10,521 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:48:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:48:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 791 proven. 449 refuted. 0 times theorem prover too weak. 3005 trivial. 0 not checked. [2018-07-24 14:48:12,365 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:48:12,365 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:48:12,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:48:12,375 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:48:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:48:12,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:48:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 2210 proven. 6 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2018-07-24 14:48:14,287 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:48:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 455 proven. 2055 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-07-24 14:48:18,653 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:48:18,654 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:48:18,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:48:18,669 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:48:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:48:19,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:48:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 2752 proven. 2 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-07-24 14:48:20,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:48:20,951 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:48:21,102 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:48:21,522 WARN L169 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-07-24 14:48:21,641 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 14:48:22,458 WARN L169 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 14:48:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 791 proven. 449 refuted. 0 times theorem prover too weak. 3005 trivial. 0 not checked. [2018-07-24 14:48:23,979 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:48:23,981 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8, 5, 5] total 18 [2018-07-24 14:48:23,981 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:48:23,983 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 14:48:23,983 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 14:48:23,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:48:23,983 INFO L87 Difference]: Start difference. First operand 25448 states and 26295 transitions. Second operand 10 states. [2018-07-24 14:48:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:48:33,239 INFO L93 Difference]: Finished difference Result 54715 states and 56591 transitions. [2018-07-24 14:48:33,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-24 14:48:33,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1494 [2018-07-24 14:48:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:48:33,281 INFO L225 Difference]: With dead ends: 54715 [2018-07-24 14:48:33,281 INFO L226 Difference]: Without dead ends: 29613 [2018-07-24 14:48:33,306 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6007 GetRequests, 5971 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 14:48:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29613 states. [2018-07-24 14:48:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29613 to 27830. [2018-07-24 14:48:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27830 states. [2018-07-24 14:48:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27830 states to 27830 states and 28754 transitions. [2018-07-24 14:48:33,616 INFO L78 Accepts]: Start accepts. Automaton has 27830 states and 28754 transitions. Word has length 1494 [2018-07-24 14:48:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:48:33,617 INFO L471 AbstractCegarLoop]: Abstraction has 27830 states and 28754 transitions. [2018-07-24 14:48:33,617 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 14:48:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 27830 states and 28754 transitions. [2018-07-24 14:48:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1622 [2018-07-24 14:48:33,646 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:48:33,647 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:48:33,647 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:48:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash 294142677, now seen corresponding path program 1 times [2018-07-24 14:48:33,648 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:48:33,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:48:33,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:48:33,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:48:33,649 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:48:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:48:35,388 WARN L169 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 14:48:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 2753 proven. 61 refuted. 0 times theorem prover too weak. 2747 trivial. 0 not checked. [2018-07-24 14:48:37,885 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:48:37,885 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:48:37,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:48:37,894 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:48:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:48:38,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:48:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 2761 proven. 2 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2018-07-24 14:48:39,649 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:48:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 1670 proven. 170 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2018-07-24 14:48:44,091 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:48:44,091 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:48:44,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:48:44,108 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:48:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:48:45,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:48:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 2761 proven. 26 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2018-07-24 14:48:46,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:48:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 1670 proven. 170 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2018-07-24 14:48:50,670 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:48:50,671 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 6, 5] total 22 [2018-07-24 14:48:50,671 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:48:50,673 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 14:48:50,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 14:48:50,674 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:48:50,674 INFO L87 Difference]: Start difference. First operand 27830 states and 28754 transitions. Second operand 16 states. [2018-07-24 14:48:57,143 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 Received shutdown request... [2018-07-24 14:49:03,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-24 14:49:03,648 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:49:03,652 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:49:03,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:49:03 BoogieIcfgContainer [2018-07-24 14:49:03,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:49:03,653 INFO L168 Benchmark]: Toolchain (without parser) took 225627.31 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-07-24 14:49:03,654 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 14:49:03,654 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1311.38 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:49:03,655 INFO L168 Benchmark]: Boogie Procedure Inliner took 194.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 14:49:03,655 INFO L168 Benchmark]: Boogie Preprocessor took 457.58 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 841.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -976.9 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:49:03,656 INFO L168 Benchmark]: RCFGBuilder took 6439.24 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 268.3 MB). Peak memory consumption was 268.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:49:03,657 INFO L168 Benchmark]: TraceAbstraction took 217220.23 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 788.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:49:03,661 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 1311.38 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 194.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 457.58 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 841.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -976.9 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6439.24 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 268.3 MB). Peak memory consumption was 268.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217220.23 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 788.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 166]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 166). Cancelled while BasicCegarLoop was constructing difference of abstraction (27830states) and interpolant automaton (currently 29 states, 16 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 44 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 217.1s OverallTime, 17 OverallIterations, 10 TraceHistogramMax, 122.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2105 SDtfs, 37449 SDslu, 3133 SDs, 0 SdLazy, 71190 SolverSat, 10186 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 94.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44565 GetRequests, 44164 SyntacticMatches, 69 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 19.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27830occurred in iteration=16, 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: 4.8s AutomataMinimizationTime, 16 MinimizatonAttempts, 10617 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 10.2s SatisfiabilityAnalysisTime, 63.9s InterpolantComputationTime, 34917 NumberOfCodeBlocks, 34917 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 56934 ConstructedInterpolants, 0 QuantifiedInterpolants, 218167636 SizeOfPredicates, 35 NumberOfNonLiveVariables, 29089 ConjunctsInSsa, 226 ConjunctsInUnsatCore, 63 InterpolantComputations, 9 PerfectInterpolantSequences, 109019/121918 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/Problem16_label45_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-49-03-673.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label45_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-49-03-673.csv Completed graceful shutdown