java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label01_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:28:31,668 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:28:31,670 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:28:31,682 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:28:31,682 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:28:31,683 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:28:31,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:28:31,687 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:28:31,688 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:28:31,689 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:28:31,690 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:28:31,690 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:28:31,691 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:28:31,692 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:28:31,693 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:28:31,694 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:28:31,695 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:28:31,697 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:28:31,699 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:28:31,701 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:28:31,702 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:28:31,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:28:31,705 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:28:31,706 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:28:31,706 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:28:31,707 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:28:31,708 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:28:31,709 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:28:31,710 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:28:31,711 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:28:31,711 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:28:31,712 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:28:31,712 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:28:31,712 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:28:31,713 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:28:31,714 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:28:31,714 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:28:31,739 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:28:31,739 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:28:31,740 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:28:31,740 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:28:31,740 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:28:31,740 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:28:31,741 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:28:31,741 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:28:31,741 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:28:31,741 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:28:31,741 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:28:31,742 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:28:31,742 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:28:31,742 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:28:31,743 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:28:31,743 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:28:31,743 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:28:31,743 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:28:31,743 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:28:31,744 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:28:31,744 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:28:31,744 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:28:31,744 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:28:31,744 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:28:31,745 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:28:31,745 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:28:31,745 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:28:31,745 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:28:31,745 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:28:31,745 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:28:31,746 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:28:31,746 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:28:31,746 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:28:31,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:28:31,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:28:31,807 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:28:31,809 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:28:31,809 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:28:31,810 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label01_false-unreach-call.c [2018-07-24 12:28:32,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2302f308/b1a8befe43294c7e9581717f6c465a68/FLAGa82793bc0 [2018-07-24 12:28:32,574 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:28:32,575 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label01_false-unreach-call.c [2018-07-24 12:28:32,606 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2302f308/b1a8befe43294c7e9581717f6c465a68/FLAGa82793bc0 [2018-07-24 12:28:32,627 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2302f308/b1a8befe43294c7e9581717f6c465a68 [2018-07-24 12:28:32,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:28:32,642 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:28:32,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:28:32,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:28:32,655 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:28:32,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:28:32" (1/1) ... [2018-07-24 12:28:32,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a59828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:32, skipping insertion in model container [2018-07-24 12:28:32,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:28:32" (1/1) ... [2018-07-24 12:28:33,014 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:28:33,901 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:28:33,917 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:28:34,503 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:28:34,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34 WrapperNode [2018-07-24 12:28:34,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:28:34,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:28:34,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:28:34,649 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:28:34,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:34,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:34,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:28:34,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:28:34,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:28:34,830 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:28:35,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:35,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:35,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:35,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:35,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:35,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:35,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... [2018-07-24 12:28:35,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:28:35,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:28:35,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:28:35,513 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:28:35,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:28:35,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:28:35,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:28:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:28:35,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:28:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:28:35,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:28:35,586 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:28:35,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:28:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output3 [2018-07-24 12:28:35,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output3 [2018-07-24 12:28:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:28:35,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:28:43,960 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:28:43,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:28:43 BoogieIcfgContainer [2018-07-24 12:28:43,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:28:43,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:28:43,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:28:43,968 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:28:43,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:28:32" (1/3) ... [2018-07-24 12:28:43,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e4bd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:28:43, skipping insertion in model container [2018-07-24 12:28:43,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:28:34" (2/3) ... [2018-07-24 12:28:43,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e4bd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:28:43, skipping insertion in model container [2018-07-24 12:28:43,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:28:43" (3/3) ... [2018-07-24 12:28:43,971 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label01_false-unreach-call.c [2018-07-24 12:28:43,980 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:28:43,990 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:28:44,054 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:28:44,054 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:28:44,055 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:28:44,055 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:28:44,055 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:28:44,055 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:28:44,055 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:28:44,056 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:28:44,056 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:28:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-07-24 12:28:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-24 12:28:44,113 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:28:44,114 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] [2018-07-24 12:28:44,115 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:28:44,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1850292967, now seen corresponding path program 1 times [2018-07-24 12:28:44,122 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:28:44,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:28:44,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:28:44,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:28:44,167 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:28:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:28:44,581 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:28:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:28:44,666 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:28:44,667 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:28:44,667 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:28:44,674 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:28:44,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:28:44,690 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:28:44,694 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-07-24 12:28:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:28:50,713 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-07-24 12:28:50,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:28:50,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2018-07-24 12:28:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:28:50,748 INFO L225 Difference]: With dead ends: 2251 [2018-07-24 12:28:50,749 INFO L226 Difference]: Without dead ends: 1474 [2018-07-24 12:28:50,761 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:28:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-07-24 12:28:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-07-24 12:28:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-07-24 12:28:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2715 transitions. [2018-07-24 12:28:50,916 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2715 transitions. Word has length 33 [2018-07-24 12:28:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:28:50,917 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2715 transitions. [2018-07-24 12:28:50,917 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:28:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2715 transitions. [2018-07-24 12:28:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-24 12:28:50,923 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:28:50,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:28:50,924 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:28:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1123651301, now seen corresponding path program 1 times [2018-07-24 12:28:50,924 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:28:50,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:28:50,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:28:50,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:28:50,926 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:28:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:28:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:28:51,190 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:28:51,190 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 12:28:51,190 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:28:51,192 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:28:51,192 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:28:51,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:28:51,193 INFO L87 Difference]: Start difference. First operand 1474 states and 2715 transitions. Second operand 5 states. [2018-07-24 12:28:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:28:59,671 INFO L93 Difference]: Finished difference Result 4419 states and 8226 transitions. [2018-07-24 12:28:59,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:28:59,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2018-07-24 12:28:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:28:59,691 INFO L225 Difference]: With dead ends: 4419 [2018-07-24 12:28:59,691 INFO L226 Difference]: Without dead ends: 2951 [2018-07-24 12:28:59,697 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:28:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2018-07-24 12:28:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2925. [2018-07-24 12:28:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-07-24 12:28:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4901 transitions. [2018-07-24 12:28:59,785 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4901 transitions. Word has length 104 [2018-07-24 12:28:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:28:59,786 INFO L471 AbstractCegarLoop]: Abstraction has 2925 states and 4901 transitions. [2018-07-24 12:28:59,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:28:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4901 transitions. [2018-07-24 12:28:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-24 12:28:59,790 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:28:59,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:28:59,791 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:28:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 129078340, now seen corresponding path program 1 times [2018-07-24 12:28:59,791 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:28:59,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:28:59,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:28:59,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:28:59,793 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:28:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:28:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:28:59,973 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:28:59,973 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 12:28:59,973 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:28:59,974 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:28:59,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:28:59,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:28:59,975 INFO L87 Difference]: Start difference. First operand 2925 states and 4901 transitions. Second operand 5 states. [2018-07-24 12:29:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:29:11,573 INFO L93 Difference]: Finished difference Result 10301 states and 17313 transitions. [2018-07-24 12:29:11,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:29:11,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2018-07-24 12:29:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:29:11,624 INFO L225 Difference]: With dead ends: 10301 [2018-07-24 12:29:11,624 INFO L226 Difference]: Without dead ends: 7382 [2018-07-24 12:29:11,640 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:29:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7382 states. [2018-07-24 12:29:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7382 to 7290. [2018-07-24 12:29:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7290 states. [2018-07-24 12:29:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7290 states to 7290 states and 10504 transitions. [2018-07-24 12:29:11,869 INFO L78 Accepts]: Start accepts. Automaton has 7290 states and 10504 transitions. Word has length 109 [2018-07-24 12:29:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:29:11,870 INFO L471 AbstractCegarLoop]: Abstraction has 7290 states and 10504 transitions. [2018-07-24 12:29:11,870 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:29:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7290 states and 10504 transitions. [2018-07-24 12:29:11,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-24 12:29:11,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:29:11,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:29:11,874 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:29:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1258667696, now seen corresponding path program 1 times [2018-07-24 12:29:11,874 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:29:11,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:11,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:11,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:11,875 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:29:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:29:12,090 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:29:12,090 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:29:12,090 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:29:12,091 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:29:12,091 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:29:12,091 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:29:12,092 INFO L87 Difference]: Start difference. First operand 7290 states and 10504 transitions. Second operand 4 states. [2018-07-24 12:29:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:29:21,022 INFO L93 Difference]: Finished difference Result 27307 states and 41012 transitions. [2018-07-24 12:29:21,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:29:21,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2018-07-24 12:29:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:29:21,114 INFO L225 Difference]: With dead ends: 27307 [2018-07-24 12:29:21,114 INFO L226 Difference]: Without dead ends: 20023 [2018-07-24 12:29:21,161 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:29:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20023 states. [2018-07-24 12:29:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20023 to 20018. [2018-07-24 12:29:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20018 states. [2018-07-24 12:29:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20018 states to 20018 states and 28162 transitions. [2018-07-24 12:29:21,630 INFO L78 Accepts]: Start accepts. Automaton has 20018 states and 28162 transitions. Word has length 131 [2018-07-24 12:29:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:29:21,631 INFO L471 AbstractCegarLoop]: Abstraction has 20018 states and 28162 transitions. [2018-07-24 12:29:21,632 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:29:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 20018 states and 28162 transitions. [2018-07-24 12:29:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-24 12:29:21,636 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:29:21,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:29:21,637 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:29:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1238723597, now seen corresponding path program 1 times [2018-07-24 12:29:21,637 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:29:21,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:21,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:21,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:21,640 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:29:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:22,000 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:29:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:29:22,240 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:29:22,240 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:29:22,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:22,250 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:29:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:22,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:29:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:29:22,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:29:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:29:23,100 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:29:23,101 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 12:29:23,101 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:29:23,101 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:29:23,102 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:29:23,102 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:29:23,102 INFO L87 Difference]: Start difference. First operand 20018 states and 28162 transitions. Second operand 3 states. [2018-07-24 12:29:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:29:28,546 INFO L93 Difference]: Finished difference Result 47864 states and 67837 transitions. [2018-07-24 12:29:28,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:29:28,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2018-07-24 12:29:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:29:28,675 INFO L225 Difference]: With dead ends: 47864 [2018-07-24 12:29:28,675 INFO L226 Difference]: Without dead ends: 27852 [2018-07-24 12:29:28,761 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 311 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:29:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27852 states. [2018-07-24 12:29:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27852 to 27849. [2018-07-24 12:29:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27849 states. [2018-07-24 12:29:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27849 states to 27849 states and 37207 transitions. [2018-07-24 12:29:29,329 INFO L78 Accepts]: Start accepts. Automaton has 27849 states and 37207 transitions. Word has length 156 [2018-07-24 12:29:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:29:29,329 INFO L471 AbstractCegarLoop]: Abstraction has 27849 states and 37207 transitions. [2018-07-24 12:29:29,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:29:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27849 states and 37207 transitions. [2018-07-24 12:29:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-07-24 12:29:29,341 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:29:29,342 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:29:29,342 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:29:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash -775502384, now seen corresponding path program 1 times [2018-07-24 12:29:29,346 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:29:29,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:29,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:29,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:29,347 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:29:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:29,622 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:29:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:29:29,887 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:29:29,887 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:29:29,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:29,903 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:29:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:30,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:29:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-24 12:29:30,672 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:29:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:29:31,697 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:29:31,697 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2018-07-24 12:29:31,697 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:29:31,698 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:29:31,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:29:31,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:29:31,699 INFO L87 Difference]: Start difference. First operand 27849 states and 37207 transitions. Second operand 5 states. [2018-07-24 12:29:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:29:38,592 INFO L93 Difference]: Finished difference Result 55879 states and 75201 transitions. [2018-07-24 12:29:38,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:29:38,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2018-07-24 12:29:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:29:38,664 INFO L225 Difference]: With dead ends: 55879 [2018-07-24 12:29:38,664 INFO L226 Difference]: Without dead ends: 28036 [2018-07-24 12:29:38,709 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 499 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:29:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28036 states. [2018-07-24 12:29:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28036 to 27280. [2018-07-24 12:29:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27280 states. [2018-07-24 12:29:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27280 states to 27280 states and 34231 transitions. [2018-07-24 12:29:39,200 INFO L78 Accepts]: Start accepts. Automaton has 27280 states and 34231 transitions. Word has length 252 [2018-07-24 12:29:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:29:39,208 INFO L471 AbstractCegarLoop]: Abstraction has 27280 states and 34231 transitions. [2018-07-24 12:29:39,208 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:29:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 27280 states and 34231 transitions. [2018-07-24 12:29:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-07-24 12:29:39,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:29:39,233 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:29:39,233 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:29:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash 764972962, now seen corresponding path program 1 times [2018-07-24 12:29:39,234 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:29:39,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:39,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:39,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:39,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:29:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 155 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:29:40,108 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:29:40,108 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:29:40,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:40,120 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:29:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:40,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:29:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-24 12:29:40,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:29:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 155 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:29:40,863 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:29:40,863 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:29:40,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:40,894 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:29:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:41,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:29:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-24 12:29:41,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:29:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 155 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:29:41,574 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:29:41,574 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:29:41,574 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:29:41,575 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:29:41,575 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:29:41,575 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:29:41,576 INFO L87 Difference]: Start difference. First operand 27280 states and 34231 transitions. Second operand 9 states. [2018-07-24 12:29:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:29:57,140 INFO L93 Difference]: Finished difference Result 70897 states and 93078 transitions. [2018-07-24 12:29:57,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:29:57,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 379 [2018-07-24 12:29:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:29:57,307 INFO L225 Difference]: With dead ends: 70897 [2018-07-24 12:29:57,307 INFO L226 Difference]: Without dead ends: 38934 [2018-07-24 12:29:57,423 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1517 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:29:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38934 states. [2018-07-24 12:29:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38934 to 35502. [2018-07-24 12:29:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35502 states. [2018-07-24 12:29:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35502 states to 35502 states and 40334 transitions. [2018-07-24 12:29:58,541 INFO L78 Accepts]: Start accepts. Automaton has 35502 states and 40334 transitions. Word has length 379 [2018-07-24 12:29:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:29:58,542 INFO L471 AbstractCegarLoop]: Abstraction has 35502 states and 40334 transitions. [2018-07-24 12:29:58,542 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:29:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 35502 states and 40334 transitions. [2018-07-24 12:29:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-07-24 12:29:58,574 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:29:58,574 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:29:58,574 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:29:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash -17973887, now seen corresponding path program 1 times [2018-07-24 12:29:58,575 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:29:58,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:58,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:29:58,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:29:58,579 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:29:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:29:59,255 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:29:59,903 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:30:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 9 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:30:00,400 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:30:00,400 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:30:00,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:00,408 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:30:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:00,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:30:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2018-07-24 12:30:00,879 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:30:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 78 proven. 220 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-07-24 12:30:01,728 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:30:01,729 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 5] total 24 [2018-07-24 12:30:01,729 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:30:01,729 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:30:01,729 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:30:01,730 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:30:01,730 INFO L87 Difference]: Start difference. First operand 35502 states and 40334 transitions. Second operand 5 states. [2018-07-24 12:30:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:30:07,316 INFO L93 Difference]: Finished difference Result 80083 states and 90447 transitions. [2018-07-24 12:30:07,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:30:07,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 412 [2018-07-24 12:30:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:30:07,432 INFO L225 Difference]: With dead ends: 80083 [2018-07-24 12:30:07,432 INFO L226 Difference]: Without dead ends: 42620 [2018-07-24 12:30:07,510 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 822 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:30:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42620 states. [2018-07-24 12:30:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42620 to 41842. [2018-07-24 12:30:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41842 states. [2018-07-24 12:30:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41842 states to 41842 states and 47173 transitions. [2018-07-24 12:30:08,210 INFO L78 Accepts]: Start accepts. Automaton has 41842 states and 47173 transitions. Word has length 412 [2018-07-24 12:30:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:30:08,210 INFO L471 AbstractCegarLoop]: Abstraction has 41842 states and 47173 transitions. [2018-07-24 12:30:08,210 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:30:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41842 states and 47173 transitions. [2018-07-24 12:30:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-07-24 12:30:08,248 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:30:08,248 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:30:08,249 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:30:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 655743401, now seen corresponding path program 1 times [2018-07-24 12:30:08,249 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:30:08,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:08,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:08,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:08,250 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:30:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:08,975 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:30:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 84 proven. 318 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:30:09,916 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:30:09,916 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:30:09,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:09,924 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:30:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:10,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:30:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-24 12:30:10,629 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:30:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 171 proven. 89 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-07-24 12:30:10,936 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:30:10,936 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:30:10,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:10,953 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:30:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:11,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:30:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-07-24 12:30:11,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:30:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 86 proven. 229 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 12:30:12,409 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:30:12,410 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-07-24 12:30:12,410 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:30:12,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:30:12,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:30:12,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:30:12,412 INFO L87 Difference]: Start difference. First operand 41842 states and 47173 transitions. Second operand 13 states. [2018-07-24 12:30:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:30:23,068 INFO L93 Difference]: Finished difference Result 93226 states and 111037 transitions. [2018-07-24 12:30:23,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-24 12:30:23,069 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 580 [2018-07-24 12:30:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:30:23,214 INFO L225 Difference]: With dead ends: 93226 [2018-07-24 12:30:23,214 INFO L226 Difference]: Without dead ends: 51521 [2018-07-24 12:30:23,293 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2359 GetRequests, 2323 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-07-24 12:30:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51521 states. [2018-07-24 12:30:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51521 to 48923. [2018-07-24 12:30:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48923 states. [2018-07-24 12:30:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48923 states to 48923 states and 56109 transitions. [2018-07-24 12:30:24,666 INFO L78 Accepts]: Start accepts. Automaton has 48923 states and 56109 transitions. Word has length 580 [2018-07-24 12:30:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:30:24,667 INFO L471 AbstractCegarLoop]: Abstraction has 48923 states and 56109 transitions. [2018-07-24 12:30:24,667 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:30:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 48923 states and 56109 transitions. [2018-07-24 12:30:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2018-07-24 12:30:24,732 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:30:24,733 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:30:24,733 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:30:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1901667041, now seen corresponding path program 1 times [2018-07-24 12:30:24,734 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:30:24,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:24,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:24,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:24,735 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:30:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:25,448 WARN L169 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-07-24 12:30:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 293 proven. 314 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 12:30:25,871 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:30:25,871 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:30:25,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:25,885 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:30:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:26,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:30:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 438 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-07-24 12:30:26,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:30:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 438 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-07-24 12:30:26,674 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:30:26,674 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:30:26,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:26,961 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:30:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:27,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:30:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 438 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-07-24 12:30:27,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:30:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 438 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-07-24 12:30:28,074 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:30:28,074 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 22 [2018-07-24 12:30:28,074 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:30:28,076 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:30:28,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:30:28,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:30:28,077 INFO L87 Difference]: Start difference. First operand 48923 states and 56109 transitions. Second operand 15 states. [2018-07-24 12:30:51,509 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 12:30:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:30:55,267 INFO L93 Difference]: Finished difference Result 112111 states and 129651 transitions. [2018-07-24 12:30:55,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-24 12:30:55,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 671 [2018-07-24 12:30:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:30:55,384 INFO L225 Difference]: With dead ends: 112111 [2018-07-24 12:30:55,385 INFO L226 Difference]: Without dead ends: 51803 [2018-07-24 12:30:55,479 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2936 GetRequests, 2777 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9637 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2616, Invalid=22506, Unknown=0, NotChecked=0, Total=25122 [2018-07-24 12:30:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51803 states. [2018-07-24 12:30:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51803 to 49016. [2018-07-24 12:30:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49016 states. [2018-07-24 12:30:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49016 states to 49016 states and 54233 transitions. [2018-07-24 12:30:56,156 INFO L78 Accepts]: Start accepts. Automaton has 49016 states and 54233 transitions. Word has length 671 [2018-07-24 12:30:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:30:56,157 INFO L471 AbstractCegarLoop]: Abstraction has 49016 states and 54233 transitions. [2018-07-24 12:30:56,157 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 12:30:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 49016 states and 54233 transitions. [2018-07-24 12:30:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2018-07-24 12:30:56,243 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:30:56,244 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:30:56,244 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:30:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash 598788048, now seen corresponding path program 1 times [2018-07-24 12:30:56,245 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:30:56,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:56,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:56,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:30:56,246 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:30:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:57,088 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:30:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 522 proven. 641 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 12:30:58,167 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:30:58,167 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:30:58,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:30:58,179 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:30:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:30:58,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:30:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 514 proven. 0 refuted. 0 times theorem prover too weak. 934 trivial. 0 not checked. [2018-07-24 12:30:59,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 156 proven. 468 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2018-07-24 12:31:00,057 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:31:00,058 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 6] total 24 [2018-07-24 12:31:00,058 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:31:00,059 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:31:00,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:31:00,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:31:00,059 INFO L87 Difference]: Start difference. First operand 49016 states and 54233 transitions. Second operand 5 states. [2018-07-24 12:31:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:31:06,596 INFO L93 Difference]: Finished difference Result 113263 states and 126868 transitions. [2018-07-24 12:31:06,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:31:06,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2018-07-24 12:31:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:31:06,727 INFO L225 Difference]: With dead ends: 113263 [2018-07-24 12:31:06,727 INFO L226 Difference]: Without dead ends: 64258 [2018-07-24 12:31:06,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1690 GetRequests, 1661 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:31:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64258 states. [2018-07-24 12:31:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64258 to 63225. [2018-07-24 12:31:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63225 states. [2018-07-24 12:31:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63225 states to 63225 states and 70399 transitions. [2018-07-24 12:31:07,620 INFO L78 Accepts]: Start accepts. Automaton has 63225 states and 70399 transitions. Word has length 834 [2018-07-24 12:31:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:31:07,621 INFO L471 AbstractCegarLoop]: Abstraction has 63225 states and 70399 transitions. [2018-07-24 12:31:07,621 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:31:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 63225 states and 70399 transitions. [2018-07-24 12:31:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1363 [2018-07-24 12:31:07,691 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:07,692 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:31:07,692 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:31:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -118537361, now seen corresponding path program 1 times [2018-07-24 12:31:07,693 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:07,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:07,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:07,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:07,694 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 865 proven. 1036 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2018-07-24 12:31:10,633 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:31:10,633 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:31:10,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:10,642 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:31:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:11,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:31:11,470 WARN L169 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-07-24 12:31:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 1258 proven. 2 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2018-07-24 12:31:12,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:12,769 WARN L169 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-07-24 12:31:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 668 proven. 106 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2018-07-24 12:31:14,617 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:31:14,617 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 12:31:14,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:14,633 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:31:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:15,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:31:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 1270 proven. 18 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2018-07-24 12:31:16,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:31:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 668 proven. 106 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2018-07-24 12:31:19,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:31:19,377 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5, 6, 5] total 28 [2018-07-24 12:31:19,377 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:31:19,380 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-24 12:31:19,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-24 12:31:19,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2018-07-24 12:31:19,381 INFO L87 Difference]: Start difference. First operand 63225 states and 70399 transitions. Second operand 22 states. [2018-07-24 12:31:38,631 WARN L169 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2018-07-24 12:31:39,664 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-07-24 12:31:40,868 WARN L169 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-07-24 12:31:43,236 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-07-24 12:31:44,406 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2018-07-24 12:31:46,749 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-07-24 12:31:47,069 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2018-07-24 12:31:48,843 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-07-24 12:31:49,937 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2018-07-24 12:31:52,187 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2018-07-24 12:31:53,937 WARN L169 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2018-07-24 12:32:01,112 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2018-07-24 12:32:03,296 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-07-24 12:32:08,848 WARN L169 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2018-07-24 12:32:09,907 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 Received shutdown request... [2018-07-24 12:32:24,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2018-07-24 12:32:24,962 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:32:24,968 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:32:24,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:32:24 BoogieIcfgContainer [2018-07-24 12:32:24,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:32:24,969 INFO L168 Benchmark]: Toolchain (without parser) took 232328.90 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 390.9 MB. Max. memory is 7.1 GB. [2018-07-24 12:32:24,971 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:32:24,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1999.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:32:24,972 INFO L168 Benchmark]: Boogie Procedure Inliner took 181.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:32:24,973 INFO L168 Benchmark]: Boogie Preprocessor took 682.08 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 814.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:32:24,974 INFO L168 Benchmark]: RCFGBuilder took 8450.76 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 549.5 MB). Peak memory consumption was 549.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:32:24,975 INFO L168 Benchmark]: TraceAbstraction took 221004.39 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 3.3 GB in the end (delta: -1.6 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:32:24,982 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1999.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 181.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 682.08 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 814.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8450.76 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 549.5 MB). Peak memory consumption was 549.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221004.39 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 3.3 GB in the end (delta: -1.6 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 87). Cancelled while BasicCegarLoop was constructing difference of abstraction (63225states) and interpolant automaton (currently 190 states, 22 states before enhancement), while ReachableStatesComputation was computing reachable states (135333 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 220.9s OverallTime, 12 OverallIterations, 8 TraceHistogramMax, 180.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2959 SDtfs, 62794 SDslu, 5247 SDs, 0 SdLazy, 117110 SolverSat, 19119 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 128.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16021 GetRequests, 15492 SyntacticMatches, 33 SemanticMatches, 496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28321 ImplicationChecksByTransitivity, 29.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63225occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.6s AutomataMinimizationTime, 11 MinimizatonAttempts, 11510 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 24.6s InterpolantComputationTime, 12661 NumberOfCodeBlocks, 12661 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 20263 ConstructedInterpolants, 0 QuantifiedInterpolants, 54004455 SizeOfPredicates, 13 NumberOfNonLiveVariables, 11012 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 36 InterpolantComputations, 9 PerfectInterpolantSequences, 20467/24791 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label01_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-32-25-010.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label01_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-32-25-010.csv Completed graceful shutdown