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/Problem15_label04_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:30:52,124 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:30:52,126 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:30:52,142 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:30:52,143 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:30:52,144 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:30:52,145 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:30:52,147 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:30:52,148 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:30:52,149 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:30:52,150 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:30:52,150 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:30:52,151 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:30:52,152 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:30:52,153 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:30:52,154 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:30:52,155 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:30:52,159 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:30:52,161 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:30:52,168 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:30:52,170 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:30:52,172 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:30:52,174 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:30:52,177 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:30:52,177 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:30:52,178 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:30:52,179 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:30:52,180 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:30:52,182 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:30:52,184 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:30:52,184 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:30:52,184 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:30:52,185 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:30:52,185 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:30:52,186 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:30:52,186 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:30:52,187 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 14:30:52,201 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:30:52,201 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:30:52,202 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:30:52,203 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:30:52,203 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:30:52,203 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:30:52,203 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:30:52,203 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:30:52,204 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:30:52,204 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:30:52,204 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:30:52,205 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:30:52,205 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:30:52,205 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:30:52,205 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:30:52,205 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:30:52,205 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:30:52,206 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:30:52,206 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:30:52,206 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:30:52,206 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:30:52,206 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:30:52,207 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:30:52,207 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:30:52,207 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:30:52,209 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:30:52,209 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:30:52,210 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:30:52,210 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:30:52,210 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:30:52,210 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:30:52,210 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:30:52,211 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:30:52,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:30:52,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:30:52,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:30:52,276 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:30:52,276 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:30:52,277 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label04_true-unreach-call.c [2018-07-24 14:30:52,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fed1ac59/4055cfab80b44b19a975a3113ef0b136/FLAG9921b35d2 [2018-07-24 14:30:53,042 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:30:53,043 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label04_true-unreach-call.c [2018-07-24 14:30:53,064 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fed1ac59/4055cfab80b44b19a975a3113ef0b136/FLAG9921b35d2 [2018-07-24 14:30:53,079 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fed1ac59/4055cfab80b44b19a975a3113ef0b136 [2018-07-24 14:30:53,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:30:53,092 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:30:53,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:30:53,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:30:53,100 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:30:53,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:30:53" (1/1) ... [2018-07-24 14:30:53,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37282a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:53, skipping insertion in model container [2018-07-24 14:30:53,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:30:53" (1/1) ... [2018-07-24 14:30:53,333 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:30:53,907 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:30:53,926 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:30:54,261 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:30:54,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54 WrapperNode [2018-07-24 14:30:54,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:30:54,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:30:54,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:30:54,414 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:30:54,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:54,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:54,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:30:54,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:30:54,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:30:54,690 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:30:54,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:54,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:54,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:54,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:55,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:55,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:55,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... [2018-07-24 14:30:55,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:30:55,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:30:55,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:30:55,333 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:30:55,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:30:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:30:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:30:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:30:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:30:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:30:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:30:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:30:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:30:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:30:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:31:01,817 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:31:01,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:31:01 BoogieIcfgContainer [2018-07-24 14:31:01,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:31:01,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:31:01,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:31:01,822 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:31:01,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:30:53" (1/3) ... [2018-07-24 14:31:01,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17228709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:31:01, skipping insertion in model container [2018-07-24 14:31:01,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:54" (2/3) ... [2018-07-24 14:31:01,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17228709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:31:01, skipping insertion in model container [2018-07-24 14:31:01,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:31:01" (3/3) ... [2018-07-24 14:31:01,826 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label04_true-unreach-call.c [2018-07-24 14:31:01,835 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:31:01,844 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:31:01,897 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:31:01,898 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:31:01,898 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:31:01,898 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:31:01,898 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:31:01,898 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:31:01,899 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:31:01,899 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:31:01,899 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:31:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 14:31:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-24 14:31:01,943 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:01,944 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:01,944 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1426403932, now seen corresponding path program 1 times [2018-07-24 14:31:01,954 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:02,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:02,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:02,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:02,006 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:31:02,469 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:31:02,469 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:31:02,469 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:31:02,475 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:31:02,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:31:02,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:31:02,495 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-07-24 14:31:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:10,698 INFO L93 Difference]: Finished difference Result 1514 states and 2777 transitions. [2018-07-24 14:31:10,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:31:10,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-07-24 14:31:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:10,725 INFO L225 Difference]: With dead ends: 1514 [2018-07-24 14:31:10,725 INFO L226 Difference]: Without dead ends: 1070 [2018-07-24 14:31:10,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 14:31:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-07-24 14:31:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1068. [2018-07-24 14:31:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-07-24 14:31:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1675 transitions. [2018-07-24 14:31:10,869 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1675 transitions. Word has length 38 [2018-07-24 14:31:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:10,870 INFO L471 AbstractCegarLoop]: Abstraction has 1068 states and 1675 transitions. [2018-07-24 14:31:10,870 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:31:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1675 transitions. [2018-07-24 14:31:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-24 14:31:10,882 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:10,885 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:10,886 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:10,886 INFO L82 PathProgramCache]: Analyzing trace with hash -753502801, now seen corresponding path program 1 times [2018-07-24 14:31:10,886 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:10,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:10,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:10,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:10,890 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:31:11,167 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:31:11,167 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:31:11,167 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:31:11,169 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:31:11,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:31:11,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:31:11,171 INFO L87 Difference]: Start difference. First operand 1068 states and 1675 transitions. Second operand 4 states. [2018-07-24 14:31:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:17,697 INFO L93 Difference]: Finished difference Result 3988 states and 6459 transitions. [2018-07-24 14:31:17,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:31:17,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2018-07-24 14:31:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:17,722 INFO L225 Difference]: With dead ends: 3988 [2018-07-24 14:31:17,723 INFO L226 Difference]: Without dead ends: 2926 [2018-07-24 14:31:17,732 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 14:31:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2018-07-24 14:31:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2613. [2018-07-24 14:31:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2613 states. [2018-07-24 14:31:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3832 transitions. [2018-07-24 14:31:17,848 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3832 transitions. Word has length 108 [2018-07-24 14:31:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:17,849 INFO L471 AbstractCegarLoop]: Abstraction has 2613 states and 3832 transitions. [2018-07-24 14:31:17,849 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:31:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3832 transitions. [2018-07-24 14:31:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-07-24 14:31:17,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:17,873 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 14:31:17,874 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1348737385, now seen corresponding path program 1 times [2018-07-24 14:31:17,874 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:17,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:17,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:17,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:17,876 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 101 proven. 237 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 14:31:18,446 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:18,446 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:18,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:18,456 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:18,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:31:19,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:19,391 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:31:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 101 proven. 166 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 14:31:20,520 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:31:20,520 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:31:20,520 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:31:20,521 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:31:20,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:31:20,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:31:20,529 INFO L87 Difference]: Start difference. First operand 2613 states and 3832 transitions. Second operand 5 states. [2018-07-24 14:31:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:29,271 INFO L93 Difference]: Finished difference Result 7822 states and 11690 transitions. [2018-07-24 14:31:29,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:31:29,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 314 [2018-07-24 14:31:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:29,317 INFO L225 Difference]: With dead ends: 7822 [2018-07-24 14:31:29,317 INFO L226 Difference]: Without dead ends: 5215 [2018-07-24 14:31:29,332 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 625 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:31:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2018-07-24 14:31:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 5177. [2018-07-24 14:31:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5177 states. [2018-07-24 14:31:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5177 states to 5177 states and 7065 transitions. [2018-07-24 14:31:29,514 INFO L78 Accepts]: Start accepts. Automaton has 5177 states and 7065 transitions. Word has length 314 [2018-07-24 14:31:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:29,517 INFO L471 AbstractCegarLoop]: Abstraction has 5177 states and 7065 transitions. [2018-07-24 14:31:29,517 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:31:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5177 states and 7065 transitions. [2018-07-24 14:31:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-07-24 14:31:29,527 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:29,527 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:31:29,528 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1085463539, now seen corresponding path program 1 times [2018-07-24 14:31:29,528 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:29,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:29,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:29,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:29,530 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:31:30,012 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:30,012 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:30,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:30,021 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:30,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:31:30,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:31:30,862 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:30,862 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:30,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:30,890 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:31,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:31:31,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:31:31,586 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:31,587 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:31:31,587 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:31,588 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:31:31,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:31:31,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:31:31,590 INFO L87 Difference]: Start difference. First operand 5177 states and 7065 transitions. Second operand 9 states. [2018-07-24 14:31:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:41,991 INFO L93 Difference]: Finished difference Result 15917 states and 23820 transitions. [2018-07-24 14:31:41,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-24 14:31:41,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 339 [2018-07-24 14:31:41,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:42,071 INFO L225 Difference]: With dead ends: 15917 [2018-07-24 14:31:42,071 INFO L226 Difference]: Without dead ends: 10746 [2018-07-24 14:31:42,131 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1378 GetRequests, 1354 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:31:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10746 states. [2018-07-24 14:31:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10746 to 10697. [2018-07-24 14:31:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10697 states. [2018-07-24 14:31:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 14216 transitions. [2018-07-24 14:31:42,444 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 14216 transitions. Word has length 339 [2018-07-24 14:31:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:42,445 INFO L471 AbstractCegarLoop]: Abstraction has 10697 states and 14216 transitions. [2018-07-24 14:31:42,445 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:31:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 14216 transitions. [2018-07-24 14:31:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2018-07-24 14:31:42,464 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:42,464 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:42,465 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -21882345, now seen corresponding path program 1 times [2018-07-24 14:31:42,465 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:42,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:42,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:42,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:42,466 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-24 14:31:43,049 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:31:43,049 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:31:43,049 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:31:43,050 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:31:43,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:31:43,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:31:43,051 INFO L87 Difference]: Start difference. First operand 10697 states and 14216 transitions. Second operand 3 states. [2018-07-24 14:31:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:47,262 INFO L93 Difference]: Finished difference Result 24220 states and 33899 transitions. [2018-07-24 14:31:47,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:31:47,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2018-07-24 14:31:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:47,350 INFO L225 Difference]: With dead ends: 24220 [2018-07-24 14:31:47,350 INFO L226 Difference]: Without dead ends: 13529 [2018-07-24 14:31:47,417 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:31:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13529 states. [2018-07-24 14:31:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13529 to 13524. [2018-07-24 14:31:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13524 states. [2018-07-24 14:31:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13524 states to 13524 states and 18271 transitions. [2018-07-24 14:31:47,788 INFO L78 Accepts]: Start accepts. Automaton has 13524 states and 18271 transitions. Word has length 480 [2018-07-24 14:31:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:47,789 INFO L471 AbstractCegarLoop]: Abstraction has 13524 states and 18271 transitions. [2018-07-24 14:31:47,790 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:31:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 13524 states and 18271 transitions. [2018-07-24 14:31:47,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-07-24 14:31:47,824 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:47,825 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:31:47,825 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 798760387, now seen corresponding path program 1 times [2018-07-24 14:31:47,825 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:47,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:47,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:47,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:47,827 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 410 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:31:48,556 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:48,556 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:48,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:48,577 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:48,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 410 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:31:49,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 410 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:31:49,439 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:49,439 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:49,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:49,455 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:49,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 410 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:31:50,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 410 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:31:51,015 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:51,016 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-07-24 14:31:51,016 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:51,017 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:31:51,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:31:51,017 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:31:51,018 INFO L87 Difference]: Start difference. First operand 13524 states and 18271 transitions. Second operand 6 states. [2018-07-24 14:32:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:04,131 INFO L93 Difference]: Finished difference Result 36265 states and 50554 transitions. [2018-07-24 14:32:04,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:32:04,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 547 [2018-07-24 14:32:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:04,233 INFO L225 Difference]: With dead ends: 36265 [2018-07-24 14:32:04,233 INFO L226 Difference]: Without dead ends: 22747 [2018-07-24 14:32:04,300 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2201 GetRequests, 2185 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:32:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2018-07-24 14:32:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 22705. [2018-07-24 14:32:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22705 states. [2018-07-24 14:32:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 29368 transitions. [2018-07-24 14:32:04,861 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 29368 transitions. Word has length 547 [2018-07-24 14:32:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:04,862 INFO L471 AbstractCegarLoop]: Abstraction has 22705 states and 29368 transitions. [2018-07-24 14:32:04,862 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:32:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 29368 transitions. [2018-07-24 14:32:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2018-07-24 14:32:04,912 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:04,913 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:32:04,913 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash -431534846, now seen corresponding path program 1 times [2018-07-24 14:32:04,913 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:04,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:04,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:04,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:04,915 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-07-24 14:32:05,633 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:05,633 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:05,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:05,651 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:05,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-07-24 14:32:05,992 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-07-24 14:32:06,538 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:32:06,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-07-24 14:32:06,539 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:32:06,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:32:06,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:32:06,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:32:06,541 INFO L87 Difference]: Start difference. First operand 22705 states and 29368 transitions. Second operand 3 states. [2018-07-24 14:32:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:09,919 INFO L93 Difference]: Finished difference Result 45713 states and 59185 transitions. [2018-07-24 14:32:09,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:32:09,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 581 [2018-07-24 14:32:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:10,017 INFO L225 Difference]: With dead ends: 45713 [2018-07-24 14:32:10,018 INFO L226 Difference]: Without dead ends: 23014 [2018-07-24 14:32:10,296 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1164 GetRequests, 1162 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 14:32:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23014 states. [2018-07-24 14:32:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23014 to 22701. [2018-07-24 14:32:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22701 states. [2018-07-24 14:32:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22701 states to 22701 states and 29339 transitions. [2018-07-24 14:32:10,771 INFO L78 Accepts]: Start accepts. Automaton has 22701 states and 29339 transitions. Word has length 581 [2018-07-24 14:32:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:10,772 INFO L471 AbstractCegarLoop]: Abstraction has 22701 states and 29339 transitions. [2018-07-24 14:32:10,772 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:32:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 22701 states and 29339 transitions. [2018-07-24 14:32:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2018-07-24 14:32:10,825 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:10,826 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:10,826 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:10,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1442321276, now seen corresponding path program 1 times [2018-07-24 14:32:10,826 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:10,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:10,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:10,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:10,828 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 14:32:11,721 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:11,721 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:11,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:11,735 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:11,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 14:32:12,218 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 14:32:12,665 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:12,665 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 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:12,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:12,680 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:13,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 14:32:13,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-07-24 14:32:13,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:13,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:32:13,743 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:13,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:32:13,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:32:13,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:32:13,744 INFO L87 Difference]: Start difference. First operand 22701 states and 29339 transitions. Second operand 9 states. [2018-07-24 14:32:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:22,955 INFO L93 Difference]: Finished difference Result 48897 states and 65436 transitions. [2018-07-24 14:32:22,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:32:22,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 590 [2018-07-24 14:32:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:23,056 INFO L225 Difference]: With dead ends: 48897 [2018-07-24 14:32:23,056 INFO L226 Difference]: Without dead ends: 26202 [2018-07-24 14:32:23,141 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2378 GetRequests, 2358 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:32:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26202 states. [2018-07-24 14:32:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26202 to 26153. [2018-07-24 14:32:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26153 states. [2018-07-24 14:32:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26153 states to 26153 states and 33399 transitions. [2018-07-24 14:32:23,716 INFO L78 Accepts]: Start accepts. Automaton has 26153 states and 33399 transitions. Word has length 590 [2018-07-24 14:32:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:23,717 INFO L471 AbstractCegarLoop]: Abstraction has 26153 states and 33399 transitions. [2018-07-24 14:32:23,718 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:32:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26153 states and 33399 transitions. [2018-07-24 14:32:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2018-07-24 14:32:23,785 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:23,790 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:23,790 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -497347180, now seen corresponding path program 1 times [2018-07-24 14:32:23,790 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:23,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:23,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:23,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:23,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 487 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:32:24,746 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:24,746 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:24,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:24,759 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:24,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 487 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:32:25,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 487 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:32:25,723 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:25,723 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:25,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:25,739 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:26,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 487 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:32:26,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 487 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:32:26,610 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:26,610 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:32:26,610 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:26,611 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:32:26,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:32:26,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:32:26,612 INFO L87 Difference]: Start difference. First operand 26153 states and 33399 transitions. Second operand 9 states. [2018-07-24 14:32:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:35,891 INFO L93 Difference]: Finished difference Result 52137 states and 65716 transitions. [2018-07-24 14:32:35,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 14:32:35,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 600 [2018-07-24 14:32:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:35,969 INFO L225 Difference]: With dead ends: 52137 [2018-07-24 14:32:35,969 INFO L226 Difference]: Without dead ends: 25990 [2018-07-24 14:32:36,035 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2420 GetRequests, 2399 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:32:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25990 states. [2018-07-24 14:32:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25990 to 25325. [2018-07-24 14:32:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25325 states. [2018-07-24 14:32:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25325 states to 25325 states and 28533 transitions. [2018-07-24 14:32:36,431 INFO L78 Accepts]: Start accepts. Automaton has 25325 states and 28533 transitions. Word has length 600 [2018-07-24 14:32:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:36,432 INFO L471 AbstractCegarLoop]: Abstraction has 25325 states and 28533 transitions. [2018-07-24 14:32:36,432 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:32:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 25325 states and 28533 transitions. [2018-07-24 14:32:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2018-07-24 14:32:36,456 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:36,456 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:36,457 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash 505028066, now seen corresponding path program 1 times [2018-07-24 14:32:36,457 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:36,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:36,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:36,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:36,459 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:37,072 WARN L169 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-07-24 14:32:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 393 proven. 100 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-07-24 14:32:37,389 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:37,389 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:37,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:37,405 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:37,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 654 proven. 2 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-07-24 14:32:38,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 393 proven. 100 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-07-24 14:32:38,964 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:38,964 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:38,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:38,983 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:39,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 654 proven. 2 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-07-24 14:32:39,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:40,050 WARN L169 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-07-24 14:32:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 393 proven. 100 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-07-24 14:32:40,424 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:40,425 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 11 [2018-07-24 14:32:40,425 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:40,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 14:32:40,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 14:32:40,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:32:40,427 INFO L87 Difference]: Start difference. First operand 25325 states and 28533 transitions. Second operand 8 states. [2018-07-24 14:32:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:58,196 INFO L93 Difference]: Finished difference Result 77053 states and 91854 transitions. [2018-07-24 14:32:58,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:32:58,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 602 [2018-07-24 14:32:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:58,356 INFO L225 Difference]: With dead ends: 77053 [2018-07-24 14:32:58,356 INFO L226 Difference]: Without dead ends: 51794 [2018-07-24 14:32:58,462 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2420 GetRequests, 2403 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:32:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51794 states. [2018-07-24 14:32:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51794 to 48183. [2018-07-24 14:32:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48183 states. [2018-07-24 14:32:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48183 states to 48183 states and 53509 transitions. [2018-07-24 14:32:59,490 INFO L78 Accepts]: Start accepts. Automaton has 48183 states and 53509 transitions. Word has length 602 [2018-07-24 14:32:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:59,491 INFO L471 AbstractCegarLoop]: Abstraction has 48183 states and 53509 transitions. [2018-07-24 14:32:59,491 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 14:32:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 48183 states and 53509 transitions. [2018-07-24 14:32:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2018-07-24 14:32:59,527 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:59,528 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:32:59,528 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:59,528 INFO L82 PathProgramCache]: Analyzing trace with hash -608903521, now seen corresponding path program 1 times [2018-07-24 14:32:59,528 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:59,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:59,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:59,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:59,529 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:00,350 WARN L169 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-07-24 14:33:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 124 proven. 387 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:33:00,816 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:00,816 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:00,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:00,825 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:01,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2018-07-24 14:33:01,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 124 proven. 387 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:33:03,027 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:33:03,028 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:33:03,028 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:33:03,028 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:33:03,029 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:33:03,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:33:03,029 INFO L87 Difference]: Start difference. First operand 48183 states and 53509 transitions. Second operand 5 states. [2018-07-24 14:33:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:13,235 INFO L93 Difference]: Finished difference Result 99889 states and 110904 transitions. [2018-07-24 14:33:13,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:33:13,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 641 [2018-07-24 14:33:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:13,353 INFO L225 Difference]: With dead ends: 99889 [2018-07-24 14:33:13,353 INFO L226 Difference]: Without dead ends: 51717 [2018-07-24 14:33:13,426 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1277 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:33:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51717 states. [2018-07-24 14:33:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51717 to 49706. [2018-07-24 14:33:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49706 states. [2018-07-24 14:33:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49706 states to 49706 states and 55294 transitions. [2018-07-24 14:33:14,110 INFO L78 Accepts]: Start accepts. Automaton has 49706 states and 55294 transitions. Word has length 641 [2018-07-24 14:33:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:14,110 INFO L471 AbstractCegarLoop]: Abstraction has 49706 states and 55294 transitions. [2018-07-24 14:33:14,110 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:33:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 49706 states and 55294 transitions. [2018-07-24 14:33:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2018-07-24 14:33:14,140 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:14,140 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:33:14,140 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2018700374, now seen corresponding path program 1 times [2018-07-24 14:33:14,141 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:14,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:14,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:14,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:14,142 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 301 proven. 229 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 14:33:14,975 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:14,975 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:14,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:14,982 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:15,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 693 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 14:33:15,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 301 proven. 229 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 14:33:16,161 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:16,161 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:33:16,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:16,176 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:16,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 693 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 14:33:16,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 301 proven. 229 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 14:33:17,515 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:33:17,516 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:33:17,516 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:33:17,517 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:33:17,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:33:17,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:33:17,518 INFO L87 Difference]: Start difference. First operand 49706 states and 55294 transitions. Second operand 9 states. [2018-07-24 14:33:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:26,853 INFO L93 Difference]: Finished difference Result 97114 states and 108960 transitions. [2018-07-24 14:33:26,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 14:33:26,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 715 [2018-07-24 14:33:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:26,952 INFO L225 Difference]: With dead ends: 97114 [2018-07-24 14:33:26,952 INFO L226 Difference]: Without dead ends: 49271 [2018-07-24 14:33:27,016 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2890 GetRequests, 2864 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:33:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49271 states. [2018-07-24 14:33:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49271 to 48893. [2018-07-24 14:33:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48893 states. [2018-07-24 14:33:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48893 states to 48893 states and 53619 transitions. [2018-07-24 14:33:27,645 INFO L78 Accepts]: Start accepts. Automaton has 48893 states and 53619 transitions. Word has length 715 [2018-07-24 14:33:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:27,646 INFO L471 AbstractCegarLoop]: Abstraction has 48893 states and 53619 transitions. [2018-07-24 14:33:27,646 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:33:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 48893 states and 53619 transitions. [2018-07-24 14:33:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2018-07-24 14:33:27,683 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:27,684 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:33:27,684 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:27,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1957785590, now seen corresponding path program 1 times [2018-07-24 14:33:27,684 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:27,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:27,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:27,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:27,685 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 540 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-24 14:33:28,846 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:28,846 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:28,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:28,857 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:29,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 540 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-24 14:33:29,370 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 540 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-24 14:33:29,820 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:29,820 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:33:29,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:29,843 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:30,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 540 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-24 14:33:30,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 540 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-24 14:33:31,390 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:33:31,392 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-07-24 14:33:31,393 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:33:31,394 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:33:31,394 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:33:31,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-07-24 14:33:31,394 INFO L87 Difference]: Start difference. First operand 48893 states and 53619 transitions. Second operand 7 states. [2018-07-24 14:33:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:45,055 INFO L93 Difference]: Finished difference Result 105467 states and 115703 transitions. [2018-07-24 14:33:45,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:33:45,055 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 727 [2018-07-24 14:33:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:45,162 INFO L225 Difference]: With dead ends: 105467 [2018-07-24 14:33:45,163 INFO L226 Difference]: Without dead ends: 56888 [2018-07-24 14:33:45,229 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2927 GetRequests, 2908 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:33:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56888 states. [2018-07-24 14:33:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56888 to 56303. [2018-07-24 14:33:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56303 states. [2018-07-24 14:33:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56303 states to 56303 states and 61435 transitions. [2018-07-24 14:33:45,879 INFO L78 Accepts]: Start accepts. Automaton has 56303 states and 61435 transitions. Word has length 727 [2018-07-24 14:33:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:45,880 INFO L471 AbstractCegarLoop]: Abstraction has 56303 states and 61435 transitions. [2018-07-24 14:33:45,880 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:33:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 56303 states and 61435 transitions. [2018-07-24 14:33:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2018-07-24 14:33:45,909 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:45,909 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:33:45,910 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:45,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1081115958, now seen corresponding path program 1 times [2018-07-24 14:33:45,910 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:45,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:45,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:45,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:45,911 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:47,610 WARN L169 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2018-07-24 14:33:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 205 proven. 725 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 14:33:49,260 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:49,260 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:49,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:49,269 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:49,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 789 proven. 41 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2018-07-24 14:33:50,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 175 proven. 736 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:33:51,461 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:51,461 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:33:51,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:51,480 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:52,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 739 proven. 41 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2018-07-24 14:33:52,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 175 proven. 736 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-07-24 14:33:54,010 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:33:54,011 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9, 8, 9] total 30 [2018-07-24 14:33:54,011 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:33:54,013 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 14:33:54,014 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 14:33:54,014 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2018-07-24 14:33:54,015 INFO L87 Difference]: Start difference. First operand 56303 states and 61435 transitions. Second operand 20 states. [2018-07-24 14:33:58,011 WARN L169 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 25 [2018-07-24 14:34:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:34:43,212 INFO L93 Difference]: Finished difference Result 143614 states and 159771 transitions. [2018-07-24 14:34:43,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-24 14:34:43,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 737 [2018-07-24 14:34:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:34:43,383 INFO L225 Difference]: With dead ends: 143614 [2018-07-24 14:34:43,383 INFO L226 Difference]: Without dead ends: 84723 [2018-07-24 14:34:43,476 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3141 GetRequests, 3018 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5384 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2348, Invalid=12414, Unknown=0, NotChecked=0, Total=14762 [2018-07-24 14:34:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84723 states. [2018-07-24 14:34:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84723 to 80739. [2018-07-24 14:34:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80739 states. [2018-07-24 14:34:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80739 states to 80739 states and 88147 transitions. [2018-07-24 14:34:44,507 INFO L78 Accepts]: Start accepts. Automaton has 80739 states and 88147 transitions. Word has length 737 [2018-07-24 14:34:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:34:44,507 INFO L471 AbstractCegarLoop]: Abstraction has 80739 states and 88147 transitions. [2018-07-24 14:34:44,507 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 14:34:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 80739 states and 88147 transitions. [2018-07-24 14:34:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2018-07-24 14:34:44,532 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:34:44,532 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:34:44,533 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:34:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1835698338, now seen corresponding path program 1 times [2018-07-24 14:34:44,533 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:34:44,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:34:44,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:34:44,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:34:44,534 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:34:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:34:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-07-24 14:34:45,502 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:34:45,502 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:34:45,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:34:45,514 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:34:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:34:45,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:34:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-07-24 14:34:46,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:34:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-07-24 14:34:46,695 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:34:46,695 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:34:46,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:34:46,711 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:34:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:34:47,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:34:47,868 WARN L169 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 17 Received shutdown request... [2018-07-24 14:34:50,147 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 14:34:50,348 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:34:50,349 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:34:50,354 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:34:50,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:34:50 BoogieIcfgContainer [2018-07-24 14:34:50,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:34:50,355 INFO L168 Benchmark]: Toolchain (without parser) took 237264.61 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -58.1 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-07-24 14:34:50,356 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:34:50,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1320.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 129.5 MB). Peak memory consumption was 129.5 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:50,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 275.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:50,358 INFO L168 Benchmark]: Boogie Preprocessor took 642.33 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 893.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:50,359 INFO L168 Benchmark]: RCFGBuilder took 6485.42 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 328.8 MB). Peak memory consumption was 328.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:50,359 INFO L168 Benchmark]: TraceAbstraction took 228535.90 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 516.5 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-07-24 14:34:50,368 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1320.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 129.5 MB). Peak memory consumption was 129.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 275.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 642.33 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 893.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6485.42 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 328.8 MB). Peak memory consumption was 328.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 228535.90 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 516.5 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 100). Cancelled while BasicCegarLoop was analyzing trace of length 767 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 10 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 228.4s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 175.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3110 SDtfs, 40738 SDslu, 4952 SDs, 0 SdLazy, 62130 SolverSat, 11393 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 148.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22862 GetRequests, 22563 SyntacticMatches, 38 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5848 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80739occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 12045 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 27.2s InterpolantComputationTime, 18269 NumberOfCodeBlocks, 18269 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 29467 ConstructedInterpolants, 0 QuantifiedInterpolants, 59047156 SizeOfPredicates, 28 NumberOfNonLiveVariables, 16031 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 52 InterpolantComputations, 6 PerfectInterpolantSequences, 32551/37056 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/Problem15_label04_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-34-50-381.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label04_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-34-50-381.csv Completed graceful shutdown