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/Problem14_label50_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:30:02,052 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:30:02,054 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:30:02,067 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:30:02,068 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:30:02,069 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:30:02,070 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:30:02,072 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:30:02,074 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:30:02,076 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:30:02,077 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:30:02,078 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:30:02,079 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:30:02,083 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:30:02,089 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:30:02,090 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:30:02,091 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:30:02,095 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:30:02,099 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:30:02,103 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:30:02,104 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:30:02,108 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:30:02,111 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:30:02,111 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:30:02,113 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:30:02,114 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:30:02,115 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:30:02,116 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:30:02,119 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:30:02,121 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:30:02,121 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:30:02,123 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-24 14:30:02,128 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 14:30:02,154 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:30:02,154 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:30:02,155 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:30:02,155 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:30:02,155 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:30:02,155 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:30:02,156 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:30:02,156 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:30:02,156 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:30:02,156 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:30:02,156 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:30:02,157 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:30:02,157 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:30:02,158 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:30:02,158 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:30:02,158 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:30:02,158 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:30:02,158 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:30:02,159 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:30:02,159 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:30:02,159 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:30:02,159 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:30:02,159 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:30:02,160 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:30:02,160 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:30:02,160 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:30:02,160 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:30:02,160 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:30:02,161 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:30:02,161 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:30:02,161 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:30:02,161 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:30:02,161 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:30:02,206 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:30:02,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:30:02,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:30:02,231 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:30:02,232 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:30:02,232 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label50_true-unreach-call_false-termination.c [2018-07-24 14:30:02,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad5e1b53e/d33c357dfd5846c8890562235f0ae2f3/FLAG616cee499 [2018-07-24 14:30:02,893 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:30:02,894 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label50_true-unreach-call_false-termination.c [2018-07-24 14:30:02,930 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad5e1b53e/d33c357dfd5846c8890562235f0ae2f3/FLAG616cee499 [2018-07-24 14:30:02,953 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad5e1b53e/d33c357dfd5846c8890562235f0ae2f3 [2018-07-24 14:30:02,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:30:02,966 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:30:02,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:30:02,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:30:02,973 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:30:02,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:30:02" (1/1) ... [2018-07-24 14:30:02,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e5971b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:02, skipping insertion in model container [2018-07-24 14:30:02,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:30:02" (1/1) ... [2018-07-24 14:30:03,231 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:30:03,610 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:30:03,627 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:30:03,803 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:30:03,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03 WrapperNode [2018-07-24 14:30:03,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:30:03,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:30:03,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:30:03,862 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:30:03,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:03,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:30:04,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:30:04,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:30:04,002 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:30:04,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (1/1) ... [2018-07-24 14:30:04,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:30:04,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:30:04,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:30:04,292 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:30:04,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (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 14:30:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-24 14:30:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-24 14:30:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:30:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:30:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:30:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:30:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:30:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:30:08,306 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:30:08,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:30:08 BoogieIcfgContainer [2018-07-24 14:30:08,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:30:08,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:30:08,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:30:08,313 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:30:08,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:30:02" (1/3) ... [2018-07-24 14:30:08,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb45850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:30:08, skipping insertion in model container [2018-07-24 14:30:08,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:03" (2/3) ... [2018-07-24 14:30:08,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb45850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:30:08, skipping insertion in model container [2018-07-24 14:30:08,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:30:08" (3/3) ... [2018-07-24 14:30:08,317 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label50_true-unreach-call_false-termination.c [2018-07-24 14:30:08,330 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:30:08,341 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:30:08,395 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:30:08,396 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:30:08,396 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:30:08,396 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:30:08,396 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:30:08,396 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:30:08,399 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:30:08,399 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:30:08,399 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:30:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 14:30:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-24 14:30:08,442 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:08,443 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:08,443 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash 508778684, now seen corresponding path program 1 times [2018-07-24 14:30:08,452 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:08,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:08,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:08,507 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:08,914 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 14:30:08,916 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:30:08,917 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:30:08,917 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:08,924 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:30:08,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:30:08,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:30:08,945 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-07-24 14:30:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:11,870 INFO L93 Difference]: Finished difference Result 878 states and 1595 transitions. [2018-07-24 14:30:11,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:30:11,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-07-24 14:30:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:11,895 INFO L225 Difference]: With dead ends: 878 [2018-07-24 14:30:11,895 INFO L226 Difference]: Without dead ends: 617 [2018-07-24 14:30:11,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 14:30:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2018-07-24 14:30:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2018-07-24 14:30:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2018-07-24 14:30:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1129 transitions. [2018-07-24 14:30:12,005 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1129 transitions. Word has length 44 [2018-07-24 14:30:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:12,006 INFO L471 AbstractCegarLoop]: Abstraction has 617 states and 1129 transitions. [2018-07-24 14:30:12,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:30:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1129 transitions. [2018-07-24 14:30:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-24 14:30:12,023 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:12,024 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:12,024 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:12,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1863637092, now seen corresponding path program 1 times [2018-07-24 14:30:12,024 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:12,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:12,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:12,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:12,026 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:12,407 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:30:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:12,489 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:30:12,489 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:30:12,489 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:12,492 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:30:12,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:30:12,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:30:12,492 INFO L87 Difference]: Start difference. First operand 617 states and 1129 transitions. Second operand 6 states. [2018-07-24 14:30:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:15,126 INFO L93 Difference]: Finished difference Result 1620 states and 3026 transitions. [2018-07-24 14:30:15,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:30:15,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-07-24 14:30:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:15,136 INFO L225 Difference]: With dead ends: 1620 [2018-07-24 14:30:15,136 INFO L226 Difference]: Without dead ends: 1009 [2018-07-24 14:30:15,140 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:30:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2018-07-24 14:30:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 997. [2018-07-24 14:30:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2018-07-24 14:30:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1718 transitions. [2018-07-24 14:30:15,220 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1718 transitions. Word has length 164 [2018-07-24 14:30:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:15,221 INFO L471 AbstractCegarLoop]: Abstraction has 997 states and 1718 transitions. [2018-07-24 14:30:15,221 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:30:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1718 transitions. [2018-07-24 14:30:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-07-24 14:30:15,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:15,234 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:30:15,234 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash 436878865, now seen corresponding path program 1 times [2018-07-24 14:30:15,234 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:15,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:15,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:15,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:15,236 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:15,830 WARN L169 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-07-24 14:30:16,082 WARN L169 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 14:30:16,533 WARN L169 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2018-07-24 14:30:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 147 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:17,364 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:17,365 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:30:17,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:17,385 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:17,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-07-24 14:30:18,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:18,543 WARN L169 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:30:18,717 WARN L169 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:30:18,821 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 14:30:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 74 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:30:19,563 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:30:19,563 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2018-07-24 14:30:19,563 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:19,564 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:30:19,565 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:30:19,565 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:30:19,568 INFO L87 Difference]: Start difference. First operand 997 states and 1718 transitions. Second operand 5 states. [2018-07-24 14:30:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:23,737 INFO L93 Difference]: Finished difference Result 2709 states and 4612 transitions. [2018-07-24 14:30:23,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:30:23,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2018-07-24 14:30:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:23,751 INFO L225 Difference]: With dead ends: 2709 [2018-07-24 14:30:23,751 INFO L226 Difference]: Without dead ends: 1718 [2018-07-24 14:30:23,757 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 550 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:30:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2018-07-24 14:30:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1687. [2018-07-24 14:30:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1687 states. [2018-07-24 14:30:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2745 transitions. [2018-07-24 14:30:23,832 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2745 transitions. Word has length 277 [2018-07-24 14:30:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:23,833 INFO L471 AbstractCegarLoop]: Abstraction has 1687 states and 2745 transitions. [2018-07-24 14:30:23,833 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:30:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2745 transitions. [2018-07-24 14:30:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-07-24 14:30:23,846 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:23,846 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:23,846 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash -79068604, now seen corresponding path program 1 times [2018-07-24 14:30:23,847 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:23,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:23,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:23,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:23,848 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:24,600 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:30:24,827 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:30:25,144 WARN L169 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 14:30:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 199 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:30:25,675 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:25,675 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 14:30:25,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:25,683 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:25,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 303 proven. 53 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-07-24 14:30:26,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:26,365 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 14:30:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 121 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:30:26,986 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:26,986 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 14:30:27,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:27,007 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:27,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 303 proven. 53 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-07-24 14:30:27,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 121 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:30:28,500 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:28,500 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-07-24 14:30:28,500 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:28,503 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 14:30:28,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 14:30:28,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:30:28,505 INFO L87 Difference]: Start difference. First operand 1687 states and 2745 transitions. Second operand 15 states. [2018-07-24 14:30:32,066 WARN L169 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2018-07-24 14:30:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:35,860 INFO L93 Difference]: Finished difference Result 4375 states and 7211 transitions. [2018-07-24 14:30:35,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-24 14:30:35,863 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 362 [2018-07-24 14:30:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:35,876 INFO L225 Difference]: With dead ends: 4375 [2018-07-24 14:30:35,877 INFO L226 Difference]: Without dead ends: 2491 [2018-07-24 14:30:35,887 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1492 GetRequests, 1445 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2018-07-24 14:30:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2018-07-24 14:30:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 2167. [2018-07-24 14:30:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2167 states. [2018-07-24 14:30:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 3046 transitions. [2018-07-24 14:30:35,952 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 3046 transitions. Word has length 362 [2018-07-24 14:30:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:35,952 INFO L471 AbstractCegarLoop]: Abstraction has 2167 states and 3046 transitions. [2018-07-24 14:30:35,952 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 14:30:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 3046 transitions. [2018-07-24 14:30:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-07-24 14:30:35,966 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:35,966 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:35,966 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:35,967 INFO L82 PathProgramCache]: Analyzing trace with hash 445140797, now seen corresponding path program 1 times [2018-07-24 14:30:35,967 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:35,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:35,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:35,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:35,968 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:36,347 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-07-24 14:30:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 297 proven. 40 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-07-24 14:30:37,216 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:37,216 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 14:30:37,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:37,224 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:37,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2018-07-24 14:30:37,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 111 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 14:30:37,911 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:30:37,912 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 16 [2018-07-24 14:30:37,912 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:37,912 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:30:37,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:30:37,913 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:30:37,913 INFO L87 Difference]: Start difference. First operand 2167 states and 3046 transitions. Second operand 5 states. [2018-07-24 14:30:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:40,331 INFO L93 Difference]: Finished difference Result 6792 states and 9456 transitions. [2018-07-24 14:30:40,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:30:40,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 387 [2018-07-24 14:30:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:40,361 INFO L225 Difference]: With dead ends: 6792 [2018-07-24 14:30:40,362 INFO L226 Difference]: Without dead ends: 4631 [2018-07-24 14:30:40,378 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 769 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:30:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2018-07-24 14:30:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 4378. [2018-07-24 14:30:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4378 states. [2018-07-24 14:30:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 5596 transitions. [2018-07-24 14:30:40,500 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 5596 transitions. Word has length 387 [2018-07-24 14:30:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:40,500 INFO L471 AbstractCegarLoop]: Abstraction has 4378 states and 5596 transitions. [2018-07-24 14:30:40,500 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:30:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 5596 transitions. [2018-07-24 14:30:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2018-07-24 14:30:40,519 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:40,520 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:40,520 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash -347723516, now seen corresponding path program 1 times [2018-07-24 14:30:40,520 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:40,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:40,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:40,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:40,522 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 380 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-07-24 14:30:41,150 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:41,150 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:30:41,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:41,158 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:41,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 666 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 14:30:41,755 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:42,059 WARN L169 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:30:42,201 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-07-24 14:30:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 380 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-07-24 14:30:42,715 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:42,715 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 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:30:42,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:42,732 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:43,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 660 proven. 8 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 14:30:43,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 380 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-07-24 14:30:44,301 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:44,302 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-07-24 14:30:44,302 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:44,303 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:30:44,303 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:30:44,303 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:30:44,304 INFO L87 Difference]: Start difference. First operand 4378 states and 5596 transitions. Second operand 7 states. [2018-07-24 14:30:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:47,176 INFO L93 Difference]: Finished difference Result 11334 states and 14772 transitions. [2018-07-24 14:30:47,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:30:47,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 498 [2018-07-24 14:30:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:47,208 INFO L225 Difference]: With dead ends: 11334 [2018-07-24 14:30:47,208 INFO L226 Difference]: Without dead ends: 6962 [2018-07-24 14:30:47,235 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2012 GetRequests, 1982 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:30:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2018-07-24 14:30:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6086. [2018-07-24 14:30:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6086 states. [2018-07-24 14:30:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 7338 transitions. [2018-07-24 14:30:47,370 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 7338 transitions. Word has length 498 [2018-07-24 14:30:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:47,371 INFO L471 AbstractCegarLoop]: Abstraction has 6086 states and 7338 transitions. [2018-07-24 14:30:47,371 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:30:47,371 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 7338 transitions. [2018-07-24 14:30:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-07-24 14:30:47,387 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:47,387 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:47,387 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1545202383, now seen corresponding path program 1 times [2018-07-24 14:30:47,388 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:47,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:47,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:47,389 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 516 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-07-24 14:30:48,626 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:48,626 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 14:30:48,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:48,634 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:48,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 876 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-07-24 14:30:49,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 510 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-07-24 14:30:50,107 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:50,108 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 14:30:50,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:50,126 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:50,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 668 proven. 210 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-07-24 14:30:51,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 221 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:30:51,880 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:51,881 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-07-24 14:30:51,881 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:51,882 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:30:51,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:30:51,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:30:51,883 INFO L87 Difference]: Start difference. First operand 6086 states and 7338 transitions. Second operand 13 states. [2018-07-24 14:30:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:58,146 INFO L93 Difference]: Finished difference Result 12797 states and 15846 transitions. [2018-07-24 14:30:58,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 14:30:58,148 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 583 [2018-07-24 14:30:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:58,183 INFO L225 Difference]: With dead ends: 12797 [2018-07-24 14:30:58,183 INFO L226 Difference]: Without dead ends: 6514 [2018-07-24 14:30:58,212 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2364 GetRequests, 2322 SyntacticMatches, 17 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-07-24 14:30:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6514 states. [2018-07-24 14:30:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6514 to 6273. [2018-07-24 14:30:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6273 states. [2018-07-24 14:30:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 7366 transitions. [2018-07-24 14:30:58,507 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 7366 transitions. Word has length 583 [2018-07-24 14:30:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:58,508 INFO L471 AbstractCegarLoop]: Abstraction has 6273 states and 7366 transitions. [2018-07-24 14:30:58,508 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:30:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 7366 transitions. [2018-07-24 14:30:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2018-07-24 14:30:58,528 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:58,529 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:58,529 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash 120838341, now seen corresponding path program 2 times [2018-07-24 14:30:58,529 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:58,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:58,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:58,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:58,531 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:59,238 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:30:59,458 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:30:59,684 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:31:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 542 proven. 534 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-07-24 14:31:00,859 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:00,859 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 14:31:00,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:31:00,866 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:31:01,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:31:01,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:31:01,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 928 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-07-24 14:31:01,560 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:01,676 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:31:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 536 proven. 112 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-07-24 14:31:02,458 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:02,458 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 14:31:02,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:31:02,476 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:31:02,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:31:02,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:31:02,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 913 proven. 17 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-07-24 14:31:03,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:04,200 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-07-24 14:31:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 215 proven. 748 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-07-24 14:31:06,310 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:06,311 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-07-24 14:31:06,311 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:06,313 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 14:31:06,313 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 14:31:06,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2018-07-24 14:31:06,314 INFO L87 Difference]: Start difference. First operand 6273 states and 7366 transitions. Second operand 18 states. [2018-07-24 14:31:08,060 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2018-07-24 14:31:09,895 WARN L169 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-07-24 14:31:12,351 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2018-07-24 14:31:12,910 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-07-24 14:31:16,237 WARN L169 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2018-07-24 14:31:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:16,928 INFO L93 Difference]: Finished difference Result 15171 states and 18521 transitions. [2018-07-24 14:31:16,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-24 14:31:16,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 609 [2018-07-24 14:31:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:16,964 INFO L225 Difference]: With dead ends: 15171 [2018-07-24 14:31:16,964 INFO L226 Difference]: Without dead ends: 8904 [2018-07-24 14:31:16,989 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2513 GetRequests, 2434 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2018-07-24 14:31:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8904 states. [2018-07-24 14:31:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8904 to 8105. [2018-07-24 14:31:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8105 states. [2018-07-24 14:31:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8105 states to 8105 states and 9286 transitions. [2018-07-24 14:31:17,156 INFO L78 Accepts]: Start accepts. Automaton has 8105 states and 9286 transitions. Word has length 609 [2018-07-24 14:31:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:17,157 INFO L471 AbstractCegarLoop]: Abstraction has 8105 states and 9286 transitions. [2018-07-24 14:31:17,157 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 14:31:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 8105 states and 9286 transitions. [2018-07-24 14:31:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2018-07-24 14:31:17,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:17,177 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:17,177 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -362867723, now seen corresponding path program 1 times [2018-07-24 14:31:17,177 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:17,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:17,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 14:31:17,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:17,179 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 543 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-07-24 14:31:18,124 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:18,124 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 14:31:18,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:18,132 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:18,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 949 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-07-24 14:31:18,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:19,064 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 14:31:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 543 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-07-24 14:31:19,453 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:19,453 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 14:31:19,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:19,470 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:19,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 949 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-07-24 14:31:20,221 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 543 proven. 119 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-07-24 14:31:20,606 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:20,607 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:31:20,607 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:20,609 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:31:20,609 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:31:20,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:31:20,609 INFO L87 Difference]: Start difference. First operand 8105 states and 9286 transitions. Second operand 7 states. [2018-07-24 14:31:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:23,734 INFO L93 Difference]: Finished difference Result 21787 states and 28710 transitions. [2018-07-24 14:31:23,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:31:23,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 683 [2018-07-24 14:31:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:23,820 INFO L225 Difference]: With dead ends: 21787 [2018-07-24 14:31:23,821 INFO L226 Difference]: Without dead ends: 13871 [2018-07-24 14:31:23,879 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2748 GetRequests, 2733 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:31:23,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13871 states. [2018-07-24 14:31:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13871 to 13512. [2018-07-24 14:31:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13512 states. [2018-07-24 14:31:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 15832 transitions. [2018-07-24 14:31:24,242 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 15832 transitions. Word has length 683 [2018-07-24 14:31:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:24,245 INFO L471 AbstractCegarLoop]: Abstraction has 13512 states and 15832 transitions. [2018-07-24 14:31:24,245 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:31:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 15832 transitions. [2018-07-24 14:31:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2018-07-24 14:31:24,274 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:24,275 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:24,275 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:24,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2118881240, now seen corresponding path program 1 times [2018-07-24 14:31:24,276 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:24,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:24,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:24,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:24,277 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:25,618 WARN L169 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 14:31:25,967 WARN L169 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 14:31:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2230 backedges. 796 proven. 835 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-07-24 14:31:27,042 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:27,042 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 14:31:27,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:27,055 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:27,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:27,850 WARN L169 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:31:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2230 backedges. 1329 proven. 2 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2018-07-24 14:31:28,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:28,511 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:31:28,647 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 14:31:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2230 backedges. 784 proven. 112 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-07-24 14:31:29,508 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:29,508 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:29,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:29,528 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:30,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2230 backedges. 1321 proven. 10 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2018-07-24 14:31:30,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2230 backedges. 289 proven. 1075 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-07-24 14:31:32,234 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:32,235 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-07-24 14:31:32,235 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:32,236 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:31:32,236 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:31:32,236 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-07-24 14:31:32,237 INFO L87 Difference]: Start difference. First operand 13512 states and 15832 transitions. Second operand 17 states. [2018-07-24 14:31:40,635 WARN L169 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2018-07-24 14:31:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:41,175 INFO L93 Difference]: Finished difference Result 26738 states and 33289 transitions. [2018-07-24 14:31:41,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-24 14:31:41,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 772 [2018-07-24 14:31:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:41,234 INFO L225 Difference]: With dead ends: 26738 [2018-07-24 14:31:41,235 INFO L226 Difference]: Without dead ends: 12631 [2018-07-24 14:31:41,296 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3171 GetRequests, 3094 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1098, Invalid=4014, Unknown=0, NotChecked=0, Total=5112 [2018-07-24 14:31:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2018-07-24 14:31:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12231. [2018-07-24 14:31:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12231 states. [2018-07-24 14:31:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 13951 transitions. [2018-07-24 14:31:41,565 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 13951 transitions. Word has length 772 [2018-07-24 14:31:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:41,566 INFO L471 AbstractCegarLoop]: Abstraction has 12231 states and 13951 transitions. [2018-07-24 14:31:41,566 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:31:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 13951 transitions. [2018-07-24 14:31:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-07-24 14:31:41,584 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:41,584 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:31:41,584 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash 915049733, now seen corresponding path program 1 times [2018-07-24 14:31:41,585 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:41,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:41,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:41,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:41,586 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 791 proven. 845 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-07-24 14:31:45,170 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:45,170 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:45,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:45,178 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:45,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1269 proven. 2 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-07-24 14:31:45,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 748 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-07-24 14:31:46,315 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:46,315 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:46,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:46,332 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:46,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1269 proven. 2 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-07-24 14:31:47,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 748 proven. 119 refuted. 0 times theorem prover too weak. 1103 trivial. 0 not checked. [2018-07-24 14:31:47,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:47,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-07-24 14:31:47,749 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:47,750 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 14:31:47,751 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 14:31:47,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:31:47,751 INFO L87 Difference]: Start difference. First operand 12231 states and 13951 transitions. Second operand 20 states. [2018-07-24 14:31:56,749 WARN L169 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2018-07-24 14:31:57,451 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:32:00,742 WARN L169 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-07-24 14:32:01,172 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-07-24 14:32:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:03,273 INFO L93 Difference]: Finished difference Result 26338 states and 30615 transitions. [2018-07-24 14:32:03,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-24 14:32:03,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 843 [2018-07-24 14:32:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:03,317 INFO L225 Difference]: With dead ends: 26338 [2018-07-24 14:32:03,317 INFO L226 Difference]: Without dead ends: 13970 [2018-07-24 14:32:03,359 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3536 GetRequests, 3432 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1374, Invalid=8526, Unknown=0, NotChecked=0, Total=9900 [2018-07-24 14:32:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13970 states. [2018-07-24 14:32:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13970 to 13645. [2018-07-24 14:32:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13645 states. [2018-07-24 14:32:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13645 states to 13645 states and 15224 transitions. [2018-07-24 14:32:03,622 INFO L78 Accepts]: Start accepts. Automaton has 13645 states and 15224 transitions. Word has length 843 [2018-07-24 14:32:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:03,622 INFO L471 AbstractCegarLoop]: Abstraction has 13645 states and 15224 transitions. [2018-07-24 14:32:03,623 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 14:32:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 13645 states and 15224 transitions. [2018-07-24 14:32:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2018-07-24 14:32:03,658 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:03,659 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:03,659 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:03,660 INFO L82 PathProgramCache]: Analyzing trace with hash 739665672, now seen corresponding path program 1 times [2018-07-24 14:32:03,660 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:03,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:03,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:03,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:03,661 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:05,278 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2018-07-24 14:32:05,416 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-07-24 14:32:05,580 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-07-24 14:32:05,726 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-07-24 14:32:05,905 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-07-24 14:32:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3767 backedges. 1218 proven. 2383 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2018-07-24 14:32:10,710 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:10,710 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:10,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:10,725 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:11,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3767 backedges. 1170 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-07-24 14:32:11,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3767 backedges. 1170 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-07-24 14:32:13,490 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:13,490 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:13,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:13,506 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:14,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3767 backedges. 2282 proven. 6 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2018-07-24 14:32:15,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3767 backedges. 1537 proven. 271 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-07-24 14:32:16,770 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:16,773 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 5, 5, 7, 8] total 50 [2018-07-24 14:32:16,773 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:16,775 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-24 14:32:16,775 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-24 14:32:16,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2018-07-24 14:32:16,777 INFO L87 Difference]: Start difference. First operand 13645 states and 15224 transitions. Second operand 37 states. [2018-07-24 14:32:18,644 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2018-07-24 14:32:20,443 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2018-07-24 14:32:21,357 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2018-07-24 14:32:21,681 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-07-24 14:32:21,913 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2018-07-24 14:32:22,117 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2018-07-24 14:32:26,058 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2018-07-24 14:32:28,477 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-07-24 14:32:28,799 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2018-07-24 14:32:28,975 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2018-07-24 14:32:30,232 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2018-07-24 14:32:30,742 WARN L169 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2018-07-24 14:32:31,741 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2018-07-24 14:32:32,502 WARN L169 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2018-07-24 14:32:35,119 WARN L169 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2018-07-24 14:32:35,418 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2018-07-24 14:32:35,926 WARN L169 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2018-07-24 14:32:37,954 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2018-07-24 14:32:38,821 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2018-07-24 14:32:40,349 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2018-07-24 14:32:41,416 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2018-07-24 14:32:42,439 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2018-07-24 14:32:42,916 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-07-24 14:32:43,121 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2018-07-24 14:32:43,645 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2018-07-24 14:32:43,938 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2018-07-24 14:32:45,162 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2018-07-24 14:32:46,168 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-07-24 14:32:46,392 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-07-24 14:32:46,686 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-07-24 14:32:47,651 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2018-07-24 14:32:49,890 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2018-07-24 14:32:50,834 WARN L169 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 20 [2018-07-24 14:32:51,135 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2018-07-24 14:32:51,411 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-07-24 14:32:51,917 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2018-07-24 14:32:54,663 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2018-07-24 14:32:56,277 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-07-24 14:33:02,213 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2018-07-24 14:33:02,436 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2018-07-24 14:33:04,455 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2018-07-24 14:33:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:06,207 INFO L93 Difference]: Finished difference Result 31694 states and 40487 transitions. [2018-07-24 14:33:06,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-24 14:33:06,208 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1100 [2018-07-24 14:33:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:06,299 INFO L225 Difference]: With dead ends: 31694 [2018-07-24 14:33:06,299 INFO L226 Difference]: Without dead ends: 16852 [2018-07-24 14:33:06,405 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4647 GetRequests, 4442 SyntacticMatches, 7 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13827 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=5057, Invalid=34743, Unknown=0, NotChecked=0, Total=39800 [2018-07-24 14:33:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16852 states. [2018-07-24 14:33:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16852 to 14450. [2018-07-24 14:33:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14450 states. [2018-07-24 14:33:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14450 states to 14450 states and 16471 transitions. [2018-07-24 14:33:06,909 INFO L78 Accepts]: Start accepts. Automaton has 14450 states and 16471 transitions. Word has length 1100 [2018-07-24 14:33:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:06,911 INFO L471 AbstractCegarLoop]: Abstraction has 14450 states and 16471 transitions. [2018-07-24 14:33:06,911 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-24 14:33:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 14450 states and 16471 transitions. [2018-07-24 14:33:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2018-07-24 14:33:06,931 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:06,932 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:33:06,932 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:06,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2095364520, now seen corresponding path program 1 times [2018-07-24 14:33:06,932 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:06,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:06,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:06,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:06,934 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 1686 proven. 355 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2018-07-24 14:33:08,455 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:08,455 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:08,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:08,466 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:08,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 2471 proven. 6 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2018-07-24 14:33:09,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 1686 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-07-24 14:33:10,705 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:10,705 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:33:10,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:10,731 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:11,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 2471 proven. 6 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2018-07-24 14:33:12,143 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 1686 proven. 359 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2018-07-24 14:33:13,054 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:33:13,055 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 14 [2018-07-24 14:33:13,055 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:33:13,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:33:13,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:33:13,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:33:13,057 INFO L87 Difference]: Start difference. First operand 14450 states and 16471 transitions. Second operand 9 states. [2018-07-24 14:33:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:18,853 INFO L93 Difference]: Finished difference Result 32150 states and 37295 transitions. [2018-07-24 14:33:18,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-24 14:33:18,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1148 [2018-07-24 14:33:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:18,928 INFO L225 Difference]: With dead ends: 32150 [2018-07-24 14:33:18,928 INFO L226 Difference]: Without dead ends: 17889 [2018-07-24 14:33:18,995 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4621 GetRequests, 4594 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2018-07-24 14:33:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17889 states. [2018-07-24 14:33:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17889 to 17195. [2018-07-24 14:33:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17195 states. [2018-07-24 14:33:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17195 states to 17195 states and 19536 transitions. [2018-07-24 14:33:19,529 INFO L78 Accepts]: Start accepts. Automaton has 17195 states and 19536 transitions. Word has length 1148 [2018-07-24 14:33:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:19,530 INFO L471 AbstractCegarLoop]: Abstraction has 17195 states and 19536 transitions. [2018-07-24 14:33:19,530 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:33:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 17195 states and 19536 transitions. [2018-07-24 14:33:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1706 [2018-07-24 14:33:19,590 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:19,591 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:33:19,591 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:19,592 INFO L82 PathProgramCache]: Analyzing trace with hash 121097201, now seen corresponding path program 1 times [2018-07-24 14:33:19,592 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:19,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:19,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:19,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:19,593 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8929 backedges. 1944 proven. 5334 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2018-07-24 14:33:25,969 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:25,969 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:25,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:25,976 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:26,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8929 backedges. 2885 proven. 87 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-07-24 14:33:27,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8929 backedges. 2963 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-07-24 14:33:31,485 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:31,485 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 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:33:31,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:31,501 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:32,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8929 backedges. 2885 proven. 87 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-07-24 14:33:33,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8929 backedges. 2963 proven. 122 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-07-24 14:33:36,419 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:33:36,421 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8, 9, 8, 9] total 39 [2018-07-24 14:33:36,421 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:33:36,423 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-24 14:33:36,423 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-24 14:33:36,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 14:33:36,423 INFO L87 Difference]: Start difference. First operand 17195 states and 19536 transitions. Second operand 33 states. [2018-07-24 14:33:40,298 WARN L169 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-07-24 14:33:40,507 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-07-24 14:33:41,891 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-07-24 14:33:42,836 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2018-07-24 14:33:43,651 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-07-24 14:33:44,414 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-07-24 14:33:46,389 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2018-07-24 14:33:46,629 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 30 [2018-07-24 14:33:52,463 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2018-07-24 14:33:55,351 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2018-07-24 14:33:57,083 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 Received shutdown request... [2018-07-24 14:33:57,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-24 14:33:57,382 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:33:57,386 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:33:57,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:33:57 BoogieIcfgContainer [2018-07-24 14:33:57,386 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:33:57,387 INFO L168 Benchmark]: Toolchain (without parser) took 234422.55 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -988.3 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-07-24 14:33:57,388 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 14:33:57,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 894.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:33:57,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 139.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 14:33:57,389 INFO L168 Benchmark]: Boogie Preprocessor took 289.72 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -865.7 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. [2018-07-24 14:33:57,390 INFO L168 Benchmark]: RCFGBuilder took 4016.15 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 144.3 MB). Peak memory consumption was 144.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:33:57,391 INFO L168 Benchmark]: TraceAbstraction took 229078.05 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -330.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-07-24 14:33:57,394 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 894.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 139.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 289.72 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -865.7 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4016.15 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 144.3 MB). Peak memory consumption was 144.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229078.05 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -330.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 115). Cancelled while BasicCegarLoop was constructing difference of abstraction (17195states) and interpolant automaton (currently 63 states, 33 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 100 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 229.0s OverallTime, 14 OverallIterations, 14 TraceHistogramMax, 144.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1467 SDtfs, 65731 SDslu, 5737 SDs, 0 SdLazy, 74651 SolverSat, 10721 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 87.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35431 GetRequests, 34644 SyntacticMatches, 92 SemanticMatches, 694 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23408 ImplicationChecksByTransitivity, 57.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17195occurred in iteration=13, 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: 2.9s AutomataMinimizationTime, 13 MinimizatonAttempts, 6716 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 56.5s InterpolantComputationTime, 26445 NumberOfCodeBlocks, 26445 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 43657 ConstructedInterpolants, 12 QuantifiedInterpolants, 179726087 SizeOfPredicates, 71 NumberOfNonLiveVariables, 24814 ConjunctsInSsa, 380 ConjunctsInUnsatCore, 58 InterpolantComputations, 4 PerfectInterpolantSequences, 113982/131450 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/Problem14_label50_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-33-57-406.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label50_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-33-57-406.csv Completed graceful shutdown