java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:39:40,920 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:39:40,922 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:39:40,934 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:39:40,934 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:39:40,935 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:39:40,937 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:39:40,938 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:39:40,940 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:39:40,941 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:39:40,942 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:39:40,942 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:39:40,944 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:39:40,945 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:39:40,947 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:39:40,947 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:39:40,948 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:39:40,950 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:39:40,952 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:39:40,954 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:39:40,955 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:39:40,956 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:39:40,958 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:39:40,959 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:39:40,959 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:39:40,960 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:39:40,961 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:39:40,962 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:39:40,963 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:39:40,964 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:39:40,964 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:39:40,965 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:39:40,965 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:39:40,965 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:39:40,966 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:39:40,967 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:39:40,967 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 14:39:40,983 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:39:40,983 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:39:40,985 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:39:40,985 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:39:40,986 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:39:40,986 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:39:40,986 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:39:40,986 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:39:40,986 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:39:40,987 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:39:40,987 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:39:40,987 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:39:40,988 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:39:40,988 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:39:40,988 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:39:40,988 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:39:40,989 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:39:40,990 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:39:40,990 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:39:40,990 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:39:40,990 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:39:40,990 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:39:40,991 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:39:40,991 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:39:40,991 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:39:40,991 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:39:40,992 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:39:40,992 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:39:40,992 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:39:40,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:39:40,993 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:39:40,993 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:39:40,993 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:39:41,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:39:41,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:39:41,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:39:41,082 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:39:41,083 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:39:41,084 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c [2018-07-24 14:39:41,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe39ed431/7c4cf682a6c846c09ca52675ef5b0b8c/FLAGe430415de [2018-07-24 14:39:41,846 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:39:41,847 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c [2018-07-24 14:39:41,877 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe39ed431/7c4cf682a6c846c09ca52675ef5b0b8c/FLAGe430415de [2018-07-24 14:39:41,899 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe39ed431/7c4cf682a6c846c09ca52675ef5b0b8c [2018-07-24 14:39:41,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:39:41,913 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:39:41,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:39:41,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:39:41,921 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:39:41,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:39:41" (1/1) ... [2018-07-24 14:39:41,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536648b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:41, skipping insertion in model container [2018-07-24 14:39:41,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:39:41" (1/1) ... [2018-07-24 14:39:42,202 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:39:42,840 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:39:42,857 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:39:43,202 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:39:43,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43 WrapperNode [2018-07-24 14:39:43,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:39:43,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:39:43,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:39:43,362 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:39:43,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:43,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:43,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:39:43,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:39:43,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:39:43,618 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:39:44,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:44,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:44,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:44,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:44,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:44,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:44,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... [2018-07-24 14:39:44,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:39:44,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:39:44,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:39:44,222 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:39:44,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:39:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:39:44,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:39:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:39:44,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:39:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:39:44,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:39:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:39:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:39:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:39:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:39:52,897 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:39:52,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:39:52 BoogieIcfgContainer [2018-07-24 14:39:52,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:39:52,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:39:52,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:39:52,902 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:39:52,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:39:41" (1/3) ... [2018-07-24 14:39:52,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2181c972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:39:52, skipping insertion in model container [2018-07-24 14:39:52,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:39:43" (2/3) ... [2018-07-24 14:39:52,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2181c972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:39:52, skipping insertion in model container [2018-07-24 14:39:52,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:39:52" (3/3) ... [2018-07-24 14:39:52,905 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label59_true-unreach-call.c [2018-07-24 14:39:52,913 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:39:52,922 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:39:52,978 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:39:52,979 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:39:52,980 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:39:52,980 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:39:52,980 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:39:52,980 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:39:52,980 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:39:52,980 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:39:52,981 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:39:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 14:39:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-24 14:39:53,023 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:39:53,024 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:39:53,025 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:39:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash -511197975, now seen corresponding path program 1 times [2018-07-24 14:39:53,033 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:39:53,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:39:53,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:53,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:39:53,083 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:39:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:53,579 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-07-24 14:39:53,603 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 14:39:53,606 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:39:53,606 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:39:53,606 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:39:53,613 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:39:53,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:39:53,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:39:53,632 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-07-24 14:40:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:00,993 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-07-24 14:40:00,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:40:00,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-07-24 14:40:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:01,025 INFO L225 Difference]: With dead ends: 1558 [2018-07-24 14:40:01,025 INFO L226 Difference]: Without dead ends: 1114 [2018-07-24 14:40:01,036 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:40:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-07-24 14:40:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 759. [2018-07-24 14:40:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-07-24 14:40:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1355 transitions. [2018-07-24 14:40:01,153 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1355 transitions. Word has length 61 [2018-07-24 14:40:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:01,153 INFO L471 AbstractCegarLoop]: Abstraction has 759 states and 1355 transitions. [2018-07-24 14:40:01,154 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:40:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1355 transitions. [2018-07-24 14:40:01,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-24 14:40:01,169 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:01,170 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:40:01,170 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:40:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1113551139, now seen corresponding path program 1 times [2018-07-24 14:40:01,171 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:01,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:01,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:01,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:01,174 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:01,498 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:40:01,498 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:40:01,498 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:40:01,500 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:40:01,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:40:01,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:40:01,501 INFO L87 Difference]: Start difference. First operand 759 states and 1355 transitions. Second operand 5 states. [2018-07-24 14:40:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:14,626 INFO L93 Difference]: Finished difference Result 2506 states and 4577 transitions. [2018-07-24 14:40:14,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:40:14,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2018-07-24 14:40:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:14,642 INFO L225 Difference]: With dead ends: 2506 [2018-07-24 14:40:14,642 INFO L226 Difference]: Without dead ends: 1753 [2018-07-24 14:40:14,648 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:40:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2018-07-24 14:40:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1733. [2018-07-24 14:40:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-07-24 14:40:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3007 transitions. [2018-07-24 14:40:14,746 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3007 transitions. Word has length 131 [2018-07-24 14:40:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:14,747 INFO L471 AbstractCegarLoop]: Abstraction has 1733 states and 3007 transitions. [2018-07-24 14:40:14,747 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:40:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3007 transitions. [2018-07-24 14:40:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-24 14:40:14,751 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:14,752 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:40:14,752 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:40:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1225089816, now seen corresponding path program 1 times [2018-07-24 14:40:14,752 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:14,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:14,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:14,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:14,754 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:14,981 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:40:14,981 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:40:14,981 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:40:14,982 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:40:14,982 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:40:14,982 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:40:14,983 INFO L87 Difference]: Start difference. First operand 1733 states and 3007 transitions. Second operand 6 states. [2018-07-24 14:40:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:20,867 INFO L93 Difference]: Finished difference Result 4810 states and 8533 transitions. [2018-07-24 14:40:20,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 14:40:20,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2018-07-24 14:40:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:20,889 INFO L225 Difference]: With dead ends: 4810 [2018-07-24 14:40:20,889 INFO L226 Difference]: Without dead ends: 3083 [2018-07-24 14:40:20,896 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-24 14:40:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3083 states. [2018-07-24 14:40:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3083 to 2951. [2018-07-24 14:40:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2951 states. [2018-07-24 14:40:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 4527 transitions. [2018-07-24 14:40:20,984 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 4527 transitions. Word has length 132 [2018-07-24 14:40:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:20,985 INFO L471 AbstractCegarLoop]: Abstraction has 2951 states and 4527 transitions. [2018-07-24 14:40:20,985 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:40:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 4527 transitions. [2018-07-24 14:40:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-24 14:40:20,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:20,988 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:40:20,989 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:40:20,989 INFO L82 PathProgramCache]: Analyzing trace with hash 10237216, now seen corresponding path program 1 times [2018-07-24 14:40:20,989 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:20,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:20,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:20,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:20,991 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:21,177 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:40:21,177 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:40:21,177 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:40:21,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:40:21,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:40:21,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:40:21,179 INFO L87 Difference]: Start difference. First operand 2951 states and 4527 transitions. Second operand 6 states. [2018-07-24 14:40:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:26,889 INFO L93 Difference]: Finished difference Result 8979 states and 14291 transitions. [2018-07-24 14:40:26,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:40:26,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-07-24 14:40:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:26,923 INFO L225 Difference]: With dead ends: 8979 [2018-07-24 14:40:26,923 INFO L226 Difference]: Without dead ends: 6034 [2018-07-24 14:40:26,943 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:40:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2018-07-24 14:40:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5729. [2018-07-24 14:40:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5729 states. [2018-07-24 14:40:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 8161 transitions. [2018-07-24 14:40:27,108 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 8161 transitions. Word has length 136 [2018-07-24 14:40:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:27,109 INFO L471 AbstractCegarLoop]: Abstraction has 5729 states and 8161 transitions. [2018-07-24 14:40:27,109 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:40:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 8161 transitions. [2018-07-24 14:40:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-24 14:40:27,115 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:27,115 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:40:27,116 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:40:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1284000927, now seen corresponding path program 1 times [2018-07-24 14:40:27,116 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:27,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:27,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:27,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:27,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:27,552 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:40:27,552 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 14:40:27,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:27,561 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:40:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:27,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:40:34,204 WARN L169 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 37 [2018-07-24 14:40:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:36,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:40:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:37,231 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:40:37,232 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-07-24 14:40:37,232 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:40:37,233 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:40:37,233 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:40:37,233 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-07-24 14:40:37,233 INFO L87 Difference]: Start difference. First operand 5729 states and 8161 transitions. Second operand 3 states. [2018-07-24 14:40:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:42,704 INFO L93 Difference]: Finished difference Result 13614 states and 19902 transitions. [2018-07-24 14:40:42,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:40:42,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2018-07-24 14:40:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:42,733 INFO L225 Difference]: With dead ends: 13614 [2018-07-24 14:40:42,733 INFO L226 Difference]: Without dead ends: 5384 [2018-07-24 14:40:42,765 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 310 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-07-24 14:40:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2018-07-24 14:40:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 5384. [2018-07-24 14:40:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5384 states. [2018-07-24 14:40:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5384 states to 5384 states and 6898 transitions. [2018-07-24 14:40:42,889 INFO L78 Accepts]: Start accepts. Automaton has 5384 states and 6898 transitions. Word has length 157 [2018-07-24 14:40:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:42,889 INFO L471 AbstractCegarLoop]: Abstraction has 5384 states and 6898 transitions. [2018-07-24 14:40:42,889 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:40:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5384 states and 6898 transitions. [2018-07-24 14:40:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-24 14:40:42,896 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:42,897 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:40:42,897 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:40:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash 885541483, now seen corresponding path program 1 times [2018-07-24 14:40:42,897 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:42,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:42,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:42,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:42,899 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:43,458 WARN L169 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-07-24 14:40:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:43,579 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:40:43,580 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:40:43,580 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:40:43,580 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:40:43,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:40:43,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:40:43,581 INFO L87 Difference]: Start difference. First operand 5384 states and 6898 transitions. Second operand 6 states. [2018-07-24 14:40:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:51,399 INFO L93 Difference]: Finished difference Result 10819 states and 14099 transitions. [2018-07-24 14:40:51,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:40:51,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 229 [2018-07-24 14:40:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:51,428 INFO L225 Difference]: With dead ends: 10819 [2018-07-24 14:40:51,428 INFO L226 Difference]: Without dead ends: 5750 [2018-07-24 14:40:51,450 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:40:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5750 states. [2018-07-24 14:40:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5750 to 5670. [2018-07-24 14:40:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5670 states. [2018-07-24 14:40:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 7267 transitions. [2018-07-24 14:40:51,570 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 7267 transitions. Word has length 229 [2018-07-24 14:40:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:51,571 INFO L471 AbstractCegarLoop]: Abstraction has 5670 states and 7267 transitions. [2018-07-24 14:40:51,571 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:40:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 7267 transitions. [2018-07-24 14:40:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-07-24 14:40:51,581 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:51,582 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:51,582 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:40:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1431486414, now seen corresponding path program 1 times [2018-07-24 14:40:51,582 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:51,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:51,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:51,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:51,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:51,851 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:40:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:40:52,278 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:40:52,278 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 14:40:52,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:52,290 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:40:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:52,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:40:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-07-24 14:40:52,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:40:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:40:52,922 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:40:52,923 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:40:52,923 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:40:52,923 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:40:52,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:40:52,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:40:52,924 INFO L87 Difference]: Start difference. First operand 5670 states and 7267 transitions. Second operand 5 states. [2018-07-24 14:40:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:57,432 INFO L93 Difference]: Finished difference Result 15140 states and 20044 transitions. [2018-07-24 14:40:57,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:40:57,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2018-07-24 14:40:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:57,471 INFO L225 Difference]: With dead ends: 15140 [2018-07-24 14:40:57,472 INFO L226 Difference]: Without dead ends: 9784 [2018-07-24 14:40:57,497 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:40:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9784 states. [2018-07-24 14:40:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9784 to 8889. [2018-07-24 14:40:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8889 states. [2018-07-24 14:40:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 11109 transitions. [2018-07-24 14:40:57,682 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 11109 transitions. Word has length 265 [2018-07-24 14:40:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:57,683 INFO L471 AbstractCegarLoop]: Abstraction has 8889 states and 11109 transitions. [2018-07-24 14:40:57,683 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:40:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 11109 transitions. [2018-07-24 14:40:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-07-24 14:40:57,688 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:57,689 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:40:57,689 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:40:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 967230828, now seen corresponding path program 1 times [2018-07-24 14:40:57,689 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:57,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:57,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:57,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:57,691 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:58,346 WARN L169 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-07-24 14:40:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:40:58,776 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:40:58,776 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:40:58,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:58,795 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:40:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:58,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:03,046 WARN L169 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 38 [2018-07-24 14:41:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:03,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:06,461 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:41:06,461 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-07-24 14:41:06,461 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:41:06,462 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:41:06,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:41:06,462 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-07-24 14:41:06,462 INFO L87 Difference]: Start difference. First operand 8889 states and 11109 transitions. Second operand 6 states. [2018-07-24 14:41:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:21,919 INFO L93 Difference]: Finished difference Result 20896 states and 26376 transitions. [2018-07-24 14:41:21,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:41:21,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 299 [2018-07-24 14:41:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:21,961 INFO L225 Difference]: With dead ends: 20896 [2018-07-24 14:41:21,961 INFO L226 Difference]: Without dead ends: 11699 [2018-07-24 14:41:21,982 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 593 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-07-24 14:41:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11699 states. [2018-07-24 14:41:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11699 to 11073. [2018-07-24 14:41:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11073 states. [2018-07-24 14:41:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11073 states to 11073 states and 14170 transitions. [2018-07-24 14:41:22,208 INFO L78 Accepts]: Start accepts. Automaton has 11073 states and 14170 transitions. Word has length 299 [2018-07-24 14:41:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:22,209 INFO L471 AbstractCegarLoop]: Abstraction has 11073 states and 14170 transitions. [2018-07-24 14:41:22,210 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:41:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 11073 states and 14170 transitions. [2018-07-24 14:41:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-07-24 14:41:22,217 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:22,218 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:41:22,218 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash 182703236, now seen corresponding path program 1 times [2018-07-24 14:41:22,219 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:22,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:22,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:22,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:22,220 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:22,594 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:41:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:22,936 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:22,936 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 14:41:22,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:22,944 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:23,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:23,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:23,529 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:41:23,529 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-07-24 14:41:23,529 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:41:23,530 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:41:23,530 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:41:23,530 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:41:23,530 INFO L87 Difference]: Start difference. First operand 11073 states and 14170 transitions. Second operand 3 states. [2018-07-24 14:41:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:25,512 INFO L93 Difference]: Finished difference Result 21601 states and 27920 transitions. [2018-07-24 14:41:25,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:41:25,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2018-07-24 14:41:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:25,563 INFO L225 Difference]: With dead ends: 21601 [2018-07-24 14:41:25,563 INFO L226 Difference]: Without dead ends: 10534 [2018-07-24 14:41:25,593 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 671 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:41:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10534 states. [2018-07-24 14:41:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10534 to 10531. [2018-07-24 14:41:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10531 states. [2018-07-24 14:41:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10531 states to 10531 states and 13131 transitions. [2018-07-24 14:41:25,797 INFO L78 Accepts]: Start accepts. Automaton has 10531 states and 13131 transitions. Word has length 336 [2018-07-24 14:41:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:25,799 INFO L471 AbstractCegarLoop]: Abstraction has 10531 states and 13131 transitions. [2018-07-24 14:41:25,799 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:41:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10531 states and 13131 transitions. [2018-07-24 14:41:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2018-07-24 14:41:25,838 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:25,839 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:25,839 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash -368464152, now seen corresponding path program 1 times [2018-07-24 14:41:25,840 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:25,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:25,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:25,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:25,841 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:26,939 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:26,939 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 14:41:26,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:26,955 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:27,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:27,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:27,964 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:27,965 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 14:41:27,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:27,980 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:28,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:28,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:28,887 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 14:41:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:29,525 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:41:29,525 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:41:29,526 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:41:29,527 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:41:29,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:41:29,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:41:29,528 INFO L87 Difference]: Start difference. First operand 10531 states and 13131 transitions. Second operand 9 states. [2018-07-24 14:41:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:36,265 INFO L93 Difference]: Finished difference Result 26462 states and 35629 transitions. [2018-07-24 14:41:36,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 14:41:36,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 548 [2018-07-24 14:41:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:36,339 INFO L225 Difference]: With dead ends: 26462 [2018-07-24 14:41:36,339 INFO L226 Difference]: Without dead ends: 15937 [2018-07-24 14:41:36,397 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2211 GetRequests, 2189 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:41:36,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15937 states. [2018-07-24 14:41:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15937 to 15614. [2018-07-24 14:41:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15614 states. [2018-07-24 14:41:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15614 states to 15614 states and 19291 transitions. [2018-07-24 14:41:36,779 INFO L78 Accepts]: Start accepts. Automaton has 15614 states and 19291 transitions. Word has length 548 [2018-07-24 14:41:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:36,780 INFO L471 AbstractCegarLoop]: Abstraction has 15614 states and 19291 transitions. [2018-07-24 14:41:36,780 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:41:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 15614 states and 19291 transitions. [2018-07-24 14:41:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2018-07-24 14:41:36,876 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:36,877 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:41:36,877 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash 550352463, now seen corresponding path program 1 times [2018-07-24 14:41:36,878 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:36,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:36,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:36,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:36,879 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:38,191 WARN L169 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-07-24 14:41:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 528 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:41:39,576 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:39,576 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 14:41:39,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:39,587 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:39,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:41:40,571 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:41,137 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-07-24 14:41:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 162 proven. 360 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2018-07-24 14:41:42,516 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:41:42,517 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2018-07-24 14:41:42,517 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:41:42,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:41:42,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:41:42,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:41:42,519 INFO L87 Difference]: Start difference. First operand 15614 states and 19291 transitions. Second operand 5 states. [2018-07-24 14:41:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:48,430 INFO L93 Difference]: Finished difference Result 33433 states and 42919 transitions. [2018-07-24 14:41:48,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:41:48,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 717 [2018-07-24 14:41:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:48,516 INFO L225 Difference]: With dead ends: 33433 [2018-07-24 14:41:48,516 INFO L226 Difference]: Without dead ends: 17825 [2018-07-24 14:41:48,590 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1447 GetRequests, 1429 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:41:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17825 states. [2018-07-24 14:41:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17825 to 16968. [2018-07-24 14:41:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16968 states. [2018-07-24 14:41:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16968 states to 16968 states and 20809 transitions. [2018-07-24 14:41:49,029 INFO L78 Accepts]: Start accepts. Automaton has 16968 states and 20809 transitions. Word has length 717 [2018-07-24 14:41:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:49,030 INFO L471 AbstractCegarLoop]: Abstraction has 16968 states and 20809 transitions. [2018-07-24 14:41:49,030 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:41:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 16968 states and 20809 transitions. [2018-07-24 14:41:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2018-07-24 14:41:49,102 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:49,103 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:41:49,103 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:49,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1612775214, now seen corresponding path program 1 times [2018-07-24 14:41:49,103 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:49,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:49,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:49,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:49,107 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-07-24 14:41:50,217 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:50,217 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:41:50,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:50,225 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:50,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-07-24 14:41:50,857 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-07-24 14:41:51,548 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:51,549 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:41:51,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:51,568 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:52,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-07-24 14:41:52,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-07-24 14:41:53,227 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:41:53,227 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:41:53,227 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:41:53,229 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:41:53,229 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:41:53,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:41:53,229 INFO L87 Difference]: Start difference. First operand 16968 states and 20809 transitions. Second operand 9 states. [2018-07-24 14:41:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:58,424 INFO L93 Difference]: Finished difference Result 31173 states and 38123 transitions. [2018-07-24 14:41:58,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:41:58,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 816 [2018-07-24 14:41:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:58,479 INFO L225 Difference]: With dead ends: 31173 [2018-07-24 14:41:58,479 INFO L226 Difference]: Without dead ends: 14519 [2018-07-24 14:41:58,557 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3282 GetRequests, 3262 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:41:58,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14519 states. [2018-07-24 14:41:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14519 to 13924. [2018-07-24 14:41:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13924 states. [2018-07-24 14:41:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 15652 transitions. [2018-07-24 14:41:58,817 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 15652 transitions. Word has length 816 [2018-07-24 14:41:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:58,819 INFO L471 AbstractCegarLoop]: Abstraction has 13924 states and 15652 transitions. [2018-07-24 14:41:58,819 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:41:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 15652 transitions. [2018-07-24 14:41:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2018-07-24 14:41:58,852 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:58,853 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, 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, 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:58,854 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash -834410709, now seen corresponding path program 1 times [2018-07-24 14:41:58,856 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:58,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:58,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:58,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:58,857 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 360 proven. 6 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2018-07-24 14:41:59,565 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:59,565 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:41:59,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:59,576 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:59,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:42:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 969 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2018-07-24 14:42:00,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:42:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 360 proven. 6 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2018-07-24 14:42:00,632 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:42:00,632 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-07-24 14:42:00,632 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:42:00,633 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:42:00,633 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:42:00,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:42:00,634 INFO L87 Difference]: Start difference. First operand 13924 states and 15652 transitions. Second operand 3 states. [2018-07-24 14:42:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:42:01,886 INFO L93 Difference]: Finished difference Result 27532 states and 30999 transitions. [2018-07-24 14:42:01,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:42:01,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 849 [2018-07-24 14:42:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:42:01,918 INFO L225 Difference]: With dead ends: 27532 [2018-07-24 14:42:01,919 INFO L226 Difference]: Without dead ends: 13922 [2018-07-24 14:42:01,943 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1698 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:42:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2018-07-24 14:42:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 13922. [2018-07-24 14:42:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13922 states. [2018-07-24 14:42:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13922 states to 13922 states and 15648 transitions. [2018-07-24 14:42:02,160 INFO L78 Accepts]: Start accepts. Automaton has 13922 states and 15648 transitions. Word has length 849 [2018-07-24 14:42:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:42:02,161 INFO L471 AbstractCegarLoop]: Abstraction has 13922 states and 15648 transitions. [2018-07-24 14:42:02,161 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:42:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 13922 states and 15648 transitions. [2018-07-24 14:42:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2018-07-24 14:42:02,184 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:42:02,185 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:42:02,185 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:42:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1425172494, now seen corresponding path program 1 times [2018-07-24 14:42:02,186 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:42:02,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:02,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:02,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:02,187 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:42:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:03,364 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:42:03,364 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 14:42:03,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:03,372 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:42:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:03,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:42:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:04,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:42:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:05,692 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:42:05,692 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 14:42:05,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:05,722 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:42:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:06,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:42:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:06,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:42:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:07,443 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:42:07,444 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-07-24 14:42:07,444 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:42:07,445 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:42:07,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:42:07,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:42:07,446 INFO L87 Difference]: Start difference. First operand 13922 states and 15648 transitions. Second operand 7 states. [2018-07-24 14:42:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:42:15,922 INFO L93 Difference]: Finished difference Result 32312 states and 37253 transitions. [2018-07-24 14:42:15,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 14:42:15,923 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 851 [2018-07-24 14:42:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:42:15,965 INFO L225 Difference]: With dead ends: 32312 [2018-07-24 14:42:15,965 INFO L226 Difference]: Without dead ends: 18704 [2018-07-24 14:42:15,996 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3416 GetRequests, 3400 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:42:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18704 states. [2018-07-24 14:42:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18704 to 17562. [2018-07-24 14:42:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17562 states. [2018-07-24 14:42:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17562 states to 17562 states and 19836 transitions. [2018-07-24 14:42:16,265 INFO L78 Accepts]: Start accepts. Automaton has 17562 states and 19836 transitions. Word has length 851 [2018-07-24 14:42:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:42:16,266 INFO L471 AbstractCegarLoop]: Abstraction has 17562 states and 19836 transitions. [2018-07-24 14:42:16,266 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:42:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17562 states and 19836 transitions. [2018-07-24 14:42:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2018-07-24 14:42:16,298 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:42:16,299 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:42:16,299 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:42:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash 204219720, now seen corresponding path program 1 times [2018-07-24 14:42:16,299 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:42:16,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:16,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:16,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:16,300 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:42:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:17,909 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:42:17,909 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 14:42:17,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:17,917 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:42:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:18,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:42:18,758 WARN L169 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 14:42:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:19,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:42:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:20,106 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:42:20,106 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 14:42:20,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:20,122 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:42:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:20,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:42:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:21,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:42:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:42:23,022 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:42:23,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7, 8, 9] total 21 [2018-07-24 14:42:23,022 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:42:23,023 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:42:23,024 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:42:23,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:42:23,024 INFO L87 Difference]: Start difference. First operand 17562 states and 19836 transitions. Second operand 13 states. [2018-07-24 14:42:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:42:35,225 INFO L93 Difference]: Finished difference Result 35811 states and 40511 transitions. [2018-07-24 14:42:35,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-24 14:42:35,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 889 [2018-07-24 14:42:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:42:35,264 INFO L225 Difference]: With dead ends: 35811 [2018-07-24 14:42:35,264 INFO L226 Difference]: Without dead ends: 18563 [2018-07-24 14:42:35,290 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3605 GetRequests, 3559 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=395, Invalid=1327, Unknown=0, NotChecked=0, Total=1722 [2018-07-24 14:42:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18563 states. [2018-07-24 14:42:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18563 to 17887. [2018-07-24 14:42:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17887 states. [2018-07-24 14:42:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17887 states to 17887 states and 20007 transitions. [2018-07-24 14:42:35,609 INFO L78 Accepts]: Start accepts. Automaton has 17887 states and 20007 transitions. Word has length 889 [2018-07-24 14:42:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:42:35,610 INFO L471 AbstractCegarLoop]: Abstraction has 17887 states and 20007 transitions. [2018-07-24 14:42:35,610 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:42:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 17887 states and 20007 transitions. [2018-07-24 14:42:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2018-07-24 14:42:35,639 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:42:35,640 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2018-07-24 14:42:35,640 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:42:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash 223263010, now seen corresponding path program 1 times [2018-07-24 14:42:35,641 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:42:35,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:35,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:35,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:35,642 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:42:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:36,710 WARN L169 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-07-24 14:42:37,048 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-07-24 14:42:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2018-07-24 14:42:37,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:42:37,639 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 14:42:37,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:37,647 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:42:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:37,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:42:42,265 WARN L169 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 38 [2018-07-24 14:42:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 14 proven. 154 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2018-07-24 14:42:42,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:42:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2018-07-24 14:42:50,554 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:42:50,555 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-07-24 14:42:50,555 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:42:50,556 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:42:50,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:42:50,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-07-24 14:42:50,556 INFO L87 Difference]: Start difference. First operand 17887 states and 20007 transitions. Second operand 6 states. [2018-07-24 14:42:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:42:59,749 INFO L93 Difference]: Finished difference Result 35462 states and 39698 transitions. [2018-07-24 14:42:59,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:42:59,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 902 [2018-07-24 14:42:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:42:59,783 INFO L225 Difference]: With dead ends: 35462 [2018-07-24 14:42:59,784 INFO L226 Difference]: Without dead ends: 17579 [2018-07-24 14:42:59,805 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1816 GetRequests, 1800 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-07-24 14:42:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17579 states. [2018-07-24 14:43:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17579 to 17577. [2018-07-24 14:43:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17577 states. [2018-07-24 14:43:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17577 states to 17577 states and 19687 transitions. [2018-07-24 14:43:00,064 INFO L78 Accepts]: Start accepts. Automaton has 17577 states and 19687 transitions. Word has length 902 [2018-07-24 14:43:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:00,065 INFO L471 AbstractCegarLoop]: Abstraction has 17577 states and 19687 transitions. [2018-07-24 14:43:00,065 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:43:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17577 states and 19687 transitions. [2018-07-24 14:43:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2018-07-24 14:43:00,088 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:00,088 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:43:00,088 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:43:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash 306338735, now seen corresponding path program 1 times [2018-07-24 14:43:00,089 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:00,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:00,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:00,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:00,090 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 1104 proven. 214 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2018-07-24 14:43:01,436 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:43:01,436 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:43:01,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:01,450 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:43:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:01,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:43:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 866 proven. 0 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2018-07-24 14:43:02,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:43:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2018-07-24 14:43:02,398 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:43:02,399 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 8 [2018-07-24 14:43:02,399 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:43:02,400 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:43:02,400 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:43:02,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:43:02,401 INFO L87 Difference]: Start difference. First operand 17577 states and 19687 transitions. Second operand 3 states. [2018-07-24 14:43:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:04,522 INFO L93 Difference]: Finished difference Result 46218 states and 52696 transitions. [2018-07-24 14:43:04,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:43:04,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 925 [2018-07-24 14:43:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:04,588 INFO L225 Difference]: With dead ends: 46218 [2018-07-24 14:43:04,588 INFO L226 Difference]: Without dead ends: 28955 [2018-07-24 14:43:04,630 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1857 GetRequests, 1851 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:43:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28955 states. [2018-07-24 14:43:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28955 to 27465. [2018-07-24 14:43:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27465 states. [2018-07-24 14:43:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27465 states to 27465 states and 29942 transitions. [2018-07-24 14:43:05,025 INFO L78 Accepts]: Start accepts. Automaton has 27465 states and 29942 transitions. Word has length 925 [2018-07-24 14:43:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:05,026 INFO L471 AbstractCegarLoop]: Abstraction has 27465 states and 29942 transitions. [2018-07-24 14:43:05,026 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:43:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 27465 states and 29942 transitions. [2018-07-24 14:43:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2018-07-24 14:43:05,073 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:05,074 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, 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, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:43:05,074 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:43:05,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1815038194, now seen corresponding path program 1 times [2018-07-24 14:43:05,075 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:05,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:05,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:05,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:05,076 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 759 proven. 235 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2018-07-24 14:43:06,653 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:43:06,653 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 14:43:06,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:06,661 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:43:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:06,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:43:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 923 proven. 2 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2018-07-24 14:43:07,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:43:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 923 proven. 2 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2018-07-24 14:43:09,048 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:43:09,048 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 14:43:09,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:09,063 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:43:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:09,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:43:10,134 WARN L169 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 21 [2018-07-24 14:43:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 1480 proven. 2 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2018-07-24 14:43:10,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:43:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 759 proven. 235 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2018-07-24 14:43:11,292 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:43:11,293 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 14:43:11,293 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:43:11,294 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:43:11,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:43:11,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:43:11,295 INFO L87 Difference]: Start difference. First operand 27465 states and 29942 transitions. Second operand 9 states. Received shutdown request... [2018-07-24 14:43:37,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-24 14:43:37,087 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:43:37,094 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:43:37,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:43:37 BoogieIcfgContainer [2018-07-24 14:43:37,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:43:37,095 INFO L168 Benchmark]: Toolchain (without parser) took 235182.97 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 3.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 286.5 MB. Max. memory is 7.1 GB. [2018-07-24 14:43:37,096 INFO L168 Benchmark]: CDTParser took 0.21 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 14:43:37,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1446.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:43:37,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 255.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:43:37,098 INFO L168 Benchmark]: Boogie Preprocessor took 603.79 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 887.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:43:37,099 INFO L168 Benchmark]: RCFGBuilder took 8676.70 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 331.5 MB). Peak memory consumption was 331.5 MB. Max. memory is 7.1 GB. [2018-07-24 14:43:37,099 INFO L168 Benchmark]: TraceAbstraction took 224195.03 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.8 GB in the end (delta: -1.8 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:43:37,103 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1446.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 255.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 603.79 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 887.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8676.70 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 331.5 MB). Peak memory consumption was 331.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224195.03 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.8 GB in the end (delta: -1.8 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 169]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 169). Cancelled while BasicCegarLoop was constructing difference of abstraction (27465states) and interpolant automaton (currently 35 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (52211 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 224.1s OverallTime, 18 OverallIterations, 8 TraceHistogramMax, 145.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3669 SDtfs, 28290 SDslu, 3920 SDs, 0 SdLazy, 50148 SolverSat, 8449 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 125.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25505 GetRequests, 25234 SyntacticMatches, 39 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 35.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27465occurred in iteration=17, 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: 3.8s AutomataMinimizationTime, 17 MinimizatonAttempts, 7501 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 60.0s InterpolantComputationTime, 21841 NumberOfCodeBlocks, 21841 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 34405 ConstructedInterpolants, 1161 QuantifiedInterpolants, 99256987 SizeOfPredicates, 40 NumberOfNonLiveVariables, 17018 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 54 InterpolantComputations, 14 PerfectInterpolantSequences, 46128/48101 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-43-37-115.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-43-37-115.csv Completed graceful shutdown