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/Problem11_label02_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 13:57:37,133 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 13:57:37,135 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 13:57:37,147 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 13:57:37,148 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 13:57:37,149 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 13:57:37,150 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 13:57:37,152 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 13:57:37,154 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 13:57:37,155 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 13:57:37,156 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 13:57:37,156 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 13:57:37,157 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 13:57:37,158 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 13:57:37,159 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 13:57:37,160 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 13:57:37,161 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 13:57:37,162 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 13:57:37,165 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 13:57:37,166 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 13:57:37,167 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 13:57:37,169 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 13:57:37,171 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 13:57:37,172 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 13:57:37,172 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 13:57:37,173 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 13:57:37,174 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 13:57:37,175 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 13:57:37,176 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 13:57:37,177 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 13:57:37,177 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 13:57:37,178 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 13:57:37,178 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 13:57:37,179 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 13:57:37,180 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 13:57:37,180 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 13:57:37,181 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 13:57:37,200 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 13:57:37,200 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 13:57:37,202 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 13:57:37,202 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 13:57:37,202 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 13:57:37,202 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 13:57:37,202 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 13:57:37,203 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 13:57:37,203 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 13:57:37,203 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 13:57:37,207 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 13:57:37,207 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 13:57:37,208 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 13:57:37,208 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 13:57:37,208 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 13:57:37,209 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 13:57:37,209 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 13:57:37,209 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 13:57:37,209 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 13:57:37,210 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 13:57:37,210 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 13:57:37,210 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 13:57:37,210 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 13:57:37,210 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 13:57:37,211 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 13:57:37,211 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 13:57:37,211 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 13:57:37,214 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 13:57:37,214 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 13:57:37,214 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 13:57:37,214 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 13:57:37,215 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 13:57:37,215 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 13:57:37,277 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 13:57:37,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 13:57:37,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 13:57:37,296 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 13:57:37,296 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 13:57:37,297 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label02_true-unreach-call.c [2018-07-24 13:57:37,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0becb7353/404ef52b81b045b883adfbfd116a6f99/FLAG3db7eb895 [2018-07-24 13:57:37,927 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 13:57:37,930 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label02_true-unreach-call.c [2018-07-24 13:57:37,954 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0becb7353/404ef52b81b045b883adfbfd116a6f99/FLAG3db7eb895 [2018-07-24 13:57:37,975 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0becb7353/404ef52b81b045b883adfbfd116a6f99 [2018-07-24 13:57:37,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 13:57:37,991 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 13:57:37,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 13:57:37,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 13:57:38,004 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 13:57:38,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 01:57:37" (1/1) ... [2018-07-24 13:57:38,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3486e555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38, skipping insertion in model container [2018-07-24 13:57:38,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 01:57:37" (1/1) ... [2018-07-24 13:57:38,235 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 13:57:38,650 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 13:57:38,669 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 13:57:38,864 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 13:57:38,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38 WrapperNode [2018-07-24 13:57:38,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 13:57:38,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 13:57:38,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 13:57:38,950 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 13:57:38,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 13:57:39,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 13:57:39,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 13:57:39,130 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 13:57:39,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (1/1) ... [2018-07-24 13:57:39,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 13:57:39,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 13:57:39,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 13:57:39,513 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 13:57:39,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (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 13:57:39,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 13:57:39,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 13:57:39,587 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 13:57:39,587 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 13:57:39,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 13:57:39,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 13:57:39,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 13:57:39,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 13:57:44,850 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 13:57:44,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 01:57:44 BoogieIcfgContainer [2018-07-24 13:57:44,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 13:57:44,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 13:57:44,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 13:57:44,856 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 13:57:44,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 01:57:37" (1/3) ... [2018-07-24 13:57:44,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba8aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 01:57:44, skipping insertion in model container [2018-07-24 13:57:44,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 01:57:38" (2/3) ... [2018-07-24 13:57:44,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba8aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 01:57:44, skipping insertion in model container [2018-07-24 13:57:44,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 01:57:44" (3/3) ... [2018-07-24 13:57:44,860 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label02_true-unreach-call.c [2018-07-24 13:57:44,870 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 13:57:44,879 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 13:57:44,935 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 13:57:44,936 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 13:57:44,937 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 13:57:44,937 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 13:57:44,937 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 13:57:44,937 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 13:57:44,937 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 13:57:44,937 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 13:57:44,937 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 13:57:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-07-24 13:57:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-24 13:57:44,980 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:57:44,981 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 13:57:44,981 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 13:57:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1008235991, now seen corresponding path program 1 times [2018-07-24 13:57:44,990 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:57:45,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:57:45,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:57:45,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:57:45,045 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:57:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:57:45,522 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 13:57:45,640 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 13:57:45,642 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 13:57:45,642 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 13:57:45,643 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:57:45,648 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 13:57:45,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 13:57:45,665 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 13:57:45,667 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-07-24 13:57:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:57:48,185 INFO L93 Difference]: Finished difference Result 790 states and 1382 transitions. [2018-07-24 13:57:48,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 13:57:48,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2018-07-24 13:57:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:57:48,210 INFO L225 Difference]: With dead ends: 790 [2018-07-24 13:57:48,210 INFO L226 Difference]: Without dead ends: 495 [2018-07-24 13:57:48,219 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 13:57:48,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-07-24 13:57:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 488. [2018-07-24 13:57:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-07-24 13:57:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 849 transitions. [2018-07-24 13:57:48,325 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 849 transitions. Word has length 61 [2018-07-24 13:57:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:57:48,326 INFO L471 AbstractCegarLoop]: Abstraction has 488 states and 849 transitions. [2018-07-24 13:57:48,326 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 13:57:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 849 transitions. [2018-07-24 13:57:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-24 13:57:48,340 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:57:48,340 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] [2018-07-24 13:57:48,341 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 13:57:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2088040920, now seen corresponding path program 1 times [2018-07-24 13:57:48,343 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:57:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:57:48,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:57:48,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:57:48,345 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:57:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:57:48,753 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 13:57:48,754 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 13:57:48,755 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 13:57:48,755 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:57:48,757 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 13:57:48,760 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 13:57:48,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 13:57:48,761 INFO L87 Difference]: Start difference. First operand 488 states and 849 transitions. Second operand 5 states. [2018-07-24 13:57:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:57:54,944 INFO L93 Difference]: Finished difference Result 1731 states and 3162 transitions. [2018-07-24 13:57:54,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 13:57:54,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2018-07-24 13:57:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:57:54,965 INFO L225 Difference]: With dead ends: 1731 [2018-07-24 13:57:54,965 INFO L226 Difference]: Without dead ends: 1249 [2018-07-24 13:57:54,971 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 13:57:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2018-07-24 13:57:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1032. [2018-07-24 13:57:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-07-24 13:57:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1658 transitions. [2018-07-24 13:57:55,060 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1658 transitions. Word has length 137 [2018-07-24 13:57:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:57:55,061 INFO L471 AbstractCegarLoop]: Abstraction has 1032 states and 1658 transitions. [2018-07-24 13:57:55,061 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 13:57:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1658 transitions. [2018-07-24 13:57:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-24 13:57:55,067 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:57:55,067 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] [2018-07-24 13:57:55,067 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 13:57:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1840808407, now seen corresponding path program 1 times [2018-07-24 13:57:55,068 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:57:55,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:57:55,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:57:55,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:57:55,069 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:57:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:57:55,335 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 13:57:55,336 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 13:57:55,336 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 13:57:55,336 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:57:55,337 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 13:57:55,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 13:57:55,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 13:57:55,338 INFO L87 Difference]: Start difference. First operand 1032 states and 1658 transitions. Second operand 6 states. [2018-07-24 13:58:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:58:02,072 INFO L93 Difference]: Finished difference Result 3996 states and 6917 transitions. [2018-07-24 13:58:02,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 13:58:02,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2018-07-24 13:58:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:58:02,100 INFO L225 Difference]: With dead ends: 3996 [2018-07-24 13:58:02,100 INFO L226 Difference]: Without dead ends: 2970 [2018-07-24 13:58:02,116 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-24 13:58:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2018-07-24 13:58:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2907. [2018-07-24 13:58:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2907 states. [2018-07-24 13:58:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4225 transitions. [2018-07-24 13:58:02,226 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4225 transitions. Word has length 148 [2018-07-24 13:58:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:58:02,227 INFO L471 AbstractCegarLoop]: Abstraction has 2907 states and 4225 transitions. [2018-07-24 13:58:02,227 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 13:58:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4225 transitions. [2018-07-24 13:58:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-07-24 13:58:02,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:58:02,234 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] [2018-07-24 13:58:02,234 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 13:58:02,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1808581075, now seen corresponding path program 1 times [2018-07-24 13:58:02,235 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:58:02,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:02,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:02,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:02,236 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:58:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:03,112 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 13:58:03,112 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:03,112 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 13:58:03,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:03,121 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:03,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:03,513 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 13:58:03,514 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:03,965 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 13:58:03,999 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 13:58:03,999 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 13:58:04,000 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:58:04,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 13:58:04,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 13:58:04,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-07-24 13:58:04,005 INFO L87 Difference]: Start difference. First operand 2907 states and 4225 transitions. Second operand 3 states. [2018-07-24 13:58:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:58:07,738 INFO L93 Difference]: Finished difference Result 6622 states and 10025 transitions. [2018-07-24 13:58:07,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 13:58:07,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2018-07-24 13:58:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:58:07,760 INFO L225 Difference]: With dead ends: 6622 [2018-07-24 13:58:07,760 INFO L226 Difference]: Without dead ends: 3721 [2018-07-24 13:58:07,779 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 386 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-07-24 13:58:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2018-07-24 13:58:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3523. [2018-07-24 13:58:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3523 states. [2018-07-24 13:58:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 5144 transitions. [2018-07-24 13:58:07,894 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 5144 transitions. Word has length 193 [2018-07-24 13:58:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:58:07,895 INFO L471 AbstractCegarLoop]: Abstraction has 3523 states and 5144 transitions. [2018-07-24 13:58:07,895 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 13:58:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 5144 transitions. [2018-07-24 13:58:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-07-24 13:58:07,904 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:58:07,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 13:58:07,905 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 13:58:07,905 INFO L82 PathProgramCache]: Analyzing trace with hash 409461098, now seen corresponding path program 1 times [2018-07-24 13:58:07,905 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:58:07,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:07,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:07,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:07,907 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:58:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:08,192 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 13:58:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 108 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 13:58:08,576 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:08,576 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 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 13:58:08,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:08,594 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:08,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-07-24 13:58:09,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 108 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 13:58:09,506 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 13:58:09,506 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 13:58:09,506 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:58:09,507 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 13:58:09,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 13:58:09,507 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 13:58:09,508 INFO L87 Difference]: Start difference. First operand 3523 states and 5144 transitions. Second operand 5 states. [2018-07-24 13:58:13,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:58:13,725 INFO L93 Difference]: Finished difference Result 11366 states and 17535 transitions. [2018-07-24 13:58:13,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 13:58:13,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2018-07-24 13:58:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:58:13,771 INFO L225 Difference]: With dead ends: 11366 [2018-07-24 13:58:13,772 INFO L226 Difference]: Without dead ends: 7849 [2018-07-24 13:58:13,800 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 431 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-07-24 13:58:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7849 states. [2018-07-24 13:58:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7849 to 7739. [2018-07-24 13:58:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7739 states. [2018-07-24 13:58:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7739 states to 7739 states and 11192 transitions. [2018-07-24 13:58:14,099 INFO L78 Accepts]: Start accepts. Automaton has 7739 states and 11192 transitions. Word has length 218 [2018-07-24 13:58:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:58:14,099 INFO L471 AbstractCegarLoop]: Abstraction has 7739 states and 11192 transitions. [2018-07-24 13:58:14,099 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 13:58:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7739 states and 11192 transitions. [2018-07-24 13:58:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-24 13:58:14,115 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:58:14,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 13:58:14,116 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 13:58:14,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1725035053, now seen corresponding path program 1 times [2018-07-24 13:58:14,116 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:58:14,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:14,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:14,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:14,118 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:58:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:14,665 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:14,665 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 13:58:14,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:14,673 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:14,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:14,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:15,084 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:15,085 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 13:58:15,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:15,108 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:15,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 109 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:15,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:15,710 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 13:58:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:16,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 13:58:16,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 10 [2018-07-24 13:58:16,115 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 13:58:16,116 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 13:58:16,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 13:58:16,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-07-24 13:58:16,117 INFO L87 Difference]: Start difference. First operand 7739 states and 11192 transitions. Second operand 7 states. [2018-07-24 13:58:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:58:18,199 INFO L93 Difference]: Finished difference Result 15496 states and 23457 transitions. [2018-07-24 13:58:18,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 13:58:18,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2018-07-24 13:58:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:58:18,250 INFO L225 Difference]: With dead ends: 15496 [2018-07-24 13:58:18,250 INFO L226 Difference]: Without dead ends: 7763 [2018-07-24 13:58:18,286 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 869 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-07-24 13:58:18,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7763 states. [2018-07-24 13:58:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7763 to 7575. [2018-07-24 13:58:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7575 states. [2018-07-24 13:58:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7575 states to 7575 states and 9547 transitions. [2018-07-24 13:58:18,488 INFO L78 Accepts]: Start accepts. Automaton has 7575 states and 9547 transitions. Word has length 219 [2018-07-24 13:58:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:58:18,489 INFO L471 AbstractCegarLoop]: Abstraction has 7575 states and 9547 transitions. [2018-07-24 13:58:18,489 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 13:58:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7575 states and 9547 transitions. [2018-07-24 13:58:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-24 13:58:18,504 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:58:18,505 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, 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 13:58:18,505 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 13:58:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1549035178, now seen corresponding path program 1 times [2018-07-24 13:58:18,505 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:58:18,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:18,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:18,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:18,507 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:58:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 13:58:18,878 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 13:58:18,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 13:58:18,879 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:58:18,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 13:58:18,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 13:58:18,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 13:58:18,880 INFO L87 Difference]: Start difference. First operand 7575 states and 9547 transitions. Second operand 4 states. [2018-07-24 13:58:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:58:22,318 INFO L93 Difference]: Finished difference Result 18847 states and 25190 transitions. [2018-07-24 13:58:22,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 13:58:22,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 224 [2018-07-24 13:58:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:58:22,371 INFO L225 Difference]: With dead ends: 18847 [2018-07-24 13:58:22,371 INFO L226 Difference]: Without dead ends: 11278 [2018-07-24 13:58:22,406 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 13:58:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11278 states. [2018-07-24 13:58:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11278 to 11083. [2018-07-24 13:58:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11083 states. [2018-07-24 13:58:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11083 states to 11083 states and 14256 transitions. [2018-07-24 13:58:22,678 INFO L78 Accepts]: Start accepts. Automaton has 11083 states and 14256 transitions. Word has length 224 [2018-07-24 13:58:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:58:22,678 INFO L471 AbstractCegarLoop]: Abstraction has 11083 states and 14256 transitions. [2018-07-24 13:58:22,678 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 13:58:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 11083 states and 14256 transitions. [2018-07-24 13:58:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-07-24 13:58:22,718 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:58:22,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:22,719 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 13:58:22,719 INFO L82 PathProgramCache]: Analyzing trace with hash -277028360, now seen corresponding path program 1 times [2018-07-24 13:58:22,720 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:58:22,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:22,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:22,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:22,721 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:58:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 13:58:23,280 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:23,280 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 13:58:23,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:23,290 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:23,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-07-24 13:58:23,678 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:23,887 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 13:58:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 13:58:24,269 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 13:58:24,269 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-07-24 13:58:24,269 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:58:24,270 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 13:58:24,270 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 13:58:24,270 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 13:58:24,271 INFO L87 Difference]: Start difference. First operand 11083 states and 14256 transitions. Second operand 5 states. [2018-07-24 13:58:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:58:28,444 INFO L93 Difference]: Finished difference Result 25691 states and 32801 transitions. [2018-07-24 13:58:28,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 13:58:28,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 302 [2018-07-24 13:58:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:58:28,497 INFO L225 Difference]: With dead ends: 25691 [2018-07-24 13:58:28,497 INFO L226 Difference]: Without dead ends: 14614 [2018-07-24 13:58:28,531 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 601 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 13:58:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14614 states. [2018-07-24 13:58:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14614 to 11419. [2018-07-24 13:58:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11419 states. [2018-07-24 13:58:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11419 states to 11419 states and 14761 transitions. [2018-07-24 13:58:28,807 INFO L78 Accepts]: Start accepts. Automaton has 11419 states and 14761 transitions. Word has length 302 [2018-07-24 13:58:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:58:28,808 INFO L471 AbstractCegarLoop]: Abstraction has 11419 states and 14761 transitions. [2018-07-24 13:58:28,808 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 13:58:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 11419 states and 14761 transitions. [2018-07-24 13:58:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-07-24 13:58:28,841 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:58:28,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:28,841 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 13:58:28,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1483067867, now seen corresponding path program 1 times [2018-07-24 13:58:28,842 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:58:28,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:28,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:28,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:28,843 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:58:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:29,831 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:29,831 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 13:58:29,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:29,840 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:29,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:30,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:31,323 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-07-24 13:58:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:31,787 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:31,788 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 13:58:31,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:31,805 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:32,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:32,290 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:32,821 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 13:58:32,821 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8, 5, 5] total 25 [2018-07-24 13:58:32,822 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 13:58:32,822 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 13:58:32,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 13:58:32,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-07-24 13:58:32,823 INFO L87 Difference]: Start difference. First operand 11419 states and 14761 transitions. Second operand 15 states. [2018-07-24 13:58:32,983 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-07-24 13:58:34,791 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2018-07-24 13:58:37,123 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2018-07-24 13:58:38,065 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-07-24 13:58:39,307 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2018-07-24 13:58:39,514 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2018-07-24 13:58:39,656 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2018-07-24 13:58:41,204 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2018-07-24 13:58:42,807 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2018-07-24 13:58:44,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:58:44,032 INFO L93 Difference]: Finished difference Result 27446 states and 37455 transitions. [2018-07-24 13:58:44,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 13:58:44,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 345 [2018-07-24 13:58:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:58:44,100 INFO L225 Difference]: With dead ends: 27446 [2018-07-24 13:58:44,101 INFO L226 Difference]: Without dead ends: 16033 [2018-07-24 13:58:44,158 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1427 GetRequests, 1371 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=751, Invalid=2329, Unknown=0, NotChecked=0, Total=3080 [2018-07-24 13:58:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16033 states. [2018-07-24 13:58:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16033 to 14637. [2018-07-24 13:58:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14637 states. [2018-07-24 13:58:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14637 states to 14637 states and 17831 transitions. [2018-07-24 13:58:44,471 INFO L78 Accepts]: Start accepts. Automaton has 14637 states and 17831 transitions. Word has length 345 [2018-07-24 13:58:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:58:44,471 INFO L471 AbstractCegarLoop]: Abstraction has 14637 states and 17831 transitions. [2018-07-24 13:58:44,471 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 13:58:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 14637 states and 17831 transitions. [2018-07-24 13:58:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-07-24 13:58:44,503 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:58:44,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:44,504 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 13:58:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash 621326809, now seen corresponding path program 1 times [2018-07-24 13:58:44,505 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:58:44,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:44,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:44,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:58:44,506 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:58:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 13:58:45,214 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:45,214 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 13:58:45,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:45,226 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:45,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:45,956 WARN L1032 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_2 Int)) (and (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0)| v_prenex_2) (<= 0 v_prenex_2) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0 (+ (mod v_prenex_2 15) 260)))) (exists ((v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0_602 Int)) (let ((.cse0 (mod v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0_602 15))) (and (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0 (+ .cse0 260)) (= 0 .cse0) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0)| v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0_602)))) (exists ((v_prenex_1 Int)) (let ((.cse1 (mod v_prenex_1 15))) (and (< v_prenex_1 0) (not (= 0 .cse1)) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0)| v_prenex_1) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a29~0 (+ .cse1 245)))))) is different from true [2018-07-24 13:58:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 109 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-07-24 13:58:46,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 236 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:46,487 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:58:46,487 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 13:58:46,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:58:46,503 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:58:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:58:46,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:58:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 109 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:47,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:58:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 236 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 13:58:47,414 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 13:58:47,415 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5, 8, 5] total 16 [2018-07-24 13:58:47,415 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 13:58:47,416 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 13:58:47,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 13:58:47,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=154, Unknown=1, NotChecked=26, Total=240 [2018-07-24 13:58:47,417 INFO L87 Difference]: Start difference. First operand 14637 states and 17831 transitions. Second operand 11 states. [2018-07-24 13:58:56,111 WARN L169 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 38 DAG size of output: 16 [2018-07-24 13:59:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:59:04,896 INFO L93 Difference]: Finished difference Result 38711 states and 49732 transitions. [2018-07-24 13:59:04,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-24 13:59:04,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 373 [2018-07-24 13:59:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:59:04,979 INFO L225 Difference]: With dead ends: 38711 [2018-07-24 13:59:04,979 INFO L226 Difference]: Without dead ends: 24145 [2018-07-24 13:59:05,029 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1514 GetRequests, 1479 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=192, Invalid=619, Unknown=5, NotChecked=54, Total=870 [2018-07-24 13:59:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24145 states. [2018-07-24 13:59:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24145 to 23456. [2018-07-24 13:59:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23456 states. [2018-07-24 13:59:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23456 states to 23456 states and 28818 transitions. [2018-07-24 13:59:05,488 INFO L78 Accepts]: Start accepts. Automaton has 23456 states and 28818 transitions. Word has length 373 [2018-07-24 13:59:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:59:05,488 INFO L471 AbstractCegarLoop]: Abstraction has 23456 states and 28818 transitions. [2018-07-24 13:59:05,489 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 13:59:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 23456 states and 28818 transitions. [2018-07-24 13:59:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-07-24 13:59:05,510 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:59:05,511 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, 1, 1, 1, 1, 1, 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 13:59:05,511 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 13:59:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1128807110, now seen corresponding path program 1 times [2018-07-24 13:59:05,512 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:59:05,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:05,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:05,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:05,513 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:59:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 13:59:05,959 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 13:59:05,959 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 13:59:05,959 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 13:59:05,960 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 13:59:05,960 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 13:59:05,960 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 13:59:05,960 INFO L87 Difference]: Start difference. First operand 23456 states and 28818 transitions. Second operand 4 states. [2018-07-24 13:59:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:59:08,445 INFO L93 Difference]: Finished difference Result 53787 states and 67597 transitions. [2018-07-24 13:59:08,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 13:59:08,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2018-07-24 13:59:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:59:08,554 INFO L225 Difference]: With dead ends: 53787 [2018-07-24 13:59:08,554 INFO L226 Difference]: Without dead ends: 31806 [2018-07-24 13:59:08,619 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 13:59:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31806 states. [2018-07-24 13:59:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31806 to 31756. [2018-07-24 13:59:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31756 states. [2018-07-24 13:59:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31756 states to 31756 states and 39039 transitions. [2018-07-24 13:59:09,197 INFO L78 Accepts]: Start accepts. Automaton has 31756 states and 39039 transitions. Word has length 376 [2018-07-24 13:59:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:59:09,198 INFO L471 AbstractCegarLoop]: Abstraction has 31756 states and 39039 transitions. [2018-07-24 13:59:09,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 13:59:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 31756 states and 39039 transitions. [2018-07-24 13:59:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-07-24 13:59:09,233 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:59:09,233 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 13:59:09,234 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 13:59:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1330205311, now seen corresponding path program 1 times [2018-07-24 13:59:09,234 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:59:09,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:09,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:09,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:09,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:59:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 173 proven. 198 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-07-24 13:59:09,740 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:59:09,741 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 13:59:09,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:09,748 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:59:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:09,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:59:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 175 proven. 4 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 13:59:10,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:59:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 175 proven. 200 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-07-24 13:59:10,649 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:59:10,649 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 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 13:59:10,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:10,666 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:59:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:11,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:59:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 175 proven. 4 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 13:59:11,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:59:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 175 proven. 200 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-07-24 13:59:12,454 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 13:59:12,454 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 14 [2018-07-24 13:59:12,454 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 13:59:12,456 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 13:59:12,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 13:59:12,456 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 13:59:12,457 INFO L87 Difference]: Start difference. First operand 31756 states and 39039 transitions. Second operand 9 states. [2018-07-24 13:59:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:59:17,917 INFO L93 Difference]: Finished difference Result 74996 states and 98311 transitions. [2018-07-24 13:59:17,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-24 13:59:17,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 415 [2018-07-24 13:59:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:59:18,126 INFO L225 Difference]: With dead ends: 74996 [2018-07-24 13:59:18,127 INFO L226 Difference]: Without dead ends: 47035 [2018-07-24 13:59:18,212 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1682 GetRequests, 1654 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2018-07-24 13:59:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47035 states. [2018-07-24 13:59:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47035 to 46034. [2018-07-24 13:59:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46034 states. [2018-07-24 13:59:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46034 states to 46034 states and 59776 transitions. [2018-07-24 13:59:19,573 INFO L78 Accepts]: Start accepts. Automaton has 46034 states and 59776 transitions. Word has length 415 [2018-07-24 13:59:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:59:19,574 INFO L471 AbstractCegarLoop]: Abstraction has 46034 states and 59776 transitions. [2018-07-24 13:59:19,575 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 13:59:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46034 states and 59776 transitions. [2018-07-24 13:59:19,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-07-24 13:59:19,677 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:59:19,677 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:59:19,677 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 13:59:19,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1251224200, now seen corresponding path program 1 times [2018-07-24 13:59:19,678 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:59:19,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:19,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:19,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:19,679 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:59:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 227 proven. 382 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2018-07-24 13:59:20,099 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:59:20,099 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 13:59:20,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:20,109 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:59:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:20,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:59:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 13:59:20,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:59:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 13:59:21,538 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:59:21,538 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 13:59:21,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:21,553 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:59:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:21,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:59:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 517 proven. 10 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2018-07-24 13:59:22,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:59:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 13:59:23,269 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 13:59:23,269 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 6, 5] total 13 [2018-07-24 13:59:23,270 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 13:59:23,272 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 13:59:23,272 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 13:59:23,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-07-24 13:59:23,272 INFO L87 Difference]: Start difference. First operand 46034 states and 59776 transitions. Second operand 10 states. [2018-07-24 13:59:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 13:59:33,707 INFO L93 Difference]: Finished difference Result 100939 states and 136110 transitions. [2018-07-24 13:59:33,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 13:59:33,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 507 [2018-07-24 13:59:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 13:59:33,892 INFO L225 Difference]: With dead ends: 100939 [2018-07-24 13:59:33,892 INFO L226 Difference]: Without dead ends: 55100 [2018-07-24 13:59:34,038 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 2053 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 13:59:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55100 states. [2018-07-24 13:59:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55100 to 54443. [2018-07-24 13:59:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54443 states. [2018-07-24 13:59:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54443 states to 54443 states and 69737 transitions. [2018-07-24 13:59:34,937 INFO L78 Accepts]: Start accepts. Automaton has 54443 states and 69737 transitions. Word has length 507 [2018-07-24 13:59:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 13:59:34,938 INFO L471 AbstractCegarLoop]: Abstraction has 54443 states and 69737 transitions. [2018-07-24 13:59:34,938 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 13:59:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 54443 states and 69737 transitions. [2018-07-24 13:59:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2018-07-24 13:59:35,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 13:59:35,069 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 13:59:35,070 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 13:59:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash -635554679, now seen corresponding path program 1 times [2018-07-24 13:59:35,070 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 13:59:35,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:35,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:35,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 13:59:35,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 13:59:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 394 proven. 294 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-24 13:59:36,055 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:59:36,055 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 13:59:36,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:36,073 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:59:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:36,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:59:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 13:59:36,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:59:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 13:59:37,958 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 13:59:37,958 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 13:59:37,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 13:59:37,973 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 13:59:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 13:59:38,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 13:59:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 13:59:38,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 13:59:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 13:59:39,536 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 13:59:39,536 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6, 6, 6] total 26 [2018-07-24 13:59:39,537 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 13:59:39,538 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 13:59:39,538 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 13:59:39,539 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2018-07-24 13:59:39,539 INFO L87 Difference]: Start difference. First operand 54443 states and 69737 transitions. Second operand 19 states. [2018-07-24 14:00:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:00:03,684 INFO L93 Difference]: Finished difference Result 126092 states and 181558 transitions. [2018-07-24 14:00:03,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-24 14:00:03,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 518 [2018-07-24 14:00:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:00:03,972 INFO L225 Difference]: With dead ends: 126092 [2018-07-24 14:00:03,972 INFO L226 Difference]: Without dead ends: 71201 [2018-07-24 14:00:04,138 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2216 GetRequests, 2116 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3162 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1568, Invalid=7938, Unknown=0, NotChecked=0, Total=9506 [2018-07-24 14:00:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71201 states. [2018-07-24 14:00:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71201 to 66195. [2018-07-24 14:00:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66195 states. [2018-07-24 14:00:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66195 states to 66195 states and 79524 transitions. [2018-07-24 14:00:05,739 INFO L78 Accepts]: Start accepts. Automaton has 66195 states and 79524 transitions. Word has length 518 [2018-07-24 14:00:05,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:00:05,740 INFO L471 AbstractCegarLoop]: Abstraction has 66195 states and 79524 transitions. [2018-07-24 14:00:05,740 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:00:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 66195 states and 79524 transitions. [2018-07-24 14:00:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-07-24 14:00:05,894 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:00:05,894 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 14:00:05,894 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 14:00:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2140308035, now seen corresponding path program 1 times [2018-07-24 14:00:05,895 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:00:05,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:05,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:05,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:05,896 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:00:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 431 proven. 123 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2018-07-24 14:00:06,987 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:00:06,987 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 14:00:06,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:06,995 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:00:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:07,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:00:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 693 proven. 2 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-07-24 14:00:07,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:00:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 443 proven. 104 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-07-24 14:00:08,272 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:00:08,272 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:00:08,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:08,287 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:00:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:08,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:00:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 693 proven. 2 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-07-24 14:00:08,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:00:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 443 proven. 104 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-07-24 14:00:09,300 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:00:09,300 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 19 [2018-07-24 14:00:09,300 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:00:09,301 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 14:00:09,301 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 14:00:09,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:00:09,302 INFO L87 Difference]: Start difference. First operand 66195 states and 79524 transitions. Second operand 16 states. [2018-07-24 14:00:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:00:21,467 INFO L93 Difference]: Finished difference Result 144478 states and 184737 transitions. [2018-07-24 14:00:21,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 14:00:21,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 545 [2018-07-24 14:00:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:00:21,762 INFO L225 Difference]: With dead ends: 144478 [2018-07-24 14:00:21,762 INFO L226 Difference]: Without dead ends: 75694 [2018-07-24 14:00:21,986 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2268 GetRequests, 2206 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=668, Invalid=2412, Unknown=0, NotChecked=0, Total=3080 [2018-07-24 14:00:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75694 states. [2018-07-24 14:00:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75694 to 74882. [2018-07-24 14:00:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74882 states. [2018-07-24 14:00:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74882 states to 74882 states and 95132 transitions. [2018-07-24 14:00:24,526 INFO L78 Accepts]: Start accepts. Automaton has 74882 states and 95132 transitions. Word has length 545 [2018-07-24 14:00:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:00:24,527 INFO L471 AbstractCegarLoop]: Abstraction has 74882 states and 95132 transitions. [2018-07-24 14:00:24,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 14:00:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 74882 states and 95132 transitions. [2018-07-24 14:00:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2018-07-24 14:00:24,715 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:00:24,716 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:00:24,716 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 14:00:24,716 INFO L82 PathProgramCache]: Analyzing trace with hash 186667702, now seen corresponding path program 1 times [2018-07-24 14:00:24,716 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:00:24,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:24,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:24,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:24,718 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:00:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 14:00:25,248 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:00:25,248 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:00:25,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:25,256 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:00:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:25,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:00:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 14:00:25,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:00:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 14:00:26,595 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:00:26,595 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:00:26,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:26,611 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:00:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:27,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:00:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 14:00:27,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:00:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 2 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-07-24 14:00:27,568 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:00:27,569 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-07-24 14:00:27,569 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:00:27,570 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:00:27,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:00:27,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-07-24 14:00:27,571 INFO L87 Difference]: Start difference. First operand 74882 states and 95132 transitions. Second operand 7 states. [2018-07-24 14:00:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:00:34,481 INFO L93 Difference]: Finished difference Result 154695 states and 204554 transitions. [2018-07-24 14:00:34,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:00:34,482 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 550 [2018-07-24 14:00:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:00:34,723 INFO L225 Difference]: With dead ends: 154695 [2018-07-24 14:00:34,723 INFO L226 Difference]: Without dead ends: 74617 [2018-07-24 14:00:34,946 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2219 GetRequests, 2199 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:00:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74617 states. [2018-07-24 14:00:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74617 to 73170. [2018-07-24 14:00:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73170 states. [2018-07-24 14:00:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73170 states to 73170 states and 87827 transitions. [2018-07-24 14:00:36,404 INFO L78 Accepts]: Start accepts. Automaton has 73170 states and 87827 transitions. Word has length 550 [2018-07-24 14:00:36,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:00:36,405 INFO L471 AbstractCegarLoop]: Abstraction has 73170 states and 87827 transitions. [2018-07-24 14:00:36,405 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:00:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 73170 states and 87827 transitions. [2018-07-24 14:00:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2018-07-24 14:00:36,542 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:00:36,543 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, 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, 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] [2018-07-24 14:00:36,543 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 14:00:36,543 INFO L82 PathProgramCache]: Analyzing trace with hash -442235145, now seen corresponding path program 1 times [2018-07-24 14:00:36,543 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:00:36,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:36,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:36,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:36,544 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:00:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 678 proven. 2 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-07-24 14:00:37,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:00:37,231 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:00:37,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:37,620 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:00:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:37,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:00:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 678 proven. 2 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-07-24 14:00:38,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:00:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 678 proven. 2 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-07-24 14:00:38,557 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:00:38,558 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:00:38,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:38,573 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:00:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:39,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:00:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 678 proven. 2 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-07-24 14:00:39,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:00:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 678 proven. 2 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-07-24 14:00:39,977 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:00:39,977 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-07-24 14:00:39,978 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:00:39,978 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:00:39,978 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:00:39,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:00:39,979 INFO L87 Difference]: Start difference. First operand 73170 states and 87827 transitions. Second operand 6 states. [2018-07-24 14:00:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:00:44,354 INFO L93 Difference]: Finished difference Result 134421 states and 164347 transitions. [2018-07-24 14:00:44,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 14:00:44,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 612 [2018-07-24 14:00:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:00:44,618 INFO L225 Difference]: With dead ends: 134421 [2018-07-24 14:00:44,618 INFO L226 Difference]: Without dead ends: 72182 [2018-07-24 14:00:44,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2459 GetRequests, 2446 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:00:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72182 states. [2018-07-24 14:00:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72182 to 70164. [2018-07-24 14:00:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70164 states. [2018-07-24 14:00:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70164 states to 70164 states and 83942 transitions. [2018-07-24 14:00:46,197 INFO L78 Accepts]: Start accepts. Automaton has 70164 states and 83942 transitions. Word has length 612 [2018-07-24 14:00:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:00:46,197 INFO L471 AbstractCegarLoop]: Abstraction has 70164 states and 83942 transitions. [2018-07-24 14:00:46,197 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:00:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 70164 states and 83942 transitions. [2018-07-24 14:00:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2018-07-24 14:00:46,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:00:46,366 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2018-07-24 14:00:46,366 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 14:00:46,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2029318768, now seen corresponding path program 1 times [2018-07-24 14:00:46,367 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:00:46,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:46,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:46,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:00:46,368 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:00:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:47,042 WARN L169 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-07-24 14:00:47,321 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-07-24 14:00:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1821 backedges. 367 proven. 848 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2018-07-24 14:00:47,587 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:00:47,587 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:00:47,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:00:47,595 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:00:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:00:47,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:00:53,784 WARN L169 SmtUtils]: Spent 5.83 s on a formula simplification that was a NOOP. DAG size: 40 [2018-07-24 14:00:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1821 backedges. 1061 proven. 4 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-07-24 14:00:54,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:01:01,088 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2018-07-24 14:01:01,093 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:05,452 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:09,582 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:11,778 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:13,991 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:16,124 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:20,272 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:22,501 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:26,694 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 14:01:30,786 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 Received shutdown request... [2018-07-24 14:01:31,232 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 14:01:31,433 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:01:31,433 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:01:31,439 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:01:31,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:01:31 BoogieIcfgContainer [2018-07-24 14:01:31,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:01:31,440 INFO L168 Benchmark]: Toolchain (without parser) took 233450.38 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 311.7 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-07-24 14:01:31,441 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:01:31,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 954.56 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-07-24 14:01:31,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 179.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 14:01:31,443 INFO L168 Benchmark]: Boogie Preprocessor took 381.62 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 830.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -953.1 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:01:31,444 INFO L168 Benchmark]: RCFGBuilder took 5339.76 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 199.4 MB). Peak memory consumption was 199.4 MB. Max. memory is 7.1 GB. [2018-07-24 14:01:31,444 INFO L168 Benchmark]: TraceAbstraction took 226586.53 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.4 GB). Free memory was 2.1 GB in the beginning and 1.1 GB in the end (delta: 980.9 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-07-24 14:01:31,449 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 954.56 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 179.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 381.62 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 830.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -953.1 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5339.76 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 199.4 MB). Peak memory consumption was 199.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 226586.53 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.4 GB). Free memory was 2.1 GB in the beginning and 1.1 GB in the end (delta: 980.9 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 168]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 168). Cancelled while BasicCegarLoop was analyzing trace of length 730 with TraceHistMax 7, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 226.5s OverallTime, 18 OverallIterations, 7 TraceHistogramMax, 131.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3090 SDtfs, 30458 SDslu, 4804 SDs, 0 SdLazy, 55344 SolverSat, 10142 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18257 GetRequests, 17826 SyntacticMatches, 46 SemanticMatches, 385 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5809 ImplicationChecksByTransitivity, 28.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74882occurred in iteration=15, 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: 12.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 17249 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 27.5s InterpolantComputationTime, 14624 NumberOfCodeBlocks, 14624 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 23446 ConstructedInterpolants, 3 QuantifiedInterpolants, 45225551 SizeOfPredicates, 27 NumberOfNonLiveVariables, 14164 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 59 InterpolantComputations, 9 PerfectInterpolantSequences, 28053/30353 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/Problem11_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-01-31-466.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-01-31-466.csv Completed graceful shutdown