java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label23_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:39:11,254 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:39:11,257 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:39:11,270 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:39:11,271 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:39:11,272 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:39:11,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:39:11,277 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:39:11,279 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:39:11,281 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:39:11,284 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:39:11,284 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:39:11,285 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:39:11,288 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:39:11,289 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:39:11,296 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:39:11,299 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:39:11,301 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:39:11,304 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:39:11,308 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:39:11,309 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:39:11,312 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:39:11,319 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 12:39:11,319 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 12:39:11,319 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 12:39:11,320 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 12:39:11,321 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 12:39:11,323 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 12:39:11,324 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 12:39:11,325 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 12:39:11,325 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 12:39:11,329 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 12:39:11,329 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:39:11,329 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:39:11,330 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:39:11,333 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:39:11,333 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 [2018-08-07 12:39:11,360 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:39:11,360 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:39:11,361 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:39:11,361 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:39:11,362 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:39:11,362 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:39:11,362 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:39:11,362 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:39:11,362 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:39:11,363 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:39:11,363 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:39:11,364 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:39:11,364 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:39:11,364 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:39:11,364 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:39:11,365 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:39:11,365 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:39:11,365 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:39:11,365 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:39:11,365 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:39:11,366 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:39:11,366 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:39:11,366 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:39:11,366 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:39:11,367 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:39:11,367 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:39:11,367 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:39:11,367 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:39:11,367 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:39:11,367 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:39:11,368 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:39:11,368 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:39:11,368 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:39:11,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:39:11,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:39:11,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:39:11,436 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:39:11,436 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:39:11,437 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label23_true-unreach-call_false-termination.c [2018-08-07 12:39:11,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e76b27508/53cc6852472b42f0a27b2aafc269f99b/FLAG5579ec317 [2018-08-07 12:39:12,062 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:39:12,063 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label23_true-unreach-call_false-termination.c [2018-08-07 12:39:12,081 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e76b27508/53cc6852472b42f0a27b2aafc269f99b/FLAG5579ec317 [2018-08-07 12:39:12,096 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e76b27508/53cc6852472b42f0a27b2aafc269f99b [2018-08-07 12:39:12,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:39:12,110 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:39:12,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:39:12,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:39:12,118 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:39:12,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:12,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a33b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12, skipping insertion in model container [2018-08-07 12:39:12,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:12,323 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:39:12,692 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:39:12,712 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:39:12,827 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:39:12,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12 WrapperNode [2018-08-07 12:39:12,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:39:12,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:39:12,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:39:12,895 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:39:12,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:12,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:39:13,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:39:13,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:39:13,032 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:39:13,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (1/1) ... [2018-08-07 12:39:13,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:39:13,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:39:13,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:39:13,272 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:39:13,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (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 [2018-08-07 12:39:13,357 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-08-07 12:39:13,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-08-07 12:39:13,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:39:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:39:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:39:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:39:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:39:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:39:17,110 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:39:17,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:39:17 BoogieIcfgContainer [2018-08-07 12:39:17,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:39:17,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:39:17,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:39:17,115 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:39:17,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:39:12" (1/3) ... [2018-08-07 12:39:17,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6626aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:39:17, skipping insertion in model container [2018-08-07 12:39:17,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:39:12" (2/3) ... [2018-08-07 12:39:17,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6626aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:39:17, skipping insertion in model container [2018-08-07 12:39:17,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:39:17" (3/3) ... [2018-08-07 12:39:17,119 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label23_true-unreach-call_false-termination.c [2018-08-07 12:39:17,129 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:39:17,138 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:39:17,193 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:39:17,194 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:39:17,194 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:39:17,194 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:39:17,195 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:39:17,195 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:39:17,195 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:39:17,195 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:39:17,196 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:39:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-08-07 12:39:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-08-07 12:39:17,232 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:17,233 INFO L376 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] [2018-08-07 12:39:17,235 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash -845601649, now seen corresponding path program 1 times [2018-08-07 12:39:17,243 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:17,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:17,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:17,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:17,296 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:17,648 WARN L170 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:39:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:39:17,677 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:39:17,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:39:17,678 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:39:17,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:39:17,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:39:17,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:39:17,703 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-08-07 12:39:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:19,566 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-08-07 12:39:19,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:39:19,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2018-08-07 12:39:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:19,590 INFO L225 Difference]: With dead ends: 691 [2018-08-07 12:39:19,590 INFO L226 Difference]: Without dead ends: 434 [2018-08-07 12:39:19,598 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:39:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-08-07 12:39:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-08-07 12:39:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-08-07 12:39:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 773 transitions. [2018-08-07 12:39:19,685 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 773 transitions. Word has length 39 [2018-08-07 12:39:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:19,686 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 773 transitions. [2018-08-07 12:39:19,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:39:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 773 transitions. [2018-08-07 12:39:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-08-07 12:39:19,693 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:19,693 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:39:19,694 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1315087714, now seen corresponding path program 1 times [2018-08-07 12:39:19,694 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:19,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:19,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:19,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:19,696 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:39:20,064 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:39:20,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:39:20,064 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:39:20,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:39:20,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:39:20,067 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:39:20,067 INFO L87 Difference]: Start difference. First operand 434 states and 773 transitions. Second operand 6 states. [2018-08-07 12:39:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:25,790 INFO L93 Difference]: Finished difference Result 1611 states and 2994 transitions. [2018-08-07 12:39:25,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:39:25,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2018-08-07 12:39:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:25,806 INFO L225 Difference]: With dead ends: 1611 [2018-08-07 12:39:25,806 INFO L226 Difference]: Without dead ends: 1183 [2018-08-07 12:39:25,812 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-08-07 12:39:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2018-08-07 12:39:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1141. [2018-08-07 12:39:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1141 states. [2018-08-07 12:39:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1837 transitions. [2018-08-07 12:39:25,896 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1837 transitions. Word has length 121 [2018-08-07 12:39:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:25,896 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 1837 transitions. [2018-08-07 12:39:25,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:39:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1837 transitions. [2018-08-07 12:39:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-08-07 12:39:25,900 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:25,901 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:39:25,901 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash -964601082, now seen corresponding path program 1 times [2018-08-07 12:39:25,902 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:25,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:25,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:25,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:25,903 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:39:26,234 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:39:26,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:39:26,235 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:39:26,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:39:26,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:39:26,236 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:39:26,236 INFO L87 Difference]: Start difference. First operand 1141 states and 1837 transitions. Second operand 6 states. [2018-08-07 12:39:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:30,404 INFO L93 Difference]: Finished difference Result 2741 states and 4359 transitions. [2018-08-07 12:39:30,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-08-07 12:39:30,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-08-07 12:39:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:30,422 INFO L225 Difference]: With dead ends: 2741 [2018-08-07 12:39:30,423 INFO L226 Difference]: Without dead ends: 1606 [2018-08-07 12:39:30,428 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:39:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2018-08-07 12:39:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1532. [2018-08-07 12:39:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1532 states. [2018-08-07 12:39:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2338 transitions. [2018-08-07 12:39:30,517 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2338 transitions. Word has length 123 [2018-08-07 12:39:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:30,517 INFO L480 AbstractCegarLoop]: Abstraction has 1532 states and 2338 transitions. [2018-08-07 12:39:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:39:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2338 transitions. [2018-08-07 12:39:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-08-07 12:39:30,525 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:30,526 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:39:30,527 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash 906649879, now seen corresponding path program 1 times [2018-08-07 12:39:30,527 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:30,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:30,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:30,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:30,531 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:39:30,786 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:39:30,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:39:30,787 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:39:30,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:39:30,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:39:30,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:39:30,788 INFO L87 Difference]: Start difference. First operand 1532 states and 2338 transitions. Second operand 4 states. [2018-08-07 12:39:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:32,515 INFO L93 Difference]: Finished difference Result 3727 states and 6014 transitions. [2018-08-07 12:39:32,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:39:32,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2018-08-07 12:39:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:32,533 INFO L225 Difference]: With dead ends: 3727 [2018-08-07 12:39:32,534 INFO L226 Difference]: Without dead ends: 2201 [2018-08-07 12:39:32,543 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:39:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2018-08-07 12:39:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2197. [2018-08-07 12:39:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2197 states. [2018-08-07 12:39:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 3522 transitions. [2018-08-07 12:39:32,609 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 3522 transitions. Word has length 150 [2018-08-07 12:39:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:32,610 INFO L480 AbstractCegarLoop]: Abstraction has 2197 states and 3522 transitions. [2018-08-07 12:39:32,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:39:32,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 3522 transitions. [2018-08-07 12:39:32,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-08-07 12:39:32,617 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:32,617 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:39:32,618 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash -491137199, now seen corresponding path program 1 times [2018-08-07 12:39:32,618 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:32,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:32,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:32,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:32,620 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:33,476 WARN L170 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-08-07 12:39:33,703 WARN L170 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-08-07 12:39:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 113 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:39:34,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:34,203 INFO L194 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 [2018-08-07 12:39:34,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:34,214 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:34,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:34,810 WARN L170 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-08-07 12:39:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-08-07 12:39:34,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:39:35,429 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:39:35,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 13 [2018-08-07 12:39:35,429 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:39:35,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:39:35,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:39:35,431 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:39:35,431 INFO L87 Difference]: Start difference. First operand 2197 states and 3522 transitions. Second operand 5 states. [2018-08-07 12:39:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:39,820 INFO L93 Difference]: Finished difference Result 7641 states and 12352 transitions. [2018-08-07 12:39:39,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:39:39,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2018-08-07 12:39:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:39,852 INFO L225 Difference]: With dead ends: 7641 [2018-08-07 12:39:39,852 INFO L226 Difference]: Without dead ends: 5450 [2018-08-07 12:39:39,867 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 462 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:39:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2018-08-07 12:39:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 5407. [2018-08-07 12:39:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5407 states. [2018-08-07 12:39:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 8218 transitions. [2018-08-07 12:39:40,002 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 8218 transitions. Word has length 233 [2018-08-07 12:39:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:40,002 INFO L480 AbstractCegarLoop]: Abstraction has 5407 states and 8218 transitions. [2018-08-07 12:39:40,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:39:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 8218 transitions. [2018-08-07 12:39:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-08-07 12:39:40,012 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:40,012 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:39:40,013 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:40,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1072673537, now seen corresponding path program 1 times [2018-08-07 12:39:40,013 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:40,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:40,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:40,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:40,014 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:40,521 WARN L170 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-08-07 12:39:40,962 WARN L170 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:39:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:39:41,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:41,447 INFO L194 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 [2018-08-07 12:39:41,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:41,455 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:41,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:41,743 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-08-07 12:39:42,096 WARN L170 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-08-07 12:39:42,384 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:39:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-08-07 12:39:42,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:42,674 WARN L170 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-08-07 12:39:43,177 WARN L170 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-08-07 12:39:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:39:43,622 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:39:43,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-08-07 12:39:43,623 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:39:43,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:39:43,624 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:39:43,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:39:43,624 INFO L87 Difference]: Start difference. First operand 5407 states and 8218 transitions. Second operand 6 states. [2018-08-07 12:39:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:46,465 INFO L93 Difference]: Finished difference Result 11662 states and 17584 transitions. [2018-08-07 12:39:46,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 12:39:46,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 257 [2018-08-07 12:39:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:46,499 INFO L225 Difference]: With dead ends: 11662 [2018-08-07 12:39:46,499 INFO L226 Difference]: Without dead ends: 6261 [2018-08-07 12:39:46,521 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 508 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:39:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2018-08-07 12:39:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 6209. [2018-08-07 12:39:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6209 states. [2018-08-07 12:39:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6209 states to 6209 states and 9259 transitions. [2018-08-07 12:39:46,671 INFO L78 Accepts]: Start accepts. Automaton has 6209 states and 9259 transitions. Word has length 257 [2018-08-07 12:39:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:46,671 INFO L480 AbstractCegarLoop]: Abstraction has 6209 states and 9259 transitions. [2018-08-07 12:39:46,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:39:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6209 states and 9259 transitions. [2018-08-07 12:39:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-08-07 12:39:46,688 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:46,688 INFO L376 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:39:46,688 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash -93101835, now seen corresponding path program 1 times [2018-08-07 12:39:46,689 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:46,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:46,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:46,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:46,691 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:47,205 WARN L170 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:39:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 184 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:39:47,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:47,922 INFO L194 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 [2018-08-07 12:39:47,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:47,930 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:48,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 263 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-08-07 12:39:48,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 106 proven. 238 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:39:49,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:49,169 INFO L194 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 [2018-08-07 12:39:49,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:49,186 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:49,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 263 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-08-07 12:39:50,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 106 proven. 238 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:39:50,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:39:50,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 8, 8] total 34 [2018-08-07 12:39:50,818 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:39:50,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-08-07 12:39:50,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-08-07 12:39:50,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2018-08-07 12:39:50,821 INFO L87 Difference]: Start difference. First operand 6209 states and 9259 transitions. Second operand 19 states. [2018-08-07 12:39:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:59,880 INFO L93 Difference]: Finished difference Result 12255 states and 18864 transitions. [2018-08-07 12:39:59,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-08-07 12:39:59,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 342 [2018-08-07 12:39:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:59,908 INFO L225 Difference]: With dead ends: 12255 [2018-08-07 12:39:59,908 INFO L226 Difference]: Without dead ends: 5839 [2018-08-07 12:39:59,941 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1368 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=789, Invalid=2871, Unknown=0, NotChecked=0, Total=3660 [2018-08-07 12:39:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2018-08-07 12:40:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 5434. [2018-08-07 12:40:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5434 states. [2018-08-07 12:40:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 7328 transitions. [2018-08-07 12:40:00,085 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 7328 transitions. Word has length 342 [2018-08-07 12:40:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:00,085 INFO L480 AbstractCegarLoop]: Abstraction has 5434 states and 7328 transitions. [2018-08-07 12:40:00,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-08-07 12:40:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 7328 transitions. [2018-08-07 12:40:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-08-07 12:40:00,098 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:00,099 INFO L376 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:00,099 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:00,100 INFO L82 PathProgramCache]: Analyzing trace with hash -964341287, now seen corresponding path program 1 times [2018-08-07 12:40:00,100 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:00,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:00,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:00,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:00,101 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:00,933 WARN L170 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:40:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 12:40:01,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:01,226 INFO L194 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 [2018-08-07 12:40:01,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:01,234 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:01,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 12:40:01,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:01,760 WARN L170 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2018-08-07 12:40:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 12:40:02,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:02,131 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:02,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:02,148 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:02,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 259 proven. 8 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 12:40:02,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:02,826 WARN L170 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-08-07 12:40:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-08-07 12:40:03,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:03,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-08-07 12:40:03,285 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:03,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:40:03,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:40:03,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:40:03,287 INFO L87 Difference]: Start difference. First operand 5434 states and 7328 transitions. Second operand 7 states. [2018-08-07 12:40:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:06,158 INFO L93 Difference]: Finished difference Result 12405 states and 16836 transitions. [2018-08-07 12:40:06,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 12:40:06,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 344 [2018-08-07 12:40:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:06,194 INFO L225 Difference]: With dead ends: 12405 [2018-08-07 12:40:06,194 INFO L226 Difference]: Without dead ends: 7160 [2018-08-07 12:40:06,215 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1396 GetRequests, 1366 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-08-07 12:40:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7160 states. [2018-08-07 12:40:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7160 to 6997. [2018-08-07 12:40:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6997 states. [2018-08-07 12:40:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6997 states to 6997 states and 8704 transitions. [2018-08-07 12:40:06,346 INFO L78 Accepts]: Start accepts. Automaton has 6997 states and 8704 transitions. Word has length 344 [2018-08-07 12:40:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:06,347 INFO L480 AbstractCegarLoop]: Abstraction has 6997 states and 8704 transitions. [2018-08-07 12:40:06,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:40:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6997 states and 8704 transitions. [2018-08-07 12:40:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-08-07 12:40:06,365 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:06,365 INFO L376 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:06,365 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1897272713, now seen corresponding path program 1 times [2018-08-07 12:40:06,366 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:06,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:06,367 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:06,862 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:40:07,044 WARN L170 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:40:07,488 WARN L170 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-08-07 12:40:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 210 proven. 160 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:40:08,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:08,005 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:08,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:08,013 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:08,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-08-07 12:40:09,138 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 102 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:40:09,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:09,828 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:09,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:09,843 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:10,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 317 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-08-07 12:40:10,811 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:11,139 WARN L170 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-08-07 12:40:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 104 proven. 266 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:40:12,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:12,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 10, 11] total 40 [2018-08-07 12:40:12,329 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:12,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-08-07 12:40:12,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-08-07 12:40:12,332 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-08-07 12:40:12,332 INFO L87 Difference]: Start difference. First operand 6997 states and 8704 transitions. Second operand 19 states. [2018-08-07 12:40:16,250 WARN L170 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-08-07 12:40:17,164 WARN L170 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-08-07 12:40:17,919 WARN L170 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2018-08-07 12:40:19,814 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-08-07 12:40:22,114 WARN L170 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2018-08-07 12:40:22,657 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2018-08-07 12:40:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:27,782 INFO L93 Difference]: Finished difference Result 15933 states and 20572 transitions. [2018-08-07 12:40:27,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-08-07 12:40:27,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 368 [2018-08-07 12:40:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:27,811 INFO L225 Difference]: With dead ends: 15933 [2018-08-07 12:40:27,811 INFO L226 Difference]: Without dead ends: 9125 [2018-08-07 12:40:27,831 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1481 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1074, Invalid=5088, Unknown=0, NotChecked=0, Total=6162 [2018-08-07 12:40:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2018-08-07 12:40:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 8741. [2018-08-07 12:40:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8741 states. [2018-08-07 12:40:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 10557 transitions. [2018-08-07 12:40:27,990 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 10557 transitions. Word has length 368 [2018-08-07 12:40:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:27,991 INFO L480 AbstractCegarLoop]: Abstraction has 8741 states and 10557 transitions. [2018-08-07 12:40:27,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-08-07 12:40:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 10557 transitions. [2018-08-07 12:40:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-08-07 12:40:28,009 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:28,010 INFO L376 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 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] [2018-08-07 12:40:28,010 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1119977589, now seen corresponding path program 1 times [2018-08-07 12:40:28,010 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:28,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:28,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:28,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:28,011 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:28,342 WARN L170 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-08-07 12:40:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 276 proven. 205 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-08-07 12:40:28,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:28,754 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:28,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:28,761 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:28,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 477 proven. 2 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-08-07 12:40:29,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 281 proven. 70 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-08-07 12:40:29,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:29,418 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:29,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:29,434 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:29,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 336 proven. 4 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-08-07 12:40:29,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 144 proven. 224 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2018-08-07 12:40:30,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:30,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-08-07 12:40:30,162 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:30,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:40:30,163 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:40:30,163 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:40:30,164 INFO L87 Difference]: Start difference. First operand 8741 states and 10557 transitions. Second operand 9 states. [2018-08-07 12:40:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:31,945 INFO L93 Difference]: Finished difference Result 17507 states and 22129 transitions. [2018-08-07 12:40:31,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 12:40:31,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 415 [2018-08-07 12:40:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:31,976 INFO L225 Difference]: With dead ends: 17507 [2018-08-07 12:40:31,976 INFO L226 Difference]: Without dead ends: 8955 [2018-08-07 12:40:31,993 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1676 GetRequests, 1648 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2018-08-07 12:40:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2018-08-07 12:40:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 8660. [2018-08-07 12:40:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8660 states. [2018-08-07 12:40:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 10120 transitions. [2018-08-07 12:40:32,150 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 10120 transitions. Word has length 415 [2018-08-07 12:40:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:32,151 INFO L480 AbstractCegarLoop]: Abstraction has 8660 states and 10120 transitions. [2018-08-07 12:40:32,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:40:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 10120 transitions. [2018-08-07 12:40:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-08-07 12:40:32,167 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:32,168 INFO L376 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:32,168 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1008370439, now seen corresponding path program 1 times [2018-08-07 12:40:32,169 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:32,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:32,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:32,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:32,170 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 417 proven. 160 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-08-07 12:40:33,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:33,099 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:33,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:33,108 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:33,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-08-07 12:40:33,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-08-07 12:40:34,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:34,170 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:34,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:34,188 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:34,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 230 proven. 156 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-08-07 12:40:34,838 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 149 proven. 237 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-08-07 12:40:35,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:35,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-08-07 12:40:35,661 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:35,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-08-07 12:40:35,662 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-08-07 12:40:35,663 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:40:35,663 INFO L87 Difference]: Start difference. First operand 8660 states and 10120 transitions. Second operand 13 states. [2018-08-07 12:40:36,330 WARN L170 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-08-07 12:40:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:40,074 INFO L93 Difference]: Finished difference Result 16694 states and 20151 transitions. [2018-08-07 12:40:40,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:40:40,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 429 [2018-08-07 12:40:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:40,104 INFO L225 Difference]: With dead ends: 16694 [2018-08-07 12:40:40,104 INFO L226 Difference]: Without dead ends: 7833 [2018-08-07 12:40:40,128 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1705 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-08-07 12:40:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2018-08-07 12:40:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 7410. [2018-08-07 12:40:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7410 states. [2018-08-07 12:40:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 8553 transitions. [2018-08-07 12:40:40,265 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 8553 transitions. Word has length 429 [2018-08-07 12:40:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:40,266 INFO L480 AbstractCegarLoop]: Abstraction has 7410 states and 8553 transitions. [2018-08-07 12:40:40,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-08-07 12:40:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 8553 transitions. [2018-08-07 12:40:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-08-07 12:40:40,283 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:40,283 INFO L376 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:40,283 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:40,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1704366171, now seen corresponding path program 2 times [2018-08-07 12:40:40,284 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:40,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:40,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:40,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:40,285 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:40,662 WARN L170 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-08-07 12:40:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 404 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:40:41,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:41,482 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:41,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-08-07 12:40:41,491 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-08-07 12:40:41,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-08-07 12:40:41,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-08-07 12:40:41,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-08-07 12:40:41,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:42,069 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-08-07 12:40:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 384 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-08-07 12:40:42,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:42,560 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:42,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-08-07 12:40:42,576 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-08-07 12:40:42,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-08-07 12:40:42,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-08-07 12:40:42,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 131 proven. 6 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-08-07 12:40:43,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:43,905 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-08-07 12:40:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-08-07 12:40:45,503 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-08-07 12:40:45,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 5, 5, 5] total 28 [2018-08-07 12:40:45,503 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:40:45,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:40:45,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:40:45,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2018-08-07 12:40:45,504 INFO L87 Difference]: Start difference. First operand 7410 states and 8553 transitions. Second operand 5 states. [2018-08-07 12:40:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:46,740 INFO L93 Difference]: Finished difference Result 14617 states and 16925 transitions. [2018-08-07 12:40:46,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 12:40:46,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 455 [2018-08-07 12:40:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:46,760 INFO L225 Difference]: With dead ends: 14617 [2018-08-07 12:40:46,760 INFO L226 Difference]: Without dead ends: 7396 [2018-08-07 12:40:46,775 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1837 GetRequests, 1809 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2018-08-07 12:40:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2018-08-07 12:40:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 7394. [2018-08-07 12:40:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7394 states. [2018-08-07 12:40:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 8431 transitions. [2018-08-07 12:40:46,893 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 8431 transitions. Word has length 455 [2018-08-07 12:40:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:46,894 INFO L480 AbstractCegarLoop]: Abstraction has 7394 states and 8431 transitions. [2018-08-07 12:40:46,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:40:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 8431 transitions. [2018-08-07 12:40:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2018-08-07 12:40:46,929 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:46,930 INFO L376 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, 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, 4, 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] [2018-08-07 12:40:46,930 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:46,931 INFO L82 PathProgramCache]: Analyzing trace with hash 953936146, now seen corresponding path program 1 times [2018-08-07 12:40:46,931 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:46,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:46,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-08-07 12:40:46,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:46,932 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 558 proven. 199 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2018-08-07 12:40:47,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:47,629 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:47,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:47,638 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:47,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 1249 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-08-07 12:40:48,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 558 proven. 199 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2018-08-07 12:40:49,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:49,158 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:49,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:49,174 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:49,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 1249 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-08-07 12:40:49,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 558 proven. 199 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2018-08-07 12:40:50,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:50,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-08-07 12:40:50,284 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:50,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:40:50,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:40:50,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:40:50,288 INFO L87 Difference]: Start difference. First operand 7394 states and 8431 transitions. Second operand 7 states. [2018-08-07 12:40:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:53,095 INFO L93 Difference]: Finished difference Result 19133 states and 24877 transitions. [2018-08-07 12:40:53,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-08-07 12:40:53,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 754 [2018-08-07 12:40:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:53,159 INFO L225 Difference]: With dead ends: 19133 [2018-08-07 12:40:53,159 INFO L226 Difference]: Without dead ends: 11928 [2018-08-07 12:40:53,236 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3032 GetRequests, 3017 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-08-07 12:40:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2018-08-07 12:40:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 11682. [2018-08-07 12:40:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11682 states. [2018-08-07 12:40:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11682 states to 11682 states and 13593 transitions. [2018-08-07 12:40:53,669 INFO L78 Accepts]: Start accepts. Automaton has 11682 states and 13593 transitions. Word has length 754 [2018-08-07 12:40:53,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:53,670 INFO L480 AbstractCegarLoop]: Abstraction has 11682 states and 13593 transitions. [2018-08-07 12:40:53,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:40:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11682 states and 13593 transitions. [2018-08-07 12:40:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2018-08-07 12:40:53,718 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:53,719 INFO L376 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:53,719 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1451051865, now seen corresponding path program 1 times [2018-08-07 12:40:53,720 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:53,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:53,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:53,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:53,721 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 565 proven. 199 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2018-08-07 12:40:54,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:54,492 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:54,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:54,502 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:54,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 1263 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-08-07 12:40:55,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 565 proven. 199 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2018-08-07 12:40:55,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:55,469 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:55,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:55,487 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:56,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 1263 proven. 2 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-08-07 12:40:56,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 565 proven. 199 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2018-08-07 12:40:56,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:56,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-08-07 12:40:56,597 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:56,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:40:56,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:40:56,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:40:56,599 INFO L87 Difference]: Start difference. First operand 11682 states and 13593 transitions. Second operand 7 states. [2018-08-07 12:40:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:59,258 INFO L93 Difference]: Finished difference Result 28003 states and 37264 transitions. [2018-08-07 12:40:59,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-08-07 12:40:59,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 761 [2018-08-07 12:40:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:59,368 INFO L225 Difference]: With dead ends: 28003 [2018-08-07 12:40:59,368 INFO L226 Difference]: Without dead ends: 16510 [2018-08-07 12:40:59,477 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3060 GetRequests, 3045 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-08-07 12:40:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16510 states. [2018-08-07 12:40:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16510 to 16137. [2018-08-07 12:40:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16137 states. [2018-08-07 12:40:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 18950 transitions. [2018-08-07 12:40:59,945 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 18950 transitions. Word has length 761 [2018-08-07 12:40:59,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:59,946 INFO L480 AbstractCegarLoop]: Abstraction has 16137 states and 18950 transitions. [2018-08-07 12:40:59,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:40:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 18950 transitions. [2018-08-07 12:40:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2018-08-07 12:40:59,996 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:59,996 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:59,997 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1924456969, now seen corresponding path program 1 times [2018-08-07 12:40:59,997 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:59,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:59,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:59,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:59,998 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:00,732 WARN L170 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:41:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 611 proven. 1121 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2018-08-07 12:41:02,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:02,629 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:41:02,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:02,637 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:02,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 1621 proven. 2 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2018-08-07 12:41:03,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 737 proven. 199 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-08-07 12:41:04,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:04,305 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:41:04,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:04,322 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:04,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 1642 proven. 74 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2018-08-07 12:41:06,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:06,513 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-08-07 12:41:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 284 proven. 1516 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2018-08-07 12:41:09,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:09,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6, 10, 11] total 33 [2018-08-07 12:41:09,068 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:09,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-08-07 12:41:09,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-08-07 12:41:09,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2018-08-07 12:41:09,071 INFO L87 Difference]: Start difference. First operand 16137 states and 18950 transitions. Second operand 19 states. [2018-08-07 12:41:13,175 WARN L170 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2018-08-07 12:41:14,815 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2018-08-07 12:41:16,057 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2018-08-07 12:41:16,258 WARN L170 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2018-08-07 12:41:16,748 WARN L170 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2018-08-07 12:41:17,652 WARN L170 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2018-08-07 12:41:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:21,379 INFO L93 Difference]: Finished difference Result 34352 states and 41156 transitions. [2018-08-07 12:41:21,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-08-07 12:41:21,379 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 888 [2018-08-07 12:41:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:21,433 INFO L225 Difference]: With dead ends: 34352 [2018-08-07 12:41:21,433 INFO L226 Difference]: Without dead ends: 18404 [2018-08-07 12:41:21,513 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3645 GetRequests, 3555 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1088, Invalid=5232, Unknown=0, NotChecked=0, Total=6320 [2018-08-07 12:41:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18404 states. [2018-08-07 12:41:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18404 to 16171. [2018-08-07 12:41:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16171 states. [2018-08-07 12:41:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 17925 transitions. [2018-08-07 12:41:21,846 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 17925 transitions. Word has length 888 [2018-08-07 12:41:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:21,847 INFO L480 AbstractCegarLoop]: Abstraction has 16171 states and 17925 transitions. [2018-08-07 12:41:21,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-08-07 12:41:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 17925 transitions. [2018-08-07 12:41:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2018-08-07 12:41:21,878 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:21,879 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:21,879 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2146735958, now seen corresponding path program 1 times [2018-08-07 12:41:21,880 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:21,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:21,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:21,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:21,881 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 758 proven. 538 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2018-08-07 12:41:23,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:23,661 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:41:23,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:23,668 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:23,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 1661 proven. 2 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2018-08-07 12:41:24,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 770 proven. 199 refuted. 0 times theorem prover too weak. 1505 trivial. 0 not checked. [2018-08-07 12:41:24,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:24,927 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:41:24,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:24,943 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:25,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 1661 proven. 2 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2018-08-07 12:41:25,929 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 770 proven. 199 refuted. 0 times theorem prover too weak. 1505 trivial. 0 not checked. [2018-08-07 12:41:26,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:26,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 19 [2018-08-07 12:41:26,400 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:26,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-08-07 12:41:26,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-08-07 12:41:26,401 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2018-08-07 12:41:26,402 INFO L87 Difference]: Start difference. First operand 16171 states and 17925 transitions. Second operand 17 states. [2018-08-07 12:41:32,228 WARN L170 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-08-07 12:41:36,632 WARN L170 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2018-08-07 12:41:38,114 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-08-07 12:41:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:41,599 INFO L93 Difference]: Finished difference Result 34691 states and 41333 transitions. [2018-08-07 12:41:41,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-08-07 12:41:41,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 921 [2018-08-07 12:41:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:41,709 INFO L225 Difference]: With dead ends: 34691 [2018-08-07 12:41:41,709 INFO L226 Difference]: Without dead ends: 18709 [2018-08-07 12:41:41,780 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3812 GetRequests, 3725 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1295, Invalid=6187, Unknown=0, NotChecked=0, Total=7482 [2018-08-07 12:41:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18709 states. [2018-08-07 12:41:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18709 to 17117. [2018-08-07 12:41:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17117 states. [2018-08-07 12:41:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17117 states to 17117 states and 18806 transitions. [2018-08-07 12:41:42,203 INFO L78 Accepts]: Start accepts. Automaton has 17117 states and 18806 transitions. Word has length 921 [2018-08-07 12:41:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:42,204 INFO L480 AbstractCegarLoop]: Abstraction has 17117 states and 18806 transitions. [2018-08-07 12:41:42,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-08-07 12:41:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17117 states and 18806 transitions. [2018-08-07 12:41:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2018-08-07 12:41:42,239 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:42,239 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:42,239 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:42,240 INFO L82 PathProgramCache]: Analyzing trace with hash -444582381, now seen corresponding path program 1 times [2018-08-07 12:41:42,240 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:42,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:42,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:42,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:42,241 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 631 proven. 224 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2018-08-07 12:41:43,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:43,514 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:41:43,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:43,522 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:43,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 2005 proven. 2 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-08-07 12:41:44,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 631 proven. 224 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2018-08-07 12:41:45,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:45,064 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:41:45,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:45,081 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:45,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 2005 proven. 2 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-08-07 12:41:46,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 631 proven. 224 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (25)] Exception during sending of exit command (exit): Broken pipe [2018-08-07 12:41:46,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:41:46,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 11 [2018-08-07 12:41:46,733 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:41:46,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 12:41:46,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 12:41:46,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:41:46,735 INFO L87 Difference]: Start difference. First operand 17117 states and 18806 transitions. Second operand 10 states. [2018-08-07 12:41:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:41:50,635 INFO L93 Difference]: Finished difference Result 35949 states and 40025 transitions. [2018-08-07 12:41:50,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-08-07 12:41:50,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1007 [2018-08-07 12:41:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:41:50,675 INFO L225 Difference]: With dead ends: 35949 [2018-08-07 12:41:50,675 INFO L226 Difference]: Without dead ends: 19021 [2018-08-07 12:41:50,713 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4060 GetRequests, 4029 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-08-07 12:41:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2018-08-07 12:41:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 18868. [2018-08-07 12:41:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18868 states. [2018-08-07 12:41:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18868 states to 18868 states and 20505 transitions. [2018-08-07 12:41:51,061 INFO L78 Accepts]: Start accepts. Automaton has 18868 states and 20505 transitions. Word has length 1007 [2018-08-07 12:41:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:41:51,062 INFO L480 AbstractCegarLoop]: Abstraction has 18868 states and 20505 transitions. [2018-08-07 12:41:51,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 12:41:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 18868 states and 20505 transitions. [2018-08-07 12:41:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2018-08-07 12:41:51,092 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:41:51,093 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:41:51,093 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:41:51,094 INFO L82 PathProgramCache]: Analyzing trace with hash 619673756, now seen corresponding path program 1 times [2018-08-07 12:41:51,094 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:41:51,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:51,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:51,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:41:51,095 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:41:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 1112 proven. 1692 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-08-07 12:41:54,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:54,516 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:41:54,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:54,524 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:54,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 970 proven. 2 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2018-08-07 12:41:55,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:41:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 970 proven. 2 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2018-08-07 12:41:56,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:41:56,668 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:41:56,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:41:56,683 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:41:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:41:57,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:41:58,759 WARN L170 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-08-07 12:41:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 2236 proven. 6 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2018-08-07 12:41:59,594 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 1641 proven. 287 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-08-07 12:42:03,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:42:03,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5, 5, 7, 8] total 39 [2018-08-07 12:42:03,440 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:42:03,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-08-07 12:42:03,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-08-07 12:42:03,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2018-08-07 12:42:03,442 INFO L87 Difference]: Start difference. First operand 18868 states and 20505 transitions. Second operand 27 states. [2018-08-07 12:42:24,876 WARN L170 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2018-08-07 12:42:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:42:31,575 INFO L93 Difference]: Finished difference Result 44464 states and 50381 transitions. [2018-08-07 12:42:31,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-08-07 12:42:31,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1107 [2018-08-07 12:42:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:42:31,657 INFO L225 Difference]: With dead ends: 44464 [2018-08-07 12:42:31,657 INFO L226 Difference]: Without dead ends: 25785 [2018-08-07 12:42:31,712 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4610 GetRequests, 4478 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5268 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2370, Invalid=14922, Unknown=0, NotChecked=0, Total=17292 [2018-08-07 12:42:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25785 states. [2018-08-07 12:42:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25785 to 25163. [2018-08-07 12:42:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25163 states. [2018-08-07 12:42:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25163 states to 25163 states and 27821 transitions. [2018-08-07 12:42:32,267 INFO L78 Accepts]: Start accepts. Automaton has 25163 states and 27821 transitions. Word has length 1107 [2018-08-07 12:42:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:42:32,268 INFO L480 AbstractCegarLoop]: Abstraction has 25163 states and 27821 transitions. [2018-08-07 12:42:32,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-08-07 12:42:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 25163 states and 27821 transitions. [2018-08-07 12:42:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2018-08-07 12:42:32,310 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:42:32,311 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:42:32,311 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:42:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash 605677715, now seen corresponding path program 1 times [2018-08-07 12:42:32,311 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:42:32,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:32,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:32,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:32,312 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:42:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 1691 proven. 166 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2018-08-07 12:42:33,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:33,794 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:42:33,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:33,802 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:34,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 2286 proven. 6 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2018-08-07 12:42:34,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 1691 proven. 339 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-08-07 12:42:36,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:36,210 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:42:36,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:36,227 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:37,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 2286 proven. 6 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2018-08-07 12:42:37,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3866 backedges. 1691 proven. 339 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-08-07 12:42:38,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:42:38,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-08-07 12:42:38,646 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:42:38,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:42:38,648 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:42:38,648 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-08-07 12:42:38,648 INFO L87 Difference]: Start difference. First operand 25163 states and 27821 transitions. Second operand 9 states. [2018-08-07 12:42:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:42:43,578 INFO L93 Difference]: Finished difference Result 57116 states and 63449 transitions. [2018-08-07 12:42:43,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-08-07 12:42:43,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1160 [2018-08-07 12:42:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:42:43,667 INFO L225 Difference]: With dead ends: 57116 [2018-08-07 12:42:43,668 INFO L226 Difference]: Without dead ends: 32142 [2018-08-07 12:42:43,748 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4658 GetRequests, 4637 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2018-08-07 12:42:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32142 states. [2018-08-07 12:42:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32142 to 31585. [2018-08-07 12:42:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31585 states. [2018-08-07 12:42:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31585 states to 31585 states and 35059 transitions. [2018-08-07 12:42:44,442 INFO L78 Accepts]: Start accepts. Automaton has 31585 states and 35059 transitions. Word has length 1160 [2018-08-07 12:42:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:42:44,443 INFO L480 AbstractCegarLoop]: Abstraction has 31585 states and 35059 transitions. [2018-08-07 12:42:44,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:42:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 31585 states and 35059 transitions. [2018-08-07 12:42:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1423 [2018-08-07 12:42:44,472 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:42:44,473 INFO L376 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:42:44,473 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:42:44,474 INFO L82 PathProgramCache]: Analyzing trace with hash 742505579, now seen corresponding path program 1 times [2018-08-07 12:42:44,474 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:42:44,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:44,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:44,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:42:44,475 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:42:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:45,831 WARN L170 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-08-07 12:42:46,285 WARN L170 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-08-07 12:42:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1225 proven. 925 refuted. 0 times theorem prover too weak. 3843 trivial. 0 not checked. [2018-08-07 12:42:48,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:48,421 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:42:48,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:48,428 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:48,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1208 proven. 2 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-08-07 12:42:49,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1208 proven. 2 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-08-07 12:42:52,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:42:52,091 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 31 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 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:42:52,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:42:52,106 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:42:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:42:53,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:42:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 1190 proven. 20 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-08-07 12:42:54,531 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:42:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5993 backedges. 429 proven. 781 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2018-08-07 12:42:58,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:42:58,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 30 [2018-08-07 12:42:58,724 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:42:58,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-08-07 12:42:58,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-08-07 12:42:58,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2018-08-07 12:42:58,727 INFO L87 Difference]: Start difference. First operand 31585 states and 35059 transitions. Second operand 17 states. Received shutdown request... [2018-08-07 12:43:00,703 WARN L178 SmtUtils]: Removed 5 from assertion stack [2018-08-07 12:43:00,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 12:43:00,704 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:43:00,707 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:43:00,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:43:00 BoogieIcfgContainer [2018-08-07 12:43:00,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:43:00,708 INFO L168 Benchmark]: Toolchain (without parser) took 228600.46 ms. Allocated memory was 1.6 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -695.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-08-07 12:43:00,709 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:43:00,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 783.34 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-08-07 12:43:00,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 136.61 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:43:00,711 INFO L168 Benchmark]: Boogie Preprocessor took 239.66 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 804.8 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -896.2 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:43:00,711 INFO L168 Benchmark]: RCFGBuilder took 3839.62 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: 151.2 MB). Peak memory consumption was 151.2 MB. Max. memory is 7.1 GB. [2018-08-07 12:43:00,712 INFO L168 Benchmark]: TraceAbstraction took 223595.76 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -2.9 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-08-07 12:43:00,716 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 783.34 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 136.61 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 239.66 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 804.8 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -896.2 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3839.62 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: 151.2 MB). Peak memory consumption was 151.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223595.76 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -2.9 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 100). Cancelled while BasicCegarLoop was constructing difference of abstraction (31585states) and FLOYD_HOARE automaton (currently 11 states, 17 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 32. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 223.5s OverallTime, 20 OverallIterations, 12 TraceHistogramMax, 129.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1865 SDtfs, 50287 SDslu, 4993 SDs, 0 SdLazy, 75123 SolverSat, 10223 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43271 GetRequests, 42516 SyntacticMatches, 91 SemanticMatches, 663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13732 ImplicationChecksByTransitivity, 46.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31585occurred in iteration=19, 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: 4.6s AutomataMinimizationTime, 19 MinimizatonAttempts, 7663 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 10.3s SatisfiabilityAnalysisTime, 66.3s InterpolantComputationTime, 32532 NumberOfCodeBlocks, 32532 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 53688 ConstructedInterpolants, 12 QuantifiedInterpolants, 181376838 SizeOfPredicates, 101 NumberOfNonLiveVariables, 30873 ConjunctsInSsa, 541 ConjunctsInUnsatCore, 80 InterpolantComputations, 7 PerfectInterpolantSequences, 128254/141689 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label23_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-43-00-728.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label23_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_12-43-00-728.csv Completed graceful shutdown