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/Problem16_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:54:03,301 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:54:03,303 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:54:03,314 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:54:03,315 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:54:03,316 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:54:03,317 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:54:03,319 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:54:03,320 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:54:03,321 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:54:03,322 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:54:03,322 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:54:03,323 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:54:03,324 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:54:03,325 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:54:03,326 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:54:03,327 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:54:03,329 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:54:03,331 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:54:03,332 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:54:03,333 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:54:03,334 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:54:03,337 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-08-07 12:54:03,343 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:54:03,344 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:54:03,345 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:54:03,346 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:54:03,346 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 12:54:03,362 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:54:03,363 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:54:03,364 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:54:03,364 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:54:03,364 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:54:03,364 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:54:03,365 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:54:03,365 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:54:03,365 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:54:03,365 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:54:03,365 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:54:03,370 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:54:03,370 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:54:03,370 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:54:03,371 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:54:03,371 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:54:03,371 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:54:03,372 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:54:03,372 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:54:03,372 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:54:03,372 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:54:03,374 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:54:03,374 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:54:03,374 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:54:03,374 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:54:03,374 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:54:03,375 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:54:03,375 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:54:03,375 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:54:03,375 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:54:03,376 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:54:03,376 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:54:03,376 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:54:03,441 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:54:03,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:54:03,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:54:03,462 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:54:03,463 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:54:03,463 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16_true-unreach-call.c [2018-08-07 12:54:03,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0405ed386/5f8a8e8ea0524a079bb6019ce00c9344/FLAGa64ab31a8 [2018-08-07 12:54:04,189 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:54:04,190 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16_true-unreach-call.c [2018-08-07 12:54:04,213 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0405ed386/5f8a8e8ea0524a079bb6019ce00c9344/FLAGa64ab31a8 [2018-08-07 12:54:04,231 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0405ed386/5f8a8e8ea0524a079bb6019ce00c9344 [2018-08-07 12:54:04,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:54:04,246 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:54:04,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:54:04,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:54:04,257 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:54:04,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:54:04" (1/1) ... [2018-08-07 12:54:04,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cbbfe11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:04, skipping insertion in model container [2018-08-07 12:54:04,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:54:04" (1/1) ... [2018-08-07 12:54:04,508 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:54:05,023 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:54:05,040 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:54:05,288 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:54:05,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05 WrapperNode [2018-08-07 12:54:05,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:54:05,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:54:05,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:54:05,383 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:54:05,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:54:05,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:54:05,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:54:05,567 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:54:05,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:05,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (1/1) ... [2018-08-07 12:54:06,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:54:06,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:54:06,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:54:06,012 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:54:06,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (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 12:54:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:54:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:54:06,091 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:54:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:54:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:54:06,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:54:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:54:06,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:54:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 12:54:06,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 12:54:12,030 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:54:12,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:54:12 BoogieIcfgContainer [2018-08-07 12:54:12,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:54:12,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:54:12,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:54:12,036 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:54:12,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:54:04" (1/3) ... [2018-08-07 12:54:12,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9bd669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:54:12, skipping insertion in model container [2018-08-07 12:54:12,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:54:05" (2/3) ... [2018-08-07 12:54:12,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9bd669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:54:12, skipping insertion in model container [2018-08-07 12:54:12,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:54:12" (3/3) ... [2018-08-07 12:54:12,040 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label16_true-unreach-call.c [2018-08-07 12:54:12,050 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:54:12,063 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:54:12,120 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:54:12,121 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:54:12,121 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:54:12,121 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:54:12,121 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:54:12,121 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:54:12,121 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:54:12,122 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:54:12,122 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:54:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-08-07 12:54:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-08-07 12:54:12,169 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:12,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:54:12,171 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:54:12,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1104926663, now seen corresponding path program 1 times [2018-08-07 12:54:12,179 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:12,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:12,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:12,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:12,228 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:12,670 WARN L170 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:54:12,787 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 12:54:12,790 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:12,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:54:12,791 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:12,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:54:12,813 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:54:12,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:54:12,817 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-08-07 12:54:16,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:16,134 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-08-07 12:54:16,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:54:16,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-08-07 12:54:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:16,160 INFO L225 Difference]: With dead ends: 1156 [2018-08-07 12:54:16,160 INFO L226 Difference]: Without dead ends: 744 [2018-08-07 12:54:16,169 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:54:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-08-07 12:54:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-08-07 12:54:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-08-07 12:54:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1317 transitions. [2018-08-07 12:54:16,280 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1317 transitions. Word has length 49 [2018-08-07 12:54:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:16,280 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1317 transitions. [2018-08-07 12:54:16,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:54:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1317 transitions. [2018-08-07 12:54:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-08-07 12:54:16,288 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:16,288 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, 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] [2018-08-07 12:54:16,289 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:54:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1306133418, now seen corresponding path program 1 times [2018-08-07 12:54:16,289 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:16,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:16,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:16,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:16,291 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:16,651 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:16,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:54:16,651 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:16,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:54:16,653 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:54:16,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:16,654 INFO L87 Difference]: Start difference. First operand 744 states and 1317 transitions. Second operand 6 states. [2018-08-07 12:54:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:24,236 INFO L93 Difference]: Finished difference Result 2840 states and 5175 transitions. [2018-08-07 12:54:24,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:24,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-08-07 12:54:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:24,253 INFO L225 Difference]: With dead ends: 2840 [2018-08-07 12:54:24,253 INFO L226 Difference]: Without dead ends: 2102 [2018-08-07 12:54:24,262 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:54:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2018-08-07 12:54:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2081. [2018-08-07 12:54:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2018-08-07 12:54:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3312 transitions. [2018-08-07 12:54:24,343 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3312 transitions. Word has length 125 [2018-08-07 12:54:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:24,344 INFO L480 AbstractCegarLoop]: Abstraction has 2081 states and 3312 transitions. [2018-08-07 12:54:24,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:54:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3312 transitions. [2018-08-07 12:54:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-08-07 12:54:24,349 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:24,349 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, 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] [2018-08-07 12:54:24,349 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:54:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 883150210, now seen corresponding path program 1 times [2018-08-07 12:54:24,350 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:24,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:24,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:24,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:24,351 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:24,594 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:24,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:54:24,594 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:24,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:54:24,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:54:24,595 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:24,596 INFO L87 Difference]: Start difference. First operand 2081 states and 3312 transitions. Second operand 6 states. [2018-08-07 12:54:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:29,845 INFO L93 Difference]: Finished difference Result 4872 states and 7867 transitions. [2018-08-07 12:54:29,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:29,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2018-08-07 12:54:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:29,870 INFO L225 Difference]: With dead ends: 4872 [2018-08-07 12:54:29,870 INFO L226 Difference]: Without dead ends: 2797 [2018-08-07 12:54:29,881 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:54:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2018-08-07 12:54:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2772. [2018-08-07 12:54:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2772 states. [2018-08-07 12:54:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4108 transitions. [2018-08-07 12:54:29,970 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4108 transitions. Word has length 131 [2018-08-07 12:54:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:29,971 INFO L480 AbstractCegarLoop]: Abstraction has 2772 states and 4108 transitions. [2018-08-07 12:54:29,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:54:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4108 transitions. [2018-08-07 12:54:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-08-07 12:54:29,974 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:29,975 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, 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] [2018-08-07 12:54:29,975 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:54:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash 901960161, now seen corresponding path program 1 times [2018-08-07 12:54:29,975 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:29,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:29,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:29,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:29,977 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:30,143 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:30,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:54:30,144 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:30,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:54:30,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:54:30,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:30,145 INFO L87 Difference]: Start difference. First operand 2772 states and 4108 transitions. Second operand 6 states. [2018-08-07 12:54:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:33,491 INFO L93 Difference]: Finished difference Result 7301 states and 11345 transitions. [2018-08-07 12:54:33,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:33,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2018-08-07 12:54:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:33,519 INFO L225 Difference]: With dead ends: 7301 [2018-08-07 12:54:33,519 INFO L226 Difference]: Without dead ends: 4535 [2018-08-07 12:54:33,529 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:54:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2018-08-07 12:54:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 4515. [2018-08-07 12:54:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4515 states. [2018-08-07 12:54:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 6567 transitions. [2018-08-07 12:54:33,650 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 6567 transitions. Word has length 134 [2018-08-07 12:54:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:33,651 INFO L480 AbstractCegarLoop]: Abstraction has 4515 states and 6567 transitions. [2018-08-07 12:54:33,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:54:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 6567 transitions. [2018-08-07 12:54:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-08-07 12:54:33,653 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:33,653 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, 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] [2018-08-07 12:54:33,653 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:54:33,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2022590026, now seen corresponding path program 1 times [2018-08-07 12:54:33,654 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:33,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:33,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:33,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:33,655 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:33,890 WARN L170 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:54:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:34,128 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:54:34,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:54:34,128 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:34,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:54:34,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:54:34,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:34,129 INFO L87 Difference]: Start difference. First operand 4515 states and 6567 transitions. Second operand 6 states. [2018-08-07 12:54:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:39,744 INFO L93 Difference]: Finished difference Result 9747 states and 14265 transitions. [2018-08-07 12:54:39,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:54:39,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2018-08-07 12:54:39,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:39,771 INFO L225 Difference]: With dead ends: 9747 [2018-08-07 12:54:39,772 INFO L226 Difference]: Without dead ends: 5238 [2018-08-07 12:54:39,788 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:54:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2018-08-07 12:54:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 5224. [2018-08-07 12:54:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5224 states. [2018-08-07 12:54:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5224 states to 5224 states and 6941 transitions. [2018-08-07 12:54:39,930 INFO L78 Accepts]: Start accepts. Automaton has 5224 states and 6941 transitions. Word has length 135 [2018-08-07 12:54:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:39,931 INFO L480 AbstractCegarLoop]: Abstraction has 5224 states and 6941 transitions. [2018-08-07 12:54:39,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:54:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5224 states and 6941 transitions. [2018-08-07 12:54:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-08-07 12:54:39,933 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:39,934 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, 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 12:54:39,934 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:54:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1773657974, now seen corresponding path program 1 times [2018-08-07 12:54:39,934 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:39,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:39,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:39,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:39,944 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:40,236 WARN L170 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:54:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-08-07 12:54:40,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:54:40,264 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 12:54:40,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:40,279 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:54:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:40,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:54:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:40,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:54:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:54:40,874 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:54:40,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-08-07 12:54:40,874 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:54:40,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:54:40,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:54:40,875 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:40,876 INFO L87 Difference]: Start difference. First operand 5224 states and 6941 transitions. Second operand 3 states. [2018-08-07 12:54:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:54:44,912 INFO L93 Difference]: Finished difference Result 13145 states and 17750 transitions. [2018-08-07 12:54:44,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:54:44,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2018-08-07 12:54:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:54:44,960 INFO L225 Difference]: With dead ends: 13145 [2018-08-07 12:54:44,960 INFO L226 Difference]: Without dead ends: 7927 [2018-08-07 12:54:45,002 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:54:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2018-08-07 12:54:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7927. [2018-08-07 12:54:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7927 states. [2018-08-07 12:54:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7927 states to 7927 states and 10091 transitions. [2018-08-07 12:54:45,201 INFO L78 Accepts]: Start accepts. Automaton has 7927 states and 10091 transitions. Word has length 141 [2018-08-07 12:54:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:54:45,201 INFO L480 AbstractCegarLoop]: Abstraction has 7927 states and 10091 transitions. [2018-08-07 12:54:45,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:54:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7927 states and 10091 transitions. [2018-08-07 12:54:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-08-07 12:54:45,220 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:54:45,220 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:54:45,220 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:54:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1977777431, now seen corresponding path program 1 times [2018-08-07 12:54:45,221 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:54:45,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:45,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:45,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:54:45,227 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:54:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:45,902 WARN L170 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-08-07 12:54:46,440 WARN L170 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-08-07 12:54:47,150 WARN L170 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2018-08-07 12:54:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 230 proven. 115 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-08-07 12:54:47,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:54:47,832 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 12:54:47,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:47,840 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:54:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:47,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:54:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-08-07 12:54:48,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:54:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-08-07 12:54:48,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:54:48,474 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:54:48,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:54:48,493 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:54:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:54:48,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:54:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-08-07 12:54:49,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:54:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-08-07 12:54:49,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:54:49,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 20 [2018-08-07 12:54:49,624 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:54:49,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-08-07 12:54:49,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-08-07 12:54:49,625 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2018-08-07 12:54:49,626 INFO L87 Difference]: Start difference. First operand 7927 states and 10091 transitions. Second operand 13 states. [2018-08-07 12:54:50,297 WARN L170 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2018-08-07 12:54:52,704 WARN L170 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-08-07 12:54:58,678 WARN L170 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-08-07 12:55:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:02,871 INFO L93 Difference]: Finished difference Result 21678 states and 28214 transitions. [2018-08-07 12:55:02,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-08-07 12:55:02,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 396 [2018-08-07 12:55:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:02,925 INFO L225 Difference]: With dead ends: 21678 [2018-08-07 12:55:02,925 INFO L226 Difference]: Without dead ends: 13757 [2018-08-07 12:55:02,966 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1601 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=597, Invalid=1953, Unknown=0, NotChecked=0, Total=2550 [2018-08-07 12:55:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2018-08-07 12:55:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13338. [2018-08-07 12:55:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13338 states. [2018-08-07 12:55:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13338 states to 13338 states and 16218 transitions. [2018-08-07 12:55:03,290 INFO L78 Accepts]: Start accepts. Automaton has 13338 states and 16218 transitions. Word has length 396 [2018-08-07 12:55:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:03,290 INFO L480 AbstractCegarLoop]: Abstraction has 13338 states and 16218 transitions. [2018-08-07 12:55:03,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-08-07 12:55:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 13338 states and 16218 transitions. [2018-08-07 12:55:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2018-08-07 12:55:03,331 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:03,332 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:03,332 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1501842978, now seen corresponding path program 1 times [2018-08-07 12:55:03,333 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:03,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:03,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:03,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:03,334 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 365 proven. 115 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-08-07 12:55:04,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:04,368 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:55:04,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:04,503 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:04,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 641 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-08-07 12:55:05,043 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 365 proven. 115 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-08-07 12:55:05,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:05,364 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:55:05,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:05,383 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:05,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 641 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-08-07 12:55:06,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:06,573 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-08-07 12:55:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 365 proven. 115 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-08-07 12:55:07,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:55:07,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:55:07,069 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:55:07,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:55:07,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:55:07,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:55:07,071 INFO L87 Difference]: Start difference. First operand 13338 states and 16218 transitions. Second operand 9 states. [2018-08-07 12:55:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:14,388 INFO L93 Difference]: Finished difference Result 28357 states and 35040 transitions. [2018-08-07 12:55:14,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 12:55:14,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 628 [2018-08-07 12:55:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:14,449 INFO L225 Difference]: With dead ends: 28357 [2018-08-07 12:55:14,449 INFO L226 Difference]: Without dead ends: 15044 [2018-08-07 12:55:14,493 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2528 GetRequests, 2508 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-08-07 12:55:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15044 states. [2018-08-07 12:55:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15044 to 15026. [2018-08-07 12:55:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15026 states. [2018-08-07 12:55:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15026 states to 15026 states and 17992 transitions. [2018-08-07 12:55:14,967 INFO L78 Accepts]: Start accepts. Automaton has 15026 states and 17992 transitions. Word has length 628 [2018-08-07 12:55:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:14,968 INFO L480 AbstractCegarLoop]: Abstraction has 15026 states and 17992 transitions. [2018-08-07 12:55:14,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:55:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15026 states and 17992 transitions. [2018-08-07 12:55:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-08-07 12:55:15,025 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:15,026 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:15,026 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:15,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1302555217, now seen corresponding path program 1 times [2018-08-07 12:55:15,031 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:15,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:15,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:15,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:15,033 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:15,587 WARN L170 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:55:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 489 proven. 237 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-08-07 12:55:16,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:16,583 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:55:16,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:16,590 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:16,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-08-07 12:55:17,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-08-07 12:55:17,521 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:55:17,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-08-07 12:55:17,523 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:55:17,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:55:17,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:55:17,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:55:17,524 INFO L87 Difference]: Start difference. First operand 15026 states and 17992 transitions. Second operand 3 states. [2018-08-07 12:55:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:21,188 INFO L93 Difference]: Finished difference Result 30027 states and 35947 transitions. [2018-08-07 12:55:21,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:55:21,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 675 [2018-08-07 12:55:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:21,234 INFO L225 Difference]: With dead ends: 30027 [2018-08-07 12:55:21,235 INFO L226 Difference]: Without dead ends: 15026 [2018-08-07 12:55:21,267 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1363 GetRequests, 1351 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:55:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15026 states. [2018-08-07 12:55:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15026 to 14677. [2018-08-07 12:55:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14677 states. [2018-08-07 12:55:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14677 states to 14677 states and 16874 transitions. [2018-08-07 12:55:21,507 INFO L78 Accepts]: Start accepts. Automaton has 14677 states and 16874 transitions. Word has length 675 [2018-08-07 12:55:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:21,508 INFO L480 AbstractCegarLoop]: Abstraction has 14677 states and 16874 transitions. [2018-08-07 12:55:21,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:55:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 14677 states and 16874 transitions. [2018-08-07 12:55:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2018-08-07 12:55:21,579 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:21,580 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:21,580 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1391455199, now seen corresponding path program 1 times [2018-08-07 12:55:21,581 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:21,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:21,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:21,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:21,583 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 936 proven. 156 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2018-08-07 12:55:23,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:23,082 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 12:55:23,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:23,091 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:23,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 726 proven. 2 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-08-07 12:55:23,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 726 proven. 2 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-08-07 12:55:24,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:24,459 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 12:55:24,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:24,478 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:25,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 936 proven. 6 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2018-08-07 12:55:25,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 938 proven. 4 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2018-08-07 12:55:26,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:55:26,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:55:26,015 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:55:26,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:55:26,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:55:26,017 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:55:26,018 INFO L87 Difference]: Start difference. First operand 14677 states and 16874 transitions. Second operand 9 states. [2018-08-07 12:55:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:32,055 INFO L93 Difference]: Finished difference Result 33161 states and 38590 transitions. [2018-08-07 12:55:32,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-08-07 12:55:32,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 836 [2018-08-07 12:55:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:32,123 INFO L225 Difference]: With dead ends: 33161 [2018-08-07 12:55:32,124 INFO L226 Difference]: Without dead ends: 14051 [2018-08-07 12:55:32,170 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3366 GetRequests, 3345 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-08-07 12:55:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14051 states. [2018-08-07 12:55:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14051 to 13512. [2018-08-07 12:55:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13512 states. [2018-08-07 12:55:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 14412 transitions. [2018-08-07 12:55:32,438 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 14412 transitions. Word has length 836 [2018-08-07 12:55:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:32,440 INFO L480 AbstractCegarLoop]: Abstraction has 13512 states and 14412 transitions. [2018-08-07 12:55:32,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:55:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 14412 transitions. [2018-08-07 12:55:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1107 [2018-08-07 12:55:32,490 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:32,491 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:55:32,491 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1841649055, now seen corresponding path program 1 times [2018-08-07 12:55:32,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:32,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:32,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:32,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:32,493 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 673 proven. 390 refuted. 0 times theorem prover too weak. 1621 trivial. 0 not checked. [2018-08-07 12:55:33,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:33,842 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 12:55:33,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:33,850 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:34,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 1929 proven. 2 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2018-08-07 12:55:35,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 673 proven. 390 refuted. 0 times theorem prover too weak. 1621 trivial. 0 not checked. [2018-08-07 12:55:36,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:36,156 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 12:55:36,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:36,173 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:36,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 1929 proven. 2 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2018-08-07 12:55:37,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 673 proven. 390 refuted. 0 times theorem prover too weak. 1621 trivial. 0 not checked. [2018-08-07 12:55:38,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:55:38,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:55:38,165 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:55:38,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:55:38,167 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:55:38,167 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:55:38,167 INFO L87 Difference]: Start difference. First operand 13512 states and 14412 transitions. Second operand 9 states. [2018-08-07 12:55:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:44,345 INFO L93 Difference]: Finished difference Result 27649 states and 30197 transitions. [2018-08-07 12:55:44,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-08-07 12:55:44,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1106 [2018-08-07 12:55:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:44,417 INFO L225 Difference]: With dead ends: 27649 [2018-08-07 12:55:44,418 INFO L226 Difference]: Without dead ends: 14193 [2018-08-07 12:55:44,459 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4451 GetRequests, 4425 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-08-07 12:55:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14193 states. [2018-08-07 12:55:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14193 to 13862. [2018-08-07 12:55:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13862 states. [2018-08-07 12:55:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13862 states to 13862 states and 14585 transitions. [2018-08-07 12:55:44,739 INFO L78 Accepts]: Start accepts. Automaton has 13862 states and 14585 transitions. Word has length 1106 [2018-08-07 12:55:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:44,740 INFO L480 AbstractCegarLoop]: Abstraction has 13862 states and 14585 transitions. [2018-08-07 12:55:44,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:55:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 13862 states and 14585 transitions. [2018-08-07 12:55:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2018-08-07 12:55:44,773 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:44,774 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:44,774 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2145644181, now seen corresponding path program 1 times [2018-08-07 12:55:44,775 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:44,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:44,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:44,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:44,777 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2018-08-07 12:55:45,894 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:55:45,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:55:45,894 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:55:45,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:55:45,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:55:45,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:55:45,896 INFO L87 Difference]: Start difference. First operand 13862 states and 14585 transitions. Second operand 4 states. [2018-08-07 12:55:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:55:48,887 INFO L93 Difference]: Finished difference Result 47519 states and 50285 transitions. [2018-08-07 12:55:48,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:55:48,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1134 [2018-08-07 12:55:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:55:49,012 INFO L225 Difference]: With dead ends: 47519 [2018-08-07 12:55:49,012 INFO L226 Difference]: Without dead ends: 32988 [2018-08-07 12:55:49,079 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:55:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32988 states. [2018-08-07 12:55:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32988 to 29857. [2018-08-07 12:55:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29857 states. [2018-08-07 12:55:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29857 states to 29857 states and 31284 transitions. [2018-08-07 12:55:49,624 INFO L78 Accepts]: Start accepts. Automaton has 29857 states and 31284 transitions. Word has length 1134 [2018-08-07 12:55:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:55:49,625 INFO L480 AbstractCegarLoop]: Abstraction has 29857 states and 31284 transitions. [2018-08-07 12:55:49,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:55:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29857 states and 31284 transitions. [2018-08-07 12:55:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1371 [2018-08-07 12:55:49,718 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:55:49,719 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 12:55:49,719 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:55:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1284096149, now seen corresponding path program 1 times [2018-08-07 12:55:49,720 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:55:49,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:49,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:49,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:55:49,721 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:55:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 808 proven. 575 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2018-08-07 12:55:53,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:55:53,614 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 12:55:53,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:55:53,622 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:55:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:55:54,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:55:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 1078 proven. 0 refuted. 0 times theorem prover too weak. 2258 trivial. 0 not checked. [2018-08-07 12:55:55,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:55:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 294 proven. 1012 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2018-08-07 12:55:58,386 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:55:58,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 16 [2018-08-07 12:55:58,387 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:55:58,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:55:58,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:55:58,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:55:58,388 INFO L87 Difference]: Start difference. First operand 29857 states and 31284 transitions. Second operand 6 states. [2018-08-07 12:56:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:56:03,186 INFO L93 Difference]: Finished difference Result 60863 states and 63733 transitions. [2018-08-07 12:56:03,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 12:56:03,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1370 [2018-08-07 12:56:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:56:03,282 INFO L225 Difference]: With dead ends: 60863 [2018-08-07 12:56:03,283 INFO L226 Difference]: Without dead ends: 31017 [2018-08-07 12:56:03,359 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2753 GetRequests, 2734 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-08-07 12:56:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2018-08-07 12:56:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 30545. [2018-08-07 12:56:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30545 states. [2018-08-07 12:56:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30545 states to 30545 states and 31958 transitions. [2018-08-07 12:56:03,872 INFO L78 Accepts]: Start accepts. Automaton has 30545 states and 31958 transitions. Word has length 1370 [2018-08-07 12:56:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:56:03,873 INFO L480 AbstractCegarLoop]: Abstraction has 30545 states and 31958 transitions. [2018-08-07 12:56:03,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:56:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30545 states and 31958 transitions. [2018-08-07 12:56:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1611 [2018-08-07 12:56:03,973 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:03,974 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, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 12:56:03,974 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:56:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1555542246, now seen corresponding path program 1 times [2018-08-07 12:56:03,975 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:03,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:03,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:03,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:03,976 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:05,609 WARN L170 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-08-07 12:56:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4640 backedges. 384 proven. 2226 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2018-08-07 12:56:08,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:08,997 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:56:09,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:09,005 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:09,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4640 backedges. 3290 proven. 2 refuted. 0 times theorem prover too weak. 1348 trivial. 0 not checked. [2018-08-07 12:56:11,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:12,224 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:56:12,330 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:56:12,448 WARN L170 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:56:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4640 backedges. 1108 proven. 575 refuted. 0 times theorem prover too weak. 2957 trivial. 0 not checked. [2018-08-07 12:56:15,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:15,542 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:56:15,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:15,559 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:16,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4640 backedges. 3290 proven. 2 refuted. 0 times theorem prover too weak. 1348 trivial. 0 not checked. [2018-08-07 12:56:19,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4640 backedges. 1108 proven. 575 refuted. 0 times theorem prover too weak. 2957 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (14)] Exception during sending of exit command (exit): Broken pipe [2018-08-07 12:56:23,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:56:23,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6, 7, 8] total 31 [2018-08-07 12:56:23,797 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:56:23,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-08-07 12:56:23,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-08-07 12:56:23,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2018-08-07 12:56:23,802 INFO L87 Difference]: Start difference. First operand 30545 states and 31958 transitions. Second operand 18 states. [2018-08-07 12:56:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:56:39,702 INFO L93 Difference]: Finished difference Result 69112 states and 72625 transitions. [2018-08-07 12:56:39,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-08-07 12:56:39,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1610 [2018-08-07 12:56:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:56:39,776 INFO L225 Difference]: With dead ends: 69112 [2018-08-07 12:56:39,776 INFO L226 Difference]: Without dead ends: 38977 [2018-08-07 12:56:39,834 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6513 GetRequests, 6445 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=692, Invalid=3090, Unknown=0, NotChecked=0, Total=3782 [2018-08-07 12:56:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38977 states. [2018-08-07 12:56:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38977 to 38454. [2018-08-07 12:56:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38454 states. [2018-08-07 12:56:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38454 states to 38454 states and 40156 transitions. [2018-08-07 12:56:40,377 INFO L78 Accepts]: Start accepts. Automaton has 38454 states and 40156 transitions. Word has length 1610 [2018-08-07 12:56:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:56:40,378 INFO L480 AbstractCegarLoop]: Abstraction has 38454 states and 40156 transitions. [2018-08-07 12:56:40,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-08-07 12:56:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 38454 states and 40156 transitions. [2018-08-07 12:56:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1681 [2018-08-07 12:56:40,449 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:40,450 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, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:56:40,450 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:56:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash 513432303, now seen corresponding path program 1 times [2018-08-07 12:56:40,451 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:40,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:40,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:40,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:40,452 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:41,933 WARN L170 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2018-08-07 12:56:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4616 backedges. 1192 proven. 1503 refuted. 0 times theorem prover too weak. 1921 trivial. 0 not checked. [2018-08-07 12:56:45,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:45,227 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:56:45,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:45,372 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:45,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4616 backedges. 2469 proven. 6 refuted. 0 times theorem prover too weak. 2141 trivial. 0 not checked. [2018-08-07 12:56:47,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4616 backedges. 320 proven. 2345 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2018-08-07 12:56:52,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:52,476 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:56:52,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:52,499 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:53,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:59,978 WARN L170 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2018-08-07 12:57:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4616 backedges. 3257 proven. 2 refuted. 0 times theorem prover too weak. 1357 trivial. 0 not checked. [2018-08-07 12:57:03,285 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4616 backedges. 1115 proven. 575 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-08-07 12:57:07,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:57:07,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8, 7, 8] total 40 [2018-08-07 12:57:07,728 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:57:07,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-08-07 12:57:07,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-08-07 12:57:07,730 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2018-08-07 12:57:07,731 INFO L87 Difference]: Start difference. First operand 38454 states and 40156 transitions. Second operand 24 states. [2018-08-07 12:57:13,237 WARN L170 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2018-08-07 12:57:18,239 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2018-08-07 12:57:24,330 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2018-08-07 12:57:27,663 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2018-08-07 12:57:32,361 WARN L170 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-08-07 12:57:37,284 WARN L170 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2018-08-07 12:57:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:46,383 INFO L93 Difference]: Finished difference Result 84509 states and 90756 transitions. [2018-08-07 12:57:46,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-08-07 12:57:46,383 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1680 [2018-08-07 12:57:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:46,386 INFO L225 Difference]: With dead ends: 84509 [2018-08-07 12:57:46,386 INFO L226 Difference]: Without dead ends: 0 [2018-08-07 12:57:46,605 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6924 GetRequests, 6790 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5691 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=2132, Invalid=15424, Unknown=0, NotChecked=0, Total=17556 [2018-08-07 12:57:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-08-07 12:57:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-08-07 12:57:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-08-07 12:57:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-08-07 12:57:46,607 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1680 [2018-08-07 12:57:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:46,608 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-08-07 12:57:46,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-08-07 12:57:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-08-07 12:57:46,608 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-08-07 12:57:46,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-08-07 12:57:46,698 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,798 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,799 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,856 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,857 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,873 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,874 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:46,874 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,051 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,104 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,106 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,107 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,374 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-08-07 12:57:47,498 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-08-07 12:57:53,701 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-08-07 12:57:53,703 INFO L168 Benchmark]: Toolchain (without parser) took 229458.98 ms. Allocated memory was 1.5 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: -720.9 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-08-07 12:57:53,705 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:57:53,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1134.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:57:53,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 183.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:57:53,706 INFO L168 Benchmark]: Boogie Preprocessor took 445.13 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 835.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -978.5 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-08-07 12:57:53,708 INFO L168 Benchmark]: RCFGBuilder took 6019.38 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 273.1 MB). Peak memory consumption was 273.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:57:53,708 INFO L168 Benchmark]: TraceAbstraction took 221670.11 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -131.8 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-08-07 12:57:53,718 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1134.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 183.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 445.13 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 835.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -978.5 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6019.38 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 273.1 MB). Peak memory consumption was 273.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221670.11 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.1 GB in the end (delta: -131.8 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 744. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label16_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-57-53-733.csv Completed graceful shutdown