java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-23 20:21:08,430 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 20:21:08,432 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 20:21:08,448 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 20:21:08,449 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 20:21:08,450 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 20:21:08,451 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 20:21:08,453 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 20:21:08,455 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 20:21:08,456 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 20:21:08,456 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 20:21:08,457 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 20:21:08,458 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 20:21:08,459 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 20:21:08,460 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 20:21:08,461 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 20:21:08,462 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 20:21:08,464 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 20:21:08,466 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 20:21:08,467 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 20:21:08,468 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 20:21:08,469 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 20:21:08,472 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 20:21:08,472 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 20:21:08,473 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 20:21:08,474 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 20:21:08,475 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 20:21:08,476 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 20:21:08,476 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 20:21:08,478 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 20:21:08,478 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 20:21:08,479 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 20:21:08,479 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 20:21:08,479 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 20:21:08,480 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 20:21:08,481 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 20:21:08,482 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-old.epf [2018-07-23 20:21:08,513 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 20:21:08,513 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 20:21:08,515 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-23 20:21:08,515 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-23 20:21:08,515 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-23 20:21:08,516 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-23 20:21:08,516 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-23 20:21:08,516 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-23 20:21:08,516 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-23 20:21:08,516 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-23 20:21:08,517 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-23 20:21:08,517 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-23 20:21:08,518 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-23 20:21:08,518 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-23 20:21:08,518 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-23 20:21:08,518 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-23 20:21:08,519 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-23 20:21:08,519 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-23 20:21:08,519 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-23 20:21:08,520 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 20:21:08,520 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-23 20:21:08,520 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-23 20:21:08,520 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-23 20:21:08,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 20:21:08,521 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 20:21:08,521 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-23 20:21:08,521 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-23 20:21:08,522 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-23 20:21:08,522 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-23 20:21:08,523 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-23 20:21:08,523 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 20:21:08,523 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-23 20:21:08,523 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-23 20:21:08,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 20:21:08,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 20:21:08,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 20:21:08,604 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-23 20:21:08,604 INFO L276 PluginConnector]: CDTParser initialized [2018-07-23 20:21:08,605 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41_true-unreach-call_false-termination.c [2018-07-23 20:21:09,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bf45cc8/ece71c0262764703b2ae244b8e050f40/FLAG92e58495f [2018-07-23 20:21:09,385 INFO L276 CDTParser]: Found 1 translation units. [2018-07-23 20:21:09,388 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label41_true-unreach-call_false-termination.c [2018-07-23 20:21:09,412 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bf45cc8/ece71c0262764703b2ae244b8e050f40/FLAG92e58495f [2018-07-23 20:21:09,434 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bf45cc8/ece71c0262764703b2ae244b8e050f40 [2018-07-23 20:21:09,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 20:21:09,450 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-23 20:21:09,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-23 20:21:09,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-23 20:21:09,459 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-23 20:21:09,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 08:21:09" (1/1) ... [2018-07-23 20:21:09,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f3b58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:09, skipping insertion in model container [2018-07-23 20:21:09,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 08:21:09" (1/1) ... [2018-07-23 20:21:09,678 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-23 20:21:09,956 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 20:21:09,975 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-23 20:21:10,109 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-23 20:21:10,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10 WrapperNode [2018-07-23 20:21:10,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-23 20:21:10,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-23 20:21:10,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-23 20:21:10,167 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-23 20:21:10,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-23 20:21:10,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 20:21:10,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 20:21:10,295 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 20:21:10,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... [2018-07-23 20:21:10,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 20:21:10,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 20:21:10,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 20:21:10,564 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 20:21:10,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-23 20:21:10,649 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-23 20:21:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-23 20:21:10,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-23 20:21:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-23 20:21:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 20:21:10,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 20:21:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 20:21:10,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 20:21:14,115 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 20:21:14,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 08:21:14 BoogieIcfgContainer [2018-07-23 20:21:14,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 20:21:14,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 20:21:14,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 20:21:14,128 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 20:21:14,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 08:21:09" (1/3) ... [2018-07-23 20:21:14,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c75dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 08:21:14, skipping insertion in model container [2018-07-23 20:21:14,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 08:21:10" (2/3) ... [2018-07-23 20:21:14,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c75dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 08:21:14, skipping insertion in model container [2018-07-23 20:21:14,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 08:21:14" (3/3) ... [2018-07-23 20:21:14,136 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label41_true-unreach-call_false-termination.c [2018-07-23 20:21:14,147 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-23 20:21:14,156 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 20:21:14,213 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 20:21:14,214 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 20:21:14,215 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 20:21:14,215 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-23 20:21:14,215 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 20:21:14,215 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 20:21:14,215 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 20:21:14,216 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 20:21:14,216 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 20:21:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2018-07-23 20:21:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 20:21:14,259 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 20:21:14,260 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 20:21:14,261 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 20:21:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1638523512, now seen corresponding path program 1 times [2018-07-23 20:21:14,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 20:21:14,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:14,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 20:21:14,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:14,317 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 20:21:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 20:21:14,885 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-23 20:21:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 20:21:15,025 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 20:21:15,026 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 20:21:15,026 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 20:21:15,036 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 20:21:15,052 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 20:21:15,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 20:21:15,056 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 3 states. [2018-07-23 20:21:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 20:21:16,607 INFO L93 Difference]: Finished difference Result 550 states and 941 transitions. [2018-07-23 20:21:16,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 20:21:16,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2018-07-23 20:21:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 20:21:16,630 INFO L225 Difference]: With dead ends: 550 [2018-07-23 20:21:16,630 INFO L226 Difference]: Without dead ends: 340 [2018-07-23 20:21:16,637 INFO L573 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 [2018-07-23 20:21:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-07-23 20:21:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2018-07-23 20:21:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-07-23 20:21:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 553 transitions. [2018-07-23 20:21:16,720 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 553 transitions. Word has length 92 [2018-07-23 20:21:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 20:21:16,721 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 553 transitions. [2018-07-23 20:21:16,722 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 20:21:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 553 transitions. [2018-07-23 20:21:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 20:21:16,729 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 20:21:16,729 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-23 20:21:16,729 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 20:21:16,730 INFO L82 PathProgramCache]: Analyzing trace with hash -561118379, now seen corresponding path program 1 times [2018-07-23 20:21:16,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 20:21:16,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:16,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 20:21:16,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:16,732 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 20:21:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 20:21:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 20:21:16,930 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 20:21:16,930 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-23 20:21:16,931 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 20:21:16,934 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 20:21:16,934 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 20:21:16,934 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-23 20:21:16,935 INFO L87 Difference]: Start difference. First operand 340 states and 553 transitions. Second operand 6 states. [2018-07-23 20:21:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 20:21:19,071 INFO L93 Difference]: Finished difference Result 1075 states and 1835 transitions. [2018-07-23 20:21:19,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 20:21:19,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2018-07-23 20:21:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 20:21:19,081 INFO L225 Difference]: With dead ends: 1075 [2018-07-23 20:21:19,082 INFO L226 Difference]: Without dead ends: 741 [2018-07-23 20:21:19,086 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-23 20:21:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2018-07-23 20:21:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 724. [2018-07-23 20:21:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-07-23 20:21:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1145 transitions. [2018-07-23 20:21:19,153 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1145 transitions. Word has length 103 [2018-07-23 20:21:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 20:21:19,153 INFO L471 AbstractCegarLoop]: Abstraction has 724 states and 1145 transitions. [2018-07-23 20:21:19,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 20:21:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1145 transitions. [2018-07-23 20:21:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 20:21:19,161 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 20:21:19,161 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 20:21:19,161 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 20:21:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1264235371, now seen corresponding path program 1 times [2018-07-23 20:21:19,162 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 20:21:19,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:19,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 20:21:19,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:19,164 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 20:21:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 20:21:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 20:21:19,340 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 20:21:19,341 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 20:21:19,341 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 20:21:19,342 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 20:21:19,342 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 20:21:19,342 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 20:21:19,343 INFO L87 Difference]: Start difference. First operand 724 states and 1145 transitions. Second operand 3 states. [2018-07-23 20:21:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 20:21:21,139 INFO L93 Difference]: Finished difference Result 1890 states and 3042 transitions. [2018-07-23 20:21:21,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 20:21:21,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2018-07-23 20:21:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 20:21:21,148 INFO L225 Difference]: With dead ends: 1890 [2018-07-23 20:21:21,149 INFO L226 Difference]: Without dead ends: 1172 [2018-07-23 20:21:21,154 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 20:21:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2018-07-23 20:21:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1168. [2018-07-23 20:21:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2018-07-23 20:21:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1699 transitions. [2018-07-23 20:21:21,205 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1699 transitions. Word has length 104 [2018-07-23 20:21:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 20:21:21,206 INFO L471 AbstractCegarLoop]: Abstraction has 1168 states and 1699 transitions. [2018-07-23 20:21:21,206 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 20:21:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1699 transitions. [2018-07-23 20:21:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 20:21:21,218 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 20:21:21,218 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 20:21:21,219 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 20:21:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1190454454, now seen corresponding path program 1 times [2018-07-23 20:21:21,219 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 20:21:21,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:21,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 20:21:21,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:21:21,221 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 20:21:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 20:21:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 20:21:21,517 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 20:21:21,517 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 20:21:21,518 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 137 with the following transitions: [2018-07-23 20:21:21,520 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [16], [20], [24], [28], [32], [36], [40], [44], [48], [52], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [164], [168], [172], [176], [180], [184], [188], [192], [196], [200], [204], [208], [212], [216], [220], [224], [228], [232], [236], [240], [244], [248], [252], [256], [260], [264], [271], [279], [287], [295], [303], [311], [319], [327], [335], [343], [351], [359], [367], [371], [373], [755], [756], [757], [761], [765], [771], [775], [777], [782], [783], [784], [786], [787] [2018-07-23 20:21:21,601 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 20:21:21,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 20:22:52,259 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-23 20:22:52,262 INFO L272 AbstractInterpreter]: Visited 96 different actions 161 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 42 variables. [2018-07-23 20:22:52,275 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-07-23 20:23:08,733 INFO L232 lantSequenceWeakener]: Weakened 134 states. On average, predicates are now at 80.17% of their original sizes. [2018-07-23 20:23:08,733 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-07-23 20:23:12,407 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-07-23 20:23:12,409 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-23 20:23:12,409 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-07-23 20:23:12,409 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-23 20:23:12,410 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 20:23:12,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 20:23:12,411 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2018-07-23 20:23:12,411 INFO L87 Difference]: Start difference. First operand 1168 states and 1699 transitions. Second operand 17 states. [2018-07-23 20:23:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 20:23:55,166 INFO L93 Difference]: Finished difference Result 2575 states and 3762 transitions. [2018-07-23 20:23:55,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 20:23:55,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 136 [2018-07-23 20:23:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 20:23:55,175 INFO L225 Difference]: With dead ends: 2575 [2018-07-23 20:23:55,176 INFO L226 Difference]: Without dead ends: 1226 [2018-07-23 20:23:55,182 INFO L573 BasicCegarLoop]: 2 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 20:23:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2018-07-23 20:23:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1226. [2018-07-23 20:23:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2018-07-23 20:23:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1669 transitions. [2018-07-23 20:23:55,229 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1669 transitions. Word has length 136 [2018-07-23 20:23:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 20:23:55,230 INFO L471 AbstractCegarLoop]: Abstraction has 1226 states and 1669 transitions. [2018-07-23 20:23:55,230 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 20:23:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1669 transitions. [2018-07-23 20:23:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 20:23:55,235 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 20:23:55,235 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-23 20:23:55,236 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-23 20:23:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 356010971, now seen corresponding path program 1 times [2018-07-23 20:23:55,236 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-23 20:23:55,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:23:55,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-23 20:23:55,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-23 20:23:55,238 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-23 20:23:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 20:23:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-23 20:23:55,566 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-23 20:23:55,566 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-23 20:23:55,566 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 147 with the following transitions: [2018-07-23 20:23:55,567 INFO L201 CegarAbsIntRunner]: [0], [3], [4], [8], [12], [16], [19], [20], [24], [28], [32], [36], [40], [44], [48], [52], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [164], [168], [172], [176], [180], [184], [188], [192], [196], [200], [204], [208], [212], [216], [220], [224], [228], [232], [236], [240], [244], [248], [252], [256], [260], [264], [271], [279], [287], [295], [303], [311], [319], [327], [335], [343], [351], [359], [367], [371], [373], [755], [756], [757], [761], [765], [771], [775], [777], [782], [783], [784], [786], [787] [2018-07-23 20:23:55,573 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-23 20:23:55,574 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-23 20:25:24,293 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-23 20:25:24,293 INFO L272 AbstractInterpreter]: Visited 97 different actions 164 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 42 variables. [2018-07-23 20:25:24,302 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown