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/Problem12_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:18:47,460 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:18:47,462 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:18:47,479 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:18:47,479 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:18:47,480 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:18:47,481 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:18:47,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:18:47,488 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:18:47,489 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:18:47,491 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:18:47,491 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:18:47,492 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:18:47,493 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:18:47,501 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:18:47,502 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:18:47,505 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:18:47,507 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:18:47,511 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:18:47,512 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:18:47,513 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:18:47,514 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:18:47,516 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 12:18:47,517 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 12:18:47,517 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 12:18:47,518 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 12:18:47,519 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 12:18:47,519 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 12:18:47,520 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 12:18:47,521 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 12:18:47,521 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 12:18:47,522 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 12:18:47,522 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:18:47,522 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:18:47,523 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:18:47,524 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:18:47,524 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 12:18:47,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:18:47,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:18:47,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:18:47,540 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:18:47,540 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:18:47,540 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:18:47,541 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:18:47,541 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:18:47,541 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:18:47,541 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:18:47,541 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:18:47,542 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:18:47,542 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:18:47,542 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:18:47,543 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:18:47,543 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:18:47,543 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:18:47,543 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:18:47,543 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:18:47,544 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:18:47,544 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:18:47,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:18:47,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:18:47,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:18:47,545 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:18:47,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:18:47,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:18:47,545 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:18:47,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:18:47,546 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:18:47,546 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:18:47,546 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:18:47,546 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:18:47,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:18:47,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:18:47,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:18:47,615 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:18:47,615 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:18:47,616 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label05_true-unreach-call.c [2018-08-07 12:18:47,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784cc991a/df249dfa77f24de785f887c7d9937e8d/FLAG873aa0ca6 [2018-08-07 12:18:48,478 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:18:48,479 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label05_true-unreach-call.c [2018-08-07 12:18:48,508 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784cc991a/df249dfa77f24de785f887c7d9937e8d/FLAG873aa0ca6 [2018-08-07 12:18:48,525 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784cc991a/df249dfa77f24de785f887c7d9937e8d [2018-08-07 12:18:48,538 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:18:48,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:18:48,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:18:48,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:18:48,549 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:18:48,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:18:48" (1/1) ... [2018-08-07 12:18:48,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d23126d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:48, skipping insertion in model container [2018-08-07 12:18:48,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:18:48" (1/1) ... [2018-08-07 12:18:48,941 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:18:50,018 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:18:50,037 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:18:50,713 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:18:50,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50 WrapperNode [2018-08-07 12:18:50,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:18:50,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:18:50,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:18:50,957 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:18:50,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:51,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:51,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:18:51,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:18:51,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:18:51,250 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:18:51,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:51,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:51,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:51,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:52,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:52,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:52,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (1/1) ... [2018-08-07 12:18:52,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:18:52,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:18:52,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:18:52,186 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:18:52,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (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 12:18:52,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:18:52,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:18:52,266 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 12:18:52,266 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 12:18:52,266 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_output3 [2018-08-07 12:18:52,266 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_output3 [2018-08-07 12:18:52,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:18:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:18:52,267 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_output4 [2018-08-07 12:18:52,267 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_output4 [2018-08-07 12:18:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:18:52,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:18:52,268 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 12:18:52,268 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 12:19:06,057 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:19:06,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:19:06 BoogieIcfgContainer [2018-08-07 12:19:06,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:19:06,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:19:06,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:19:06,062 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:19:06,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:18:48" (1/3) ... [2018-08-07 12:19:06,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5980c483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:19:06, skipping insertion in model container [2018-08-07 12:19:06,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:18:50" (2/3) ... [2018-08-07 12:19:06,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5980c483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:19:06, skipping insertion in model container [2018-08-07 12:19:06,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:19:06" (3/3) ... [2018-08-07 12:19:06,066 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label05_true-unreach-call.c [2018-08-07 12:19:06,076 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:19:06,085 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:19:06,154 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:19:06,155 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:19:06,155 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:19:06,156 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:19:06,156 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:19:06,156 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:19:06,156 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:19:06,156 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:19:06,156 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:19:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-08-07 12:19:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-08-07 12:19:06,217 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:19:06,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:19:06,220 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 12:19:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash -878392940, now seen corresponding path program 1 times [2018-08-07 12:19:06,228 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:19:06,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:06,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:06,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:06,281 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:19:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:06,736 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:19:06,770 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 12:19:06,772 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:19:06,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:19:06,773 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:19:06,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:19:06,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:19:06,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:19:06,798 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-08-07 12:19:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:19:16,269 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-08-07 12:19:16,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:19:16,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2018-08-07 12:19:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:19:16,305 INFO L225 Difference]: With dead ends: 2446 [2018-08-07 12:19:16,305 INFO L226 Difference]: Without dead ends: 1604 [2018-08-07 12:19:16,315 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:19:16,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-08-07 12:19:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-08-07 12:19:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-08-07 12:19:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2969 transitions. [2018-08-07 12:19:16,478 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2969 transitions. Word has length 66 [2018-08-07 12:19:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:19:16,479 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2969 transitions. [2018-08-07 12:19:16,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:19:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2969 transitions. [2018-08-07 12:19:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-08-07 12:19:16,487 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:19:16,488 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, 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] [2018-08-07 12:19:16,488 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 12:19:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash 714333242, now seen corresponding path program 1 times [2018-08-07 12:19:16,489 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:19:16,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:16,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:16,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:16,490 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:19:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:19:16,899 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:19:16,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:19:16,900 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:19:16,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:19:16,902 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:19:16,903 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:19:16,903 INFO L87 Difference]: Start difference. First operand 1604 states and 2969 transitions. Second operand 6 states. [2018-08-07 12:19:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:19:38,233 INFO L93 Difference]: Finished difference Result 6335 states and 11924 transitions. [2018-08-07 12:19:38,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:19:38,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-08-07 12:19:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:19:38,269 INFO L225 Difference]: With dead ends: 6335 [2018-08-07 12:19:38,269 INFO L226 Difference]: Without dead ends: 4737 [2018-08-07 12:19:38,279 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 12:19:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4737 states. [2018-08-07 12:19:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4737 to 4705. [2018-08-07 12:19:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4705 states. [2018-08-07 12:19:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4705 states to 4705 states and 7581 transitions. [2018-08-07 12:19:38,441 INFO L78 Accepts]: Start accepts. Automaton has 4705 states and 7581 transitions. Word has length 140 [2018-08-07 12:19:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:19:38,442 INFO L480 AbstractCegarLoop]: Abstraction has 4705 states and 7581 transitions. [2018-08-07 12:19:38,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:19:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4705 states and 7581 transitions. [2018-08-07 12:19:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-08-07 12:19:38,455 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:19:38,455 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:19:38,456 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 12:19:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -238687082, now seen corresponding path program 1 times [2018-08-07 12:19:38,457 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:19:38,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:38,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:38,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:38,459 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:19:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-08-07 12:19:38,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:19:38,672 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 12:19:38,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:38,683 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:19:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:38,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:19:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-08-07 12:19:39,016 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:19:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-08-07 12:19:39,587 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:19:39,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2018-08-07 12:19:39,588 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:19:39,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:19:39,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:19:39,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-08-07 12:19:39,589 INFO L87 Difference]: Start difference. First operand 4705 states and 7581 transitions. Second operand 4 states. [2018-08-07 12:19:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:19:50,619 INFO L93 Difference]: Finished difference Result 14071 states and 23072 transitions. [2018-08-07 12:19:50,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:19:50,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2018-08-07 12:19:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:19:50,669 INFO L225 Difference]: With dead ends: 14071 [2018-08-07 12:19:50,670 INFO L226 Difference]: Without dead ends: 9372 [2018-08-07 12:19:50,690 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 283 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-08-07 12:19:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2018-08-07 12:19:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 9372. [2018-08-07 12:19:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9372 states. [2018-08-07 12:19:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9372 states to 9372 states and 14264 transitions. [2018-08-07 12:19:50,936 INFO L78 Accepts]: Start accepts. Automaton has 9372 states and 14264 transitions. Word has length 142 [2018-08-07 12:19:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:19:50,936 INFO L480 AbstractCegarLoop]: Abstraction has 9372 states and 14264 transitions. [2018-08-07 12:19:50,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:19:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 9372 states and 14264 transitions. [2018-08-07 12:19:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-08-07 12:19:50,944 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:19:50,944 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, 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] [2018-08-07 12:19:50,944 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 12:19:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash 160215914, now seen corresponding path program 1 times [2018-08-07 12:19:50,945 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:19:50,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:50,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:50,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:50,946 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:19:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:51,253 WARN L170 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:19:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:19:51,651 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:19:51,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:19:51,651 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:19:51,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:19:51,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:19:51,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:19:51,655 INFO L87 Difference]: Start difference. First operand 9372 states and 14264 transitions. Second operand 6 states. [2018-08-07 12:19:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:19:59,733 INFO L93 Difference]: Finished difference Result 22197 states and 34900 transitions. [2018-08-07 12:19:59,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:19:59,734 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-08-07 12:19:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:19:59,793 INFO L225 Difference]: With dead ends: 22197 [2018-08-07 12:19:59,793 INFO L226 Difference]: Without dead ends: 12831 [2018-08-07 12:19:59,822 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:19:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2018-08-07 12:20:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 12726. [2018-08-07 12:20:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12726 states. [2018-08-07 12:20:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12726 states to 12726 states and 18844 transitions. [2018-08-07 12:20:00,157 INFO L78 Accepts]: Start accepts. Automaton has 12726 states and 18844 transitions. Word has length 180 [2018-08-07 12:20:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:20:00,158 INFO L480 AbstractCegarLoop]: Abstraction has 12726 states and 18844 transitions. [2018-08-07 12:20:00,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:20:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12726 states and 18844 transitions. [2018-08-07 12:20:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-08-07 12:20:00,168 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:20:00,168 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:20:00,169 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 12:20:00,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1309475923, now seen corresponding path program 1 times [2018-08-07 12:20:00,169 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:20:00,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:00,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:00,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:00,172 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:20:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:00,457 WARN L170 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:20:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 118 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:20:00,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:20:00,699 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 12:20:00,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:00,718 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:20:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:00,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:20:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-08-07 12:20:01,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:20:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 118 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:20:01,315 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:20:01,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2018-08-07 12:20:01,316 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:20:01,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:20:01,317 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:20:01,317 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:20:01,317 INFO L87 Difference]: Start difference. First operand 12726 states and 18844 transitions. Second operand 5 states. [2018-08-07 12:20:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:20:12,741 INFO L93 Difference]: Finished difference Result 28984 states and 44302 transitions. [2018-08-07 12:20:12,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:20:12,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2018-08-07 12:20:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:20:12,811 INFO L225 Difference]: With dead ends: 28984 [2018-08-07 12:20:12,811 INFO L226 Difference]: Without dead ends: 16264 [2018-08-07 12:20:12,847 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:20:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16264 states. [2018-08-07 12:20:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16264 to 16161. [2018-08-07 12:20:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16161 states. [2018-08-07 12:20:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16161 states to 16161 states and 22330 transitions. [2018-08-07 12:20:13,200 INFO L78 Accepts]: Start accepts. Automaton has 16161 states and 22330 transitions. Word has length 215 [2018-08-07 12:20:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:20:13,201 INFO L480 AbstractCegarLoop]: Abstraction has 16161 states and 22330 transitions. [2018-08-07 12:20:13,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:20:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16161 states and 22330 transitions. [2018-08-07 12:20:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-08-07 12:20:13,225 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:20:13,226 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:13,227 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 12:20:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash 215043252, now seen corresponding path program 1 times [2018-08-07 12:20:13,227 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:20:13,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:13,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:13,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:13,229 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:20:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 118 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:20:13,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:20:13,660 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:20:13,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:13,675 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:20:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:13,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:20:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-08-07 12:20:13,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:20:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 118 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:20:14,377 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:20:14,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2018-08-07 12:20:14,377 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:20:14,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:20:14,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:20:14,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:20:14,380 INFO L87 Difference]: Start difference. First operand 16161 states and 22330 transitions. Second operand 5 states. [2018-08-07 12:20:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:20:26,987 INFO L93 Difference]: Finished difference Result 42746 states and 60593 transitions. [2018-08-07 12:20:26,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:20:26,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 284 [2018-08-07 12:20:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:20:27,091 INFO L225 Difference]: With dead ends: 42746 [2018-08-07 12:20:27,091 INFO L226 Difference]: Without dead ends: 26591 [2018-08-07 12:20:27,133 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 566 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:20:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26591 states. [2018-08-07 12:20:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26591 to 26309. [2018-08-07 12:20:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26309 states. [2018-08-07 12:20:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26309 states to 26309 states and 35949 transitions. [2018-08-07 12:20:27,635 INFO L78 Accepts]: Start accepts. Automaton has 26309 states and 35949 transitions. Word has length 284 [2018-08-07 12:20:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:20:27,636 INFO L480 AbstractCegarLoop]: Abstraction has 26309 states and 35949 transitions. [2018-08-07 12:20:27,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:20:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26309 states and 35949 transitions. [2018-08-07 12:20:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-08-07 12:20:27,665 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:20:27,665 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:27,665 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 12:20:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash -990524860, now seen corresponding path program 1 times [2018-08-07 12:20:27,666 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:20:27,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:27,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:27,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:20:27,667 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:20:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:20:28,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:20:28,233 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 12:20:28,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:28,249 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:20:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:28,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:20:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:20:28,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:20:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:20:29,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:20:29,149 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 12:20:29,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:20:29,418 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:20:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:20:29,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:20:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:20:29,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:20:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:20:29,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:20:29,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-08-07 12:20:29,889 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:20:29,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:20:29,890 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:20:29,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:20:29,891 INFO L87 Difference]: Start difference. First operand 26309 states and 35949 transitions. Second operand 9 states. [2018-08-07 12:21:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:21:00,821 INFO L93 Difference]: Finished difference Result 74545 states and 125601 transitions. [2018-08-07 12:21:00,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-08-07 12:21:00,821 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 292 [2018-08-07 12:21:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:21:01,104 INFO L225 Difference]: With dead ends: 74545 [2018-08-07 12:21:01,104 INFO L226 Difference]: Without dead ends: 48242 [2018-08-07 12:21:01,264 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1253 GetRequests, 1195 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=646, Invalid=2776, Unknown=0, NotChecked=0, Total=3422 [2018-08-07 12:21:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48242 states. [2018-08-07 12:21:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48242 to 47350. [2018-08-07 12:21:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47350 states. [2018-08-07 12:21:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47350 states to 47350 states and 60027 transitions. [2018-08-07 12:21:02,810 INFO L78 Accepts]: Start accepts. Automaton has 47350 states and 60027 transitions. Word has length 292 [2018-08-07 12:21:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:21:02,810 INFO L480 AbstractCegarLoop]: Abstraction has 47350 states and 60027 transitions. [2018-08-07 12:21:02,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:21:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 47350 states and 60027 transitions. [2018-08-07 12:21:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-08-07 12:21:02,844 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:21:02,845 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:21:02,845 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 12:21:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash -426312497, now seen corresponding path program 1 times [2018-08-07 12:21:02,846 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:21:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:02,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:02,847 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:21:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-08-07 12:21:03,185 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:21:03,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-08-07 12:21:03,185 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:21:03,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:21:03,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:21:03,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-08-07 12:21:03,186 INFO L87 Difference]: Start difference. First operand 47350 states and 60027 transitions. Second operand 5 states. [2018-08-07 12:21:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:21:12,019 INFO L93 Difference]: Finished difference Result 139817 states and 183697 transitions. [2018-08-07 12:21:12,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 12:21:12,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 293 [2018-08-07 12:21:12,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:21:12,808 INFO L225 Difference]: With dead ends: 139817 [2018-08-07 12:21:12,809 INFO L226 Difference]: Without dead ends: 92473 [2018-08-07 12:21:12,901 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:21:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92473 states. [2018-08-07 12:21:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92473 to 91954. [2018-08-07 12:21:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91954 states. [2018-08-07 12:21:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91954 states to 91954 states and 111649 transitions. [2018-08-07 12:21:14,520 INFO L78 Accepts]: Start accepts. Automaton has 91954 states and 111649 transitions. Word has length 293 [2018-08-07 12:21:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:21:14,521 INFO L480 AbstractCegarLoop]: Abstraction has 91954 states and 111649 transitions. [2018-08-07 12:21:14,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:21:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 91954 states and 111649 transitions. [2018-08-07 12:21:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-08-07 12:21:14,543 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:21:14,544 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:21:14,544 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 12:21:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1929029435, now seen corresponding path program 1 times [2018-08-07 12:21:14,545 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:21:14,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:14,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:14,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:14,546 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:21:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:14,965 WARN L170 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-08-07 12:21:15,161 WARN L170 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-08-07 12:21:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 158 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:21:15,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:21:15,899 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 12:21:15,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:15,906 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:21:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:16,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:21:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-08-07 12:21:16,206 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:21:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 118 proven. 97 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:21:17,510 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:21:17,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-08-07 12:21:17,510 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:21:17,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:21:17,511 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:21:17,511 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:21:17,511 INFO L87 Difference]: Start difference. First operand 91954 states and 111649 transitions. Second operand 5 states. [2018-08-07 12:21:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:21:30,327 INFO L93 Difference]: Finished difference Result 199293 states and 237132 transitions. [2018-08-07 12:21:30,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-08-07 12:21:30,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2018-08-07 12:21:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:21:30,627 INFO L225 Difference]: With dead ends: 199293 [2018-08-07 12:21:30,627 INFO L226 Difference]: Without dead ends: 107345 [2018-08-07 12:21:30,817 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 631 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-08-07 12:21:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107345 states. [2018-08-07 12:21:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107345 to 106939. [2018-08-07 12:21:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106939 states. [2018-08-07 12:21:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106939 states to 106939 states and 123924 transitions. [2018-08-07 12:21:33,081 INFO L78 Accepts]: Start accepts. Automaton has 106939 states and 123924 transitions. Word has length 317 [2018-08-07 12:21:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:21:33,081 INFO L480 AbstractCegarLoop]: Abstraction has 106939 states and 123924 transitions. [2018-08-07 12:21:33,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:21:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 106939 states and 123924 transitions. [2018-08-07 12:21:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-08-07 12:21:33,104 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:21:33,105 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, 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, 2, 2, 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] [2018-08-07 12:21:33,105 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 12:21:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2053608711, now seen corresponding path program 1 times [2018-08-07 12:21:33,106 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:21:33,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:33,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:33,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:21:33,107 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:21:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:33,626 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:21:33,821 WARN L170 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:21:34,051 WARN L170 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:21:34,436 WARN L170 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-08-07 12:21:35,016 WARN L170 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-08-07 12:21:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 256 proven. 170 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:21:35,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:21:35,663 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 12:21:35,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:35,670 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:21:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:35,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:21:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 332 proven. 39 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-08-07 12:21:36,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:21:36,457 WARN L170 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-08-07 12:21:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 187 proven. 239 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:21:37,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:21:37,913 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 12:21:37,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:21:37,931 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:21:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:21:38,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:21:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 332 proven. 39 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-08-07 12:21:38,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:21:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 187 proven. 239 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:21:39,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:21:39,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9, 9, 9] total 21 [2018-08-07 12:21:39,247 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:21:39,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-08-07 12:21:39,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-08-07 12:21:39,248 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2018-08-07 12:21:39,248 INFO L87 Difference]: Start difference. First operand 106939 states and 123924 transitions. Second operand 16 states. [2018-08-07 12:22:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:22:33,251 INFO L93 Difference]: Finished difference Result 231702 states and 268050 transitions. [2018-08-07 12:22:33,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-08-07 12:22:33,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 393 [2018-08-07 12:22:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:22:33,577 INFO L225 Difference]: With dead ends: 231702 [2018-08-07 12:22:33,577 INFO L226 Difference]: Without dead ends: 123664 [2018-08-07 12:22:33,708 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1649 GetRequests, 1591 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=709, Invalid=2153, Unknown=0, NotChecked=0, Total=2862 [2018-08-07 12:22:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123664 states. [2018-08-07 12:22:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123664 to 122521. [2018-08-07 12:22:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122521 states. [2018-08-07 12:22:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122521 states to 122521 states and 139454 transitions. [2018-08-07 12:22:37,038 INFO L78 Accepts]: Start accepts. Automaton has 122521 states and 139454 transitions. Word has length 393 [2018-08-07 12:22:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:22:37,038 INFO L480 AbstractCegarLoop]: Abstraction has 122521 states and 139454 transitions. [2018-08-07 12:22:37,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-08-07 12:22:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 122521 states and 139454 transitions. [2018-08-07 12:22:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-08-07 12:22:37,064 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:22:37,064 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, 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, 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 12:22:37,064 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 12:22:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash 788458982, now seen corresponding path program 1 times [2018-08-07 12:22:37,065 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:22:37,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:37,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:37,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:22:37,066 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:22:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 374 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-08-07 12:22:37,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:22:37,736 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 12:22:37,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:22:37,753 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:22:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:22:37,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-08-07 12:22:38,000 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-08-07 12:22:38,201 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:22:38,201 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:22:38,206 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:22:38,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:22:38 BoogieIcfgContainer [2018-08-07 12:22:38,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:22:38,207 INFO L168 Benchmark]: Toolchain (without parser) took 229668.58 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -516.3 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-08-07 12:22:38,208 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:22:38,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2415.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:22:38,209 INFO L168 Benchmark]: Boogie Procedure Inliner took 292.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:22:38,210 INFO L168 Benchmark]: Boogie Preprocessor took 935.62 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 878.7 MB). Free memory was 1.1 GB in the beginning and 2.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:22:38,211 INFO L168 Benchmark]: RCFGBuilder took 13871.96 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 173.5 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -158.6 MB). Peak memory consumption was 766.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:22:38,212 INFO L168 Benchmark]: TraceAbstraction took 212147.51 ms. Allocated memory was 2.5 GB in the beginning and 3.6 GB in the end (delta: 1.0 GB). Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 511.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-08-07 12:22:38,217 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2415.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 292.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 935.62 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 878.7 MB). Free memory was 1.1 GB in the beginning and 2.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13871.96 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 173.5 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -158.6 MB). Peak memory consumption was 766.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212147.51 ms. Allocated memory was 2.5 GB in the beginning and 3.6 GB in the end (delta: 1.0 GB). Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 511.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 189]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 189). Cancelled while BasicCegarLoop was analyzing trace of length 433 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 212.0s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 183.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1593 SDtfs, 41879 SDslu, 2846 SDs, 0 SdLazy, 84892 SolverSat, 16274 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 151.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4893 GetRequests, 4701 SyntacticMatches, 22 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122521occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 10.4s AutomataMinimizationTime, 10 MinimizatonAttempts, 3482 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 4650 NumberOfCodeBlocks, 4650 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 6952 ConstructedInterpolants, 0 QuantifiedInterpolants, 14905261 SizeOfPredicates, 23 NumberOfNonLiveVariables, 4064 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 26 InterpolantComputations, 8 PerfectInterpolantSequences, 4152/5435 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-22-38-233.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_12-22-38-233.csv Completed graceful shutdown