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/Problem06_label17_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:52:26,786 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:52:26,788 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:52:26,802 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:52:26,802 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:52:26,803 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:52:26,805 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:52:26,808 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:52:26,810 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:52:26,810 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:52:26,811 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:52:26,812 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:52:26,813 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:52:26,814 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:52:26,815 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:52:26,815 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:52:26,816 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:52:26,819 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:52:26,821 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:52:26,825 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:52:26,826 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:52:26,831 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:52:26,837 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:52:26,837 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:52:26,837 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:52:26,838 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:52:26,841 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:52:26,842 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:52:26,846 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:52:26,847 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:52:26,850 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:52:26,850 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:52:26,851 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:52:26,851 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:52:26,852 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:52:26,852 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:52:26,854 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 [2018-09-10 10:52:26,882 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:52:26,884 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:52:26,886 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:52:26,887 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:52:26,887 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:52:26,887 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:52:26,887 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:52:26,888 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:52:26,888 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:52:26,888 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:52:26,888 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:52:26,889 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:52:26,889 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:52:26,889 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:52:26,890 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:52:26,890 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:52:26,890 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:52:26,891 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:52:26,891 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:52:26,891 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:52:26,891 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:52:26,891 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:52:26,891 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:52:26,892 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:52:26,892 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:52:26,892 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:52:26,892 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:52:26,894 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:52:26,894 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:52:26,894 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:52:26,894 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:52:26,895 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:52:26,895 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:52:26,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:52:26,955 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:52:26,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:52:26,960 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:52:26,961 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:52:26,962 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label17_true-unreach-call.c [2018-09-10 10:52:27,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bebe8b5/6e5dae0ce580426d9f0c2e51ee296a0c/FLAGf7ed7205b [2018-09-10 10:52:27,961 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:52:27,962 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem06_label17_true-unreach-call.c [2018-09-10 10:52:28,016 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bebe8b5/6e5dae0ce580426d9f0c2e51ee296a0c/FLAGf7ed7205b [2018-09-10 10:52:28,035 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bebe8b5/6e5dae0ce580426d9f0c2e51ee296a0c [2018-09-10 10:52:28,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:52:28,053 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:52:28,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:52:28,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:52:28,065 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:52:28,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:52:28" (1/1) ... [2018-09-10 10:52:28,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478c561f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:28, skipping insertion in model container [2018-09-10 10:52:28,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:52:28" (1/1) ... [2018-09-10 10:52:28,595 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:52:30,372 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:52:30,396 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:52:31,629 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:52:31,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31 WrapperNode [2018-09-10 10:52:31,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:52:31,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:52:31,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:52:31,871 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:52:31,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:31,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:32,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:52:32,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:52:32,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:52:32,042 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:52:32,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:32,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:32,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:32,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:32,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:32,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:33,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (1/1) ... [2018-09-10 10:52:33,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:52:33,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:52:33,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:52:33,075 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:52:33,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (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 [2018-09-10 10:52:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:52:33,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:52:33,145 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_output5 [2018-09-10 10:52:33,146 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_output5 [2018-09-10 10:52:33,146 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 [2018-09-10 10:52:33,146 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 [2018-09-10 10:52:33,146 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 [2018-09-10 10:52:33,146 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 [2018-09-10 10:52:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:52:33,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:52:33,147 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 [2018-09-10 10:52:33,147 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 [2018-09-10 10:52:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:52:33,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:52:33,149 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 [2018-09-10 10:52:33,149 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 [2018-09-10 10:52:46,022 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:52:46,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:52:46 BoogieIcfgContainer [2018-09-10 10:52:46,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:52:46,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:52:46,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:52:46,028 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:52:46,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:52:28" (1/3) ... [2018-09-10 10:52:46,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477b7480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:52:46, skipping insertion in model container [2018-09-10 10:52:46,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:52:31" (2/3) ... [2018-09-10 10:52:46,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477b7480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:52:46, skipping insertion in model container [2018-09-10 10:52:46,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:52:46" (3/3) ... [2018-09-10 10:52:46,031 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem06_label17_true-unreach-call.c [2018-09-10 10:52:46,041 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:52:46,052 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:52:46,118 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:52:46,119 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:52:46,119 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:52:46,119 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:52:46,119 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:52:46,120 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:52:46,120 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:52:46,120 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:52:46,120 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:52:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states. [2018-09-10 10:52:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2018-09-10 10:52:46,252 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:52:46,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:52:46,256 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:52:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1451336507, now seen corresponding path program 1 times [2018-09-10 10:52:46,266 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:52:46,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:52:46,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:52:46,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:52:46,322 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:52:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:52:48,979 WARN L175 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:52:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:52:50,241 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:52:50,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:52:50,241 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:52:50,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:52:50,264 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:52:50,265 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:52:50,267 INFO L87 Difference]: Start difference. First operand 1316 states. Second operand 3 states. [2018-09-10 10:53:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:53:00,439 INFO L93 Difference]: Finished difference Result 3724 states and 6977 transitions. [2018-09-10 10:53:00,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:53:00,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 983 [2018-09-10 10:53:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:53:00,489 INFO L225 Difference]: With dead ends: 3724 [2018-09-10 10:53:00,490 INFO L226 Difference]: Without dead ends: 2406 [2018-09-10 10:53:00,502 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:53:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2018-09-10 10:53:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2367. [2018-09-10 10:53:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2367 states. [2018-09-10 10:53:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 4384 transitions. [2018-09-10 10:53:00,689 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 4384 transitions. Word has length 983 [2018-09-10 10:53:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:53:00,693 INFO L480 AbstractCegarLoop]: Abstraction has 2367 states and 4384 transitions. [2018-09-10 10:53:00,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:53:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 4384 transitions. [2018-09-10 10:53:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2018-09-10 10:53:00,741 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:53:00,742 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:53:00,742 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:53:00,743 INFO L82 PathProgramCache]: Analyzing trace with hash -780434863, now seen corresponding path program 1 times [2018-09-10 10:53:00,743 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:53:00,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:00,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:53:00,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:00,745 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:53:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:53:01,202 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:53:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:02,275 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:53:02,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 10:53:02,275 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:53:02,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:53:02,280 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:53:02,280 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 10:53:02,281 INFO L87 Difference]: Start difference. First operand 2367 states and 4384 transitions. Second operand 5 states. [2018-09-10 10:53:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:53:09,924 INFO L93 Difference]: Finished difference Result 7123 states and 13278 transitions. [2018-09-10 10:53:09,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:53:09,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 992 [2018-09-10 10:53:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:53:09,958 INFO L225 Difference]: With dead ends: 7123 [2018-09-10 10:53:09,958 INFO L226 Difference]: Without dead ends: 4762 [2018-09-10 10:53:09,967 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:53:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2018-09-10 10:53:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4696. [2018-09-10 10:53:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4696 states. [2018-09-10 10:53:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 8735 transitions. [2018-09-10 10:53:10,130 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 8735 transitions. Word has length 992 [2018-09-10 10:53:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:53:10,131 INFO L480 AbstractCegarLoop]: Abstraction has 4696 states and 8735 transitions. [2018-09-10 10:53:10,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:53:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 8735 transitions. [2018-09-10 10:53:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2018-09-10 10:53:10,161 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:53:10,162 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:53:10,163 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:53:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1262746837, now seen corresponding path program 1 times [2018-09-10 10:53:10,163 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:53:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:10,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:53:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:10,165 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:53:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:53:10,636 WARN L175 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:53:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:11,387 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:53:11,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:53:11,388 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:53:11,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:53:11,390 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:53:11,390 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:53:11,390 INFO L87 Difference]: Start difference. First operand 4696 states and 8735 transitions. Second operand 6 states. [2018-09-10 10:53:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:53:22,178 INFO L93 Difference]: Finished difference Result 13816 states and 26270 transitions. [2018-09-10 10:53:22,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:53:22,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 999 [2018-09-10 10:53:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:53:22,230 INFO L225 Difference]: With dead ends: 13816 [2018-09-10 10:53:22,231 INFO L226 Difference]: Without dead ends: 9126 [2018-09-10 10:53:22,244 INFO L604 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 [2018-09-10 10:53:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9126 states. [2018-09-10 10:53:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9126 to 8937. [2018-09-10 10:53:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8937 states. [2018-09-10 10:53:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8937 states to 8937 states and 15928 transitions. [2018-09-10 10:53:22,523 INFO L78 Accepts]: Start accepts. Automaton has 8937 states and 15928 transitions. Word has length 999 [2018-09-10 10:53:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:53:22,526 INFO L480 AbstractCegarLoop]: Abstraction has 8937 states and 15928 transitions. [2018-09-10 10:53:22,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:53:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8937 states and 15928 transitions. [2018-09-10 10:53:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2018-09-10 10:53:22,560 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:53:22,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:53:22,562 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:53:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2141107361, now seen corresponding path program 1 times [2018-09-10 10:53:22,562 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:53:22,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:22,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:53:22,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:22,564 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:53:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:53:23,829 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:53:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 10:53:25,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:53:25,432 INFO L197 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 [2018-09-10 10:53:25,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:53:25,442 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:53:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:53:26,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:53:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:27,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:53:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:28,546 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:53:28,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-09-10 10:53:28,547 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:53:28,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:53:28,548 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:53:28,548 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-10 10:53:28,549 INFO L87 Difference]: Start difference. First operand 8937 states and 15928 transitions. Second operand 3 states. [2018-09-10 10:53:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:53:36,525 INFO L93 Difference]: Finished difference Result 22100 states and 39399 transitions. [2018-09-10 10:53:36,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:53:36,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1009 [2018-09-10 10:53:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:53:36,589 INFO L225 Difference]: With dead ends: 22100 [2018-09-10 10:53:36,589 INFO L226 Difference]: Without dead ends: 13169 [2018-09-10 10:53:36,622 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2029 GetRequests, 2013 SyntacticMatches, 13 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-10 10:53:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13169 states. [2018-09-10 10:53:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13169 to 13135. [2018-09-10 10:53:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13135 states. [2018-09-10 10:53:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 21630 transitions. [2018-09-10 10:53:36,992 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 21630 transitions. Word has length 1009 [2018-09-10 10:53:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:53:36,994 INFO L480 AbstractCegarLoop]: Abstraction has 13135 states and 21630 transitions. [2018-09-10 10:53:36,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:53:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 21630 transitions. [2018-09-10 10:53:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1035 [2018-09-10 10:53:37,045 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:53:37,046 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:53:37,046 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:53:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash -341406583, now seen corresponding path program 1 times [2018-09-10 10:53:37,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:53:37,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:37,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:53:37,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:53:37,049 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:53:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:53:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:38,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:53:38,232 INFO L197 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 [2018-09-10 10:53:38,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:53:38,249 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:53:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:53:38,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:53:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:40,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:53:40,436 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:53:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:41,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:53:41,450 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:53:41,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:53:41,467 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:53:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:53:42,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:53:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:43,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:53:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:53:44,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:53:44,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-10 10:53:44,310 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:53:44,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:53:44,312 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:53:44,312 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:53:44,313 INFO L87 Difference]: Start difference. First operand 13135 states and 21630 transitions. Second operand 9 states. [2018-09-10 10:54:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:54:12,524 INFO L93 Difference]: Finished difference Result 56141 states and 113675 transitions. [2018-09-10 10:54:12,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-10 10:54:12,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1034 [2018-09-10 10:54:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:54:12,809 INFO L225 Difference]: With dead ends: 56141 [2018-09-10 10:54:12,810 INFO L226 Difference]: Without dead ends: 43012 [2018-09-10 10:54:12,896 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4194 GetRequests, 4143 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=457, Invalid=2195, Unknown=0, NotChecked=0, Total=2652 [2018-09-10 10:54:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43012 states. [2018-09-10 10:54:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43012 to 41288. [2018-09-10 10:54:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41288 states. [2018-09-10 10:54:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41288 states to 41288 states and 66378 transitions. [2018-09-10 10:54:14,453 INFO L78 Accepts]: Start accepts. Automaton has 41288 states and 66378 transitions. Word has length 1034 [2018-09-10 10:54:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:54:14,454 INFO L480 AbstractCegarLoop]: Abstraction has 41288 states and 66378 transitions. [2018-09-10 10:54:14,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:54:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 41288 states and 66378 transitions. [2018-09-10 10:54:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2018-09-10 10:54:14,603 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:54:14,604 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:54:14,604 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:54:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash 743125921, now seen corresponding path program 1 times [2018-09-10 10:54:14,605 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:54:14,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:54:14,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:14,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:54:14,609 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:54:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 82 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:54:17,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:54:17,159 INFO L197 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 [2018-09-10 10:54:17,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:17,168 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:54:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:17,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:54:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:54:19,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:54:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:54:20,092 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:54:20,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-10 10:54:20,092 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:54:20,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:54:20,094 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:54:20,094 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:54:20,094 INFO L87 Difference]: Start difference. First operand 41288 states and 66378 transitions. Second operand 3 states. [2018-09-10 10:54:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:54:28,529 INFO L93 Difference]: Finished difference Result 121303 states and 208437 transitions. [2018-09-10 10:54:28,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:54:28,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1077 [2018-09-10 10:54:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:54:28,993 INFO L225 Difference]: With dead ends: 121303 [2018-09-10 10:54:28,993 INFO L226 Difference]: Without dead ends: 80021 [2018-09-10 10:54:29,103 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2167 GetRequests, 2154 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:54:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80021 states. [2018-09-10 10:54:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80021 to 79906. [2018-09-10 10:54:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79906 states. [2018-09-10 10:54:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79906 states to 79906 states and 134476 transitions. [2018-09-10 10:54:31,285 INFO L78 Accepts]: Start accepts. Automaton has 79906 states and 134476 transitions. Word has length 1077 [2018-09-10 10:54:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:54:31,288 INFO L480 AbstractCegarLoop]: Abstraction has 79906 states and 134476 transitions. [2018-09-10 10:54:31,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:54:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 79906 states and 134476 transitions. [2018-09-10 10:54:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1103 [2018-09-10 10:54:31,605 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:54:31,606 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:54:31,606 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:54:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1523134719, now seen corresponding path program 1 times [2018-09-10 10:54:31,607 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:54:31,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:54:31,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:31,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:54:31,608 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:54:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:32,164 WARN L175 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:54:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 114 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-10 10:54:33,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:54:33,309 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:54:33,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:33,318 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:54:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:34,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:54:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-10 10:54:34,898 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:54:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 129 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-10 10:54:35,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:54:35,479 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:54:35,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:35,496 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:54:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:37,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:54:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:54:38,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:54:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 116 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:54:38,997 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-10 10:54:38,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 13 [2018-09-10 10:54:38,998 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:54:39,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:54:39,000 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:54:39,000 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:54:39,000 INFO L87 Difference]: Start difference. First operand 79906 states and 134476 transitions. Second operand 5 states. [2018-09-10 10:54:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:54:49,548 INFO L93 Difference]: Finished difference Result 163853 states and 287865 transitions. [2018-09-10 10:54:49,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:54:49,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1102 [2018-09-10 10:54:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:54:49,915 INFO L225 Difference]: With dead ends: 163853 [2018-09-10 10:54:49,916 INFO L226 Difference]: Without dead ends: 83953 [2018-09-10 10:54:50,098 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4416 GetRequests, 4397 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:54:50,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83953 states. [2018-09-10 10:54:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83953 to 83097. [2018-09-10 10:54:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83097 states. [2018-09-10 10:54:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83097 states to 83097 states and 127473 transitions. [2018-09-10 10:54:52,493 INFO L78 Accepts]: Start accepts. Automaton has 83097 states and 127473 transitions. Word has length 1102 [2018-09-10 10:54:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:54:52,493 INFO L480 AbstractCegarLoop]: Abstraction has 83097 states and 127473 transitions. [2018-09-10 10:54:52,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:54:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 83097 states and 127473 transitions. [2018-09-10 10:54:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1117 [2018-09-10 10:54:52,728 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:54:52,729 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:54:52,729 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:54:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1121059075, now seen corresponding path program 1 times [2018-09-10 10:54:52,730 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:54:52,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:54:52,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:52,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:54:52,731 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:54:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 162 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-10 10:54:54,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:54:54,205 INFO L197 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 [2018-09-10 10:54:54,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:54,212 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:54:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:54,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:54:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-10 10:54:55,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:54:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 162 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-10 10:54:56,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:54:56,805 INFO L197 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 [2018-09-10 10:54:56,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:54:56,821 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:54:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:54:58,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:54:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-10 10:54:59,556 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:55:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 162 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-10 10:55:00,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:55:00,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-10 10:55:00,170 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:55:00,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:55:00,172 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:55:00,172 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:55:00,172 INFO L87 Difference]: Start difference. First operand 83097 states and 127473 transitions. Second operand 9 states. [2018-09-10 10:55:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:55:28,550 INFO L93 Difference]: Finished difference Result 298559 states and 525574 transitions. [2018-09-10 10:55:28,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-10 10:55:28,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1116 [2018-09-10 10:55:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:55:29,480 INFO L225 Difference]: With dead ends: 298559 [2018-09-10 10:55:29,480 INFO L226 Difference]: Without dead ends: 215468 [2018-09-10 10:55:29,643 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4544 GetRequests, 4491 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=505, Invalid=2251, Unknown=0, NotChecked=0, Total=2756 [2018-09-10 10:55:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215468 states. [2018-09-10 10:55:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215468 to 213660. [2018-09-10 10:55:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213660 states. [2018-09-10 10:55:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213660 states to 213660 states and 329512 transitions. [2018-09-10 10:55:34,976 INFO L78 Accepts]: Start accepts. Automaton has 213660 states and 329512 transitions. Word has length 1116 [2018-09-10 10:55:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:55:34,976 INFO L480 AbstractCegarLoop]: Abstraction has 213660 states and 329512 transitions. [2018-09-10 10:55:34,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:55:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 213660 states and 329512 transitions. [2018-09-10 10:55:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1169 [2018-09-10 10:55:35,586 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:55:35,587 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:55:35,587 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:55:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash -522854094, now seen corresponding path program 1 times [2018-09-10 10:55:35,588 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:55:35,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:55:35,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:55:35,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:55:35,589 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:55:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:55:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 216 proven. 53 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-10 10:55:37,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:55:37,405 INFO L197 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 [2018-09-10 10:55:37,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:55:37,414 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:55:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:55:38,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:55:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-10 10:55:39,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:55:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 231 proven. 14 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 10:55:40,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:55:40,409 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:55:40,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:55:40,425 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:55:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:55:42,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:55:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-09-10 10:55:42,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:55:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 231 proven. 14 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 10:55:43,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:55:43,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 18 [2018-09-10 10:55:43,245 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:55:43,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-10 10:55:43,247 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-10 10:55:43,247 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:55:43,248 INFO L87 Difference]: Start difference. First operand 213660 states and 329512 transitions. Second operand 11 states. Received shutdown request... [2018-09-10 10:56:03,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-10 10:56:03,868 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:56:03,873 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:56:03,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:56:03 BoogieIcfgContainer [2018-09-10 10:56:03,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:56:03,874 INFO L168 Benchmark]: Toolchain (without parser) took 215825.68 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -902.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-10 10:56:03,875 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 10:56:03,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 3813.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 990.0 MB in the end (delta: 402.3 MB). Peak memory consumption was 402.3 MB. Max. memory is 7.1 GB. [2018-09-10 10:56:03,876 INFO L168 Benchmark]: Boogie Procedure Inliner took 170.40 ms. Allocated memory is still 1.5 GB. Free memory was 990.0 MB in the beginning and 979.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 10:56:03,877 INFO L168 Benchmark]: Boogie Preprocessor took 1032.97 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 903.9 MB). Free memory was 979.4 MB in the beginning and 2.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 143.1 MB. Max. memory is 7.1 GB. [2018-09-10 10:56:03,878 INFO L168 Benchmark]: RCFGBuilder took 12948.02 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 170.9 MB). Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 551.3 MB). Peak memory consumption was 728.6 MB. Max. memory is 7.1 GB. [2018-09-10 10:56:03,879 INFO L168 Benchmark]: TraceAbstraction took 197849.02 ms. Allocated memory was 2.6 GB in the beginning and 3.7 GB in the end (delta: 1.1 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -572.3 MB). Peak memory consumption was 572.8 MB. Max. memory is 7.1 GB. [2018-09-10 10:56:03,884 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 3813.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 990.0 MB in the end (delta: 402.3 MB). Peak memory consumption was 402.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 170.40 ms. Allocated memory is still 1.5 GB. Free memory was 990.0 MB in the beginning and 979.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 1032.97 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 903.9 MB). Free memory was 979.4 MB in the beginning and 2.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 143.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12948.02 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 170.9 MB). Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 551.3 MB). Peak memory consumption was 728.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 197849.02 ms. Allocated memory was 2.6 GB in the beginning and 3.7 GB in the end (delta: 1.1 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -572.3 MB). Peak memory consumption was 572.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 9396]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 9396). Cancelled while BasicCegarLoop was constructing difference of abstraction (213660states) and FLOYD_HOARE automaton (currently 48 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (94214 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 1316 locations, 1 error locations. TIMEOUT Result, 197.7s OverallTime, 9 OverallIterations, 6 TraceHistogramMax, 135.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8319 SDtfs, 44125 SDslu, 10454 SDs, 0 SdLazy, 70734 SolverSat, 22267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22139 GetRequests, 21902 SyntacticMatches, 41 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2519 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213660occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 12.4s AutomataMinimizationTime, 8 MinimizatonAttempts, 4831 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.9s SsaConstructionTime, 10.5s SatisfiabilityAnalysisTime, 26.6s InterpolantComputationTime, 20406 NumberOfCodeBlocks, 20406 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 31303 ConstructedInterpolants, 0 QuantifiedInterpolants, 56469569 SizeOfPredicates, 19 NumberOfNonLiveVariables, 25670 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 29 InterpolantComputations, 8 PerfectInterpolantSequences, 4020/4385 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/Problem06_label17_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-56-03-898.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem06_label17_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-56-03-898.csv Completed graceful shutdown