java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label19_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:31:32,795 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:31:32,797 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:31:32,809 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:31:32,809 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:31:32,810 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:31:32,811 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:31:32,813 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:31:32,815 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:31:32,816 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:31:32,817 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:31:32,817 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:31:32,818 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:31:32,819 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:31:32,820 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:31:32,821 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:31:32,824 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:31:32,826 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:31:32,828 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:31:32,829 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:31:32,830 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:31:32,832 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:31:32,834 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:31:32,834 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:31:32,835 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:31:32,835 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:31:32,836 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:31:32,837 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:31:32,838 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:31:32,839 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:31:32,840 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:31:32,840 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:31:32,840 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:31:32,841 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:31:32,842 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:31:32,842 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:31:32,843 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 [2018-07-24 12:31:32,875 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:31:32,875 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:31:32,876 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:31:32,876 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:31:32,876 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:31:32,877 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:31:32,878 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:31:32,878 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:31:32,878 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:31:32,878 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:31:32,878 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:31:32,879 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:31:32,880 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:31:32,881 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:31:32,881 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:31:32,881 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:31:32,881 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:31:32,881 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:31:32,881 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:31:32,882 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:31:32,882 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:31:32,882 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:31:32,883 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:31:32,884 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:31:32,884 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:31:32,884 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:31:32,884 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:31:32,885 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:31:32,885 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:31:32,885 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:31:32,885 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:31:32,886 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:31:32,886 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:31:32,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:31:32,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:31:32,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:31:32,961 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:31:32,962 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:31:32,963 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label19_false-unreach-call.c [2018-07-24 12:31:33,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe6d6a576/2090f869fafc43078ed05b7cde19ae3d/FLAGea22fbded [2018-07-24 12:31:33,804 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:31:33,805 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label19_false-unreach-call.c [2018-07-24 12:31:33,834 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe6d6a576/2090f869fafc43078ed05b7cde19ae3d/FLAGea22fbded [2018-07-24 12:31:33,851 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe6d6a576/2090f869fafc43078ed05b7cde19ae3d [2018-07-24 12:31:33,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:31:33,865 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:31:33,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:31:33,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:31:33,874 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:31:33,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:31:33" (1/1) ... [2018-07-24 12:31:33,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3fd0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:33, skipping insertion in model container [2018-07-24 12:31:33,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:31:33" (1/1) ... [2018-07-24 12:31:34,214 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:31:35,010 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:31:35,028 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:31:35,669 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:31:35,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35 WrapperNode [2018-07-24 12:31:35,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:31:35,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:31:35,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:31:35,838 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:31:35,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:35,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:31:36,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:31:36,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:31:36,022 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:31:36,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... [2018-07-24 12:31:36,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:31:36,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:31:36,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:31:36,643 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:31:36,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:31:36,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:31:36,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:31:36,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:31:36,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:31:36,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:31:36,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:31:36,713 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:31:36,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:31:36,713 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output3 [2018-07-24 12:31:36,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output3 [2018-07-24 12:31:36,714 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:31:36,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:31:45,280 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:31:45,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:31:45 BoogieIcfgContainer [2018-07-24 12:31:45,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:31:45,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:31:45,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:31:45,290 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:31:45,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:31:33" (1/3) ... [2018-07-24 12:31:45,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2b96bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:31:45, skipping insertion in model container [2018-07-24 12:31:45,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:31:35" (2/3) ... [2018-07-24 12:31:45,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2b96bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:31:45, skipping insertion in model container [2018-07-24 12:31:45,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:31:45" (3/3) ... [2018-07-24 12:31:45,296 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label19_false-unreach-call.c [2018-07-24 12:31:45,306 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:31:45,315 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:31:45,376 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:31:45,376 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:31:45,377 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:31:45,377 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:31:45,377 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:31:45,377 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:31:45,377 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:31:45,377 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:31:45,378 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:31:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-07-24 12:31:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-24 12:31:45,419 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:45,420 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:31:45,421 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:31:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash -705253844, now seen corresponding path program 1 times [2018-07-24 12:31:45,429 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:45,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:45,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:45,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:45,477 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:31:45,787 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:31:45,788 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:31:45,788 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:31:45,794 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:31:45,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:31:45,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:31:45,813 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-07-24 12:31:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:31:52,737 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-07-24 12:31:52,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:31:52,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-07-24 12:31:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:31:52,788 INFO L225 Difference]: With dead ends: 2251 [2018-07-24 12:31:52,789 INFO L226 Difference]: Without dead ends: 1474 [2018-07-24 12:31:52,798 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:31:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-07-24 12:31:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-07-24 12:31:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-07-24 12:31:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2721 transitions. [2018-07-24 12:31:52,976 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2721 transitions. Word has length 16 [2018-07-24 12:31:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:31:52,976 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2721 transitions. [2018-07-24 12:31:52,977 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:31:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2721 transitions. [2018-07-24 12:31:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-24 12:31:52,982 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:31:52,983 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:31:52,983 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:31:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -301577834, now seen corresponding path program 1 times [2018-07-24 12:31:52,985 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:31:52,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:52,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:31:52,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:31:52,988 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:31:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:31:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:31:53,512 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:31:53,512 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:31:53,513 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:31:53,514 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:31:53,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:31:53,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:31:53,515 INFO L87 Difference]: Start difference. First operand 1474 states and 2721 transitions. Second operand 6 states. [2018-07-24 12:32:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:14,361 INFO L93 Difference]: Finished difference Result 5908 states and 11160 transitions. [2018-07-24 12:32:14,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 12:32:14,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2018-07-24 12:32:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:14,393 INFO L225 Difference]: With dead ends: 5908 [2018-07-24 12:32:14,394 INFO L226 Difference]: Without dead ends: 4440 [2018-07-24 12:32:14,406 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:32:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2018-07-24 12:32:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 4388. [2018-07-24 12:32:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4388 states. [2018-07-24 12:32:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 7148 transitions. [2018-07-24 12:32:14,568 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 7148 transitions. Word has length 88 [2018-07-24 12:32:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:14,569 INFO L471 AbstractCegarLoop]: Abstraction has 4388 states and 7148 transitions. [2018-07-24 12:32:14,569 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:32:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 7148 transitions. [2018-07-24 12:32:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-24 12:32:14,579 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:14,579 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:32:14,579 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:32:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash 403744447, now seen corresponding path program 1 times [2018-07-24 12:32:14,580 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:14,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:14,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:14,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:14,582 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:32:14,895 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:32:14,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:32:14,896 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:32:14,896 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:32:14,897 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:32:14,897 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:32:14,897 INFO L87 Difference]: Start difference. First operand 4388 states and 7148 transitions. Second operand 6 states. [2018-07-24 12:32:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:24,844 INFO L93 Difference]: Finished difference Result 17447 states and 29630 transitions. [2018-07-24 12:32:24,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:32:24,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2018-07-24 12:32:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:24,924 INFO L225 Difference]: With dead ends: 17447 [2018-07-24 12:32:24,924 INFO L226 Difference]: Without dead ends: 13065 [2018-07-24 12:32:24,961 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:32:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13065 states. [2018-07-24 12:32:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13065 to 12964. [2018-07-24 12:32:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12964 states. [2018-07-24 12:32:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 20062 transitions. [2018-07-24 12:32:25,302 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 20062 transitions. Word has length 111 [2018-07-24 12:32:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:25,303 INFO L471 AbstractCegarLoop]: Abstraction has 12964 states and 20062 transitions. [2018-07-24 12:32:25,303 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:32:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 20062 transitions. [2018-07-24 12:32:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-24 12:32:25,307 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:25,308 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:32:25,308 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:32:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2090232382, now seen corresponding path program 1 times [2018-07-24 12:32:25,308 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:25,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:25,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:25,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:25,310 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:32:25,557 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:32:25,557 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:32:25,557 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:32:25,558 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:32:25,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:32:25,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:32:25,559 INFO L87 Difference]: Start difference. First operand 12964 states and 20062 transitions. Second operand 6 states. [2018-07-24 12:32:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:34,290 INFO L93 Difference]: Finished difference Result 34984 states and 58787 transitions. [2018-07-24 12:32:34,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:32:34,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-07-24 12:32:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:34,409 INFO L225 Difference]: With dead ends: 34984 [2018-07-24 12:32:34,409 INFO L226 Difference]: Without dead ends: 22026 [2018-07-24 12:32:34,465 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:32:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22026 states. [2018-07-24 12:32:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22026 to 21857. [2018-07-24 12:32:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21857 states. [2018-07-24 12:32:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21857 states to 21857 states and 34271 transitions. [2018-07-24 12:32:35,064 INFO L78 Accepts]: Start accepts. Automaton has 21857 states and 34271 transitions. Word has length 146 [2018-07-24 12:32:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:35,065 INFO L471 AbstractCegarLoop]: Abstraction has 21857 states and 34271 transitions. [2018-07-24 12:32:35,065 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:32:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 21857 states and 34271 transitions. [2018-07-24 12:32:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-24 12:32:35,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:35,069 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:32:35,069 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:32:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1274301265, now seen corresponding path program 1 times [2018-07-24 12:32:35,070 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:35,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:35,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:35,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:35,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:32:35,579 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:35,579 INFO L191 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 [2018-07-24 12:32:35,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:35,596 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:35,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:32:36,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:36,221 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:32:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:32:36,890 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:32:36,891 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:32:36,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:36,919 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:32:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:32:37,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:32:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:32:37,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:32:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:32:37,610 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:32:37,611 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-07-24 12:32:37,611 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:32:37,614 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:32:37,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:32:37,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:32:37,615 INFO L87 Difference]: Start difference. First operand 21857 states and 34271 transitions. Second operand 9 states. [2018-07-24 12:32:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:32:57,151 INFO L93 Difference]: Finished difference Result 59539 states and 106929 transitions. [2018-07-24 12:32:57,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-24 12:32:57,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 195 [2018-07-24 12:32:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:32:57,452 INFO L225 Difference]: With dead ends: 59539 [2018-07-24 12:32:57,452 INFO L226 Difference]: Without dead ends: 37688 [2018-07-24 12:32:57,691 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 787 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=357, Invalid=1203, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 12:32:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37688 states. [2018-07-24 12:32:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37688 to 36477. [2018-07-24 12:32:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36477 states. [2018-07-24 12:32:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36477 states to 36477 states and 49294 transitions. [2018-07-24 12:32:59,493 INFO L78 Accepts]: Start accepts. Automaton has 36477 states and 49294 transitions. Word has length 195 [2018-07-24 12:32:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:32:59,493 INFO L471 AbstractCegarLoop]: Abstraction has 36477 states and 49294 transitions. [2018-07-24 12:32:59,495 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:32:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 36477 states and 49294 transitions. [2018-07-24 12:32:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-24 12:32:59,500 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:32:59,500 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:32:59,500 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:32:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1292433116, now seen corresponding path program 1 times [2018-07-24 12:32:59,501 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:32:59,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:59,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:32:59,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:32:59,502 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:32:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:33:00,022 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:00,022 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:33:00,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:00,038 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:00,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:33:00,538 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:33:01,166 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:01,166 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:33:01,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:01,182 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:01,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:33:01,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (5)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 12:33:01,829 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:33:01,829 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 12:33:01,830 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:33:01,830 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:33:01,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:33:01,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:33:01,839 INFO L87 Difference]: Start difference. First operand 36477 states and 49294 transitions. Second operand 9 states. [2018-07-24 12:33:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:33:16,609 INFO L93 Difference]: Finished difference Result 97959 states and 153741 transitions. [2018-07-24 12:33:16,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 12:33:16,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 222 [2018-07-24 12:33:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:33:17,175 INFO L225 Difference]: With dead ends: 97959 [2018-07-24 12:33:17,175 INFO L226 Difference]: Without dead ends: 59318 [2018-07-24 12:33:17,503 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 888 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-07-24 12:33:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59318 states. [2018-07-24 12:33:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59318 to 57471. [2018-07-24 12:33:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57471 states. [2018-07-24 12:33:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57471 states to 57471 states and 83494 transitions. [2018-07-24 12:33:19,741 INFO L78 Accepts]: Start accepts. Automaton has 57471 states and 83494 transitions. Word has length 222 [2018-07-24 12:33:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:33:19,742 INFO L471 AbstractCegarLoop]: Abstraction has 57471 states and 83494 transitions. [2018-07-24 12:33:19,742 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:33:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 57471 states and 83494 transitions. [2018-07-24 12:33:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-07-24 12:33:19,750 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:33:19,750 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:33:19,750 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:33:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1956465585, now seen corresponding path program 1 times [2018-07-24 12:33:19,751 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:33:19,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:19,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:19,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:19,752 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:33:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:33:20,109 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:20,109 INFO L191 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 [2018-07-24 12:33:20,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:20,119 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:20,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:33:20,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:33:20,611 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:33:20,611 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 12 [2018-07-24 12:33:20,611 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:33:20,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:33:20,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:33:20,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:33:20,612 INFO L87 Difference]: Start difference. First operand 57471 states and 83494 transitions. Second operand 5 states. [2018-07-24 12:33:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:33:27,791 INFO L93 Difference]: Finished difference Result 123372 states and 172069 transitions. [2018-07-24 12:33:27,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:33:27,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2018-07-24 12:33:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:33:28,211 INFO L225 Difference]: With dead ends: 123372 [2018-07-24 12:33:28,211 INFO L226 Difference]: Without dead ends: 63053 [2018-07-24 12:33:28,489 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 502 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:33:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63053 states. [2018-07-24 12:33:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63053 to 58027. [2018-07-24 12:33:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58027 states. [2018-07-24 12:33:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58027 states to 58027 states and 73958 transitions. [2018-07-24 12:33:29,820 INFO L78 Accepts]: Start accepts. Automaton has 58027 states and 73958 transitions. Word has length 253 [2018-07-24 12:33:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:33:29,820 INFO L471 AbstractCegarLoop]: Abstraction has 58027 states and 73958 transitions. [2018-07-24 12:33:29,820 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:33:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 58027 states and 73958 transitions. [2018-07-24 12:33:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-07-24 12:33:29,834 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:33:29,835 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:33:29,835 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:33:29,835 INFO L82 PathProgramCache]: Analyzing trace with hash 108147702, now seen corresponding path program 1 times [2018-07-24 12:33:29,836 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:33:29,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:29,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:29,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:29,837 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:33:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:30,269 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-07-24 12:33:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 131 proven. 212 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:33:30,418 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:30,419 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:33:31,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:31,187 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:31,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 12:33:31,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 12:33:31,593 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:33:31,593 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:33:31,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:31,611 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:33:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:31,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:33:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 12:33:31,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:33:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-07-24 12:33:32,308 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:33:32,309 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-07-24 12:33:32,309 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:33:32,310 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:33:32,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:33:32,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:33:32,310 INFO L87 Difference]: Start difference. First operand 58027 states and 73958 transitions. Second operand 13 states. [2018-07-24 12:33:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:33:53,170 INFO L93 Difference]: Finished difference Result 123481 states and 156215 transitions. [2018-07-24 12:33:53,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-24 12:33:53,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 376 [2018-07-24 12:33:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:33:53,361 INFO L225 Difference]: With dead ends: 123481 [2018-07-24 12:33:53,361 INFO L226 Difference]: Without dead ends: 57091 [2018-07-24 12:33:53,582 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1573 GetRequests, 1522 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 12:33:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57091 states. [2018-07-24 12:33:54,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57091 to 52644. [2018-07-24 12:33:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52644 states. [2018-07-24 12:33:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 61940 transitions. [2018-07-24 12:33:55,032 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 61940 transitions. Word has length 376 [2018-07-24 12:33:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:33:55,033 INFO L471 AbstractCegarLoop]: Abstraction has 52644 states and 61940 transitions. [2018-07-24 12:33:55,033 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:33:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 61940 transitions. [2018-07-24 12:33:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-07-24 12:33:55,046 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:33:55,046 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:33:55,047 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:33:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1714340495, now seen corresponding path program 1 times [2018-07-24 12:33:55,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:33:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:55,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:33:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:33:55,048 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:33:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:33:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-07-24 12:33:55,310 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:33:55,310 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:33:55,310 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:33:55,311 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:33:55,311 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:33:55,311 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:33:55,311 INFO L87 Difference]: Start difference. First operand 52644 states and 61940 transitions. Second operand 4 states. [2018-07-24 12:34:02,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:34:02,579 INFO L93 Difference]: Finished difference Result 129198 states and 153438 transitions. [2018-07-24 12:34:02,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:34:02,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2018-07-24 12:34:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:34:02,782 INFO L225 Difference]: With dead ends: 129198 [2018-07-24 12:34:02,782 INFO L226 Difference]: Without dead ends: 76560 [2018-07-24 12:34:02,877 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:34:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76560 states. [2018-07-24 12:34:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76560 to 71629. [2018-07-24 12:34:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71629 states. [2018-07-24 12:34:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71629 states to 71629 states and 82755 transitions. [2018-07-24 12:34:04,688 INFO L78 Accepts]: Start accepts. Automaton has 71629 states and 82755 transitions. Word has length 397 [2018-07-24 12:34:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:34:04,689 INFO L471 AbstractCegarLoop]: Abstraction has 71629 states and 82755 transitions. [2018-07-24 12:34:04,689 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:34:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 71629 states and 82755 transitions. [2018-07-24 12:34:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2018-07-24 12:34:04,716 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:34:04,717 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:34:04,717 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:34:04,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1452210013, now seen corresponding path program 1 times [2018-07-24 12:34:04,718 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:34:04,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:04,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:04,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:04,719 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:34:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 406 proven. 452 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-07-24 12:34:05,793 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:34:05,793 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:34:05,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:05,806 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:34:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:05,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:34:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-07-24 12:34:06,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:34:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-07-24 12:34:06,382 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:34:06,383 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [21] total 22 [2018-07-24 12:34:06,383 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:34:06,384 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:34:06,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:34:06,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:34:06,385 INFO L87 Difference]: Start difference. First operand 71629 states and 82755 transitions. Second operand 3 states. [2018-07-24 12:34:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:34:10,838 INFO L93 Difference]: Finished difference Result 141188 states and 163355 transitions. [2018-07-24 12:34:10,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:34:10,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2018-07-24 12:34:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:34:10,970 INFO L225 Difference]: With dead ends: 141188 [2018-07-24 12:34:10,970 INFO L226 Difference]: Without dead ends: 69565 [2018-07-24 12:34:11,036 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 1002 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:34:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69565 states. [2018-07-24 12:34:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69565 to 67422. [2018-07-24 12:34:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67422 states. [2018-07-24 12:34:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67422 states to 67422 states and 76496 transitions. [2018-07-24 12:34:11,929 INFO L78 Accepts]: Start accepts. Automaton has 67422 states and 76496 transitions. Word has length 501 [2018-07-24 12:34:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:34:11,930 INFO L471 AbstractCegarLoop]: Abstraction has 67422 states and 76496 transitions. [2018-07-24 12:34:11,930 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:34:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 67422 states and 76496 transitions. [2018-07-24 12:34:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2018-07-24 12:34:11,965 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:34:11,966 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:34:11,966 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:34:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1084678474, now seen corresponding path program 1 times [2018-07-24 12:34:11,966 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:34:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:11,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:11,967 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:34:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:12,548 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:34:13,126 WARN L169 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-07-24 12:34:13,399 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2018-07-24 12:34:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 364 proven. 122 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2018-07-24 12:34:14,067 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:34:14,067 INFO L191 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 [2018-07-24 12:34:14,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:14,076 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:34:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:14,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:34:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 12:34:14,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:34:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 12:34:15,374 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:34:15,374 INFO L191 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 [2018-07-24 12:34:15,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:15,390 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:34:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:15,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:34:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 12:34:16,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:34:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (11)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 12:34:16,752 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:34:16,753 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 19 [2018-07-24 12:34:16,753 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:34:16,754 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 12:34:16,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 12:34:16,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:34:16,755 INFO L87 Difference]: Start difference. First operand 67422 states and 76496 transitions. Second operand 12 states. [2018-07-24 12:34:18,714 WARN L169 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2018-07-24 12:34:21,945 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2018-07-24 12:34:22,187 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2018-07-24 12:34:22,623 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-07-24 12:34:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:34:39,223 INFO L93 Difference]: Finished difference Result 127467 states and 144268 transitions. [2018-07-24 12:34:39,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-24 12:34:39,226 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 634 [2018-07-24 12:34:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:34:39,350 INFO L225 Difference]: With dead ends: 127467 [2018-07-24 12:34:39,350 INFO L226 Difference]: Without dead ends: 47029 [2018-07-24 12:34:39,442 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2606 GetRequests, 2556 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=536, Invalid=2014, Unknown=0, NotChecked=0, Total=2550 [2018-07-24 12:34:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47029 states. [2018-07-24 12:34:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47029 to 42583. [2018-07-24 12:34:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42583 states. [2018-07-24 12:34:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42583 states to 42583 states and 45264 transitions. [2018-07-24 12:34:40,126 INFO L78 Accepts]: Start accepts. Automaton has 42583 states and 45264 transitions. Word has length 634 [2018-07-24 12:34:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:34:40,128 INFO L471 AbstractCegarLoop]: Abstraction has 42583 states and 45264 transitions. [2018-07-24 12:34:40,128 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 12:34:40,128 INFO L276 IsEmpty]: Start isEmpty. Operand 42583 states and 45264 transitions. [2018-07-24 12:34:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2018-07-24 12:34:40,153 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:34:40,153 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:34:40,154 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:34:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1555051234, now seen corresponding path program 1 times [2018-07-24 12:34:40,154 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:34:40,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:40,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:40,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:40,156 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:34:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 153 proven. 194 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:34:40,876 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:34:40,876 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:34:40,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:40,884 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:34:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:41,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:34:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 456 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:34:41,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:34:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 153 proven. 194 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:34:42,328 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:34:42,328 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:34:42,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:42,345 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:34:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:34:42,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:34:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 456 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 12:34:43,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:34:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 153 proven. 194 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:34:43,700 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:34:43,701 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-07-24 12:34:43,702 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:34:43,703 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:34:43,704 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:34:43,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:34:43,704 INFO L87 Difference]: Start difference. First operand 42583 states and 45264 transitions. Second operand 9 states. [2018-07-24 12:34:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:34:57,663 INFO L93 Difference]: Finished difference Result 116958 states and 128163 transitions. [2018-07-24 12:34:57,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 12:34:57,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 667 [2018-07-24 12:34:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:34:57,860 INFO L225 Difference]: With dead ends: 116958 [2018-07-24 12:34:57,860 INFO L226 Difference]: Without dead ends: 74381 [2018-07-24 12:34:57,926 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2690 GetRequests, 2666 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:34:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74381 states. [2018-07-24 12:34:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74381 to 73661. [2018-07-24 12:34:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73661 states. [2018-07-24 12:34:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73661 states to 73661 states and 80696 transitions. [2018-07-24 12:34:58,960 INFO L78 Accepts]: Start accepts. Automaton has 73661 states and 80696 transitions. Word has length 667 [2018-07-24 12:34:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:34:58,961 INFO L471 AbstractCegarLoop]: Abstraction has 73661 states and 80696 transitions. [2018-07-24 12:34:58,961 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:34:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 73661 states and 80696 transitions. [2018-07-24 12:34:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2018-07-24 12:34:58,983 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:34:58,984 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:34:58,984 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:34:58,985 INFO L82 PathProgramCache]: Analyzing trace with hash 810765371, now seen corresponding path program 1 times [2018-07-24 12:34:58,985 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:34:58,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:58,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:34:58,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:34:58,986 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:34:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:35:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 433 proven. 205 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:35:00,057 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:35:00,057 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:35:00,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:35:00,066 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:35:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:35:00,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:35:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 435 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 12:35:00,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:35:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 435 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 12:35:01,047 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:35:01,047 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:35:01,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:35:01,063 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:35:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:35:01,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:35:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 435 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 12:35:02,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:35:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 435 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 12:35:02,477 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:35:02,478 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-07-24 12:35:02,478 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:35:02,479 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:35:02,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:35:02,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:35:02,480 INFO L87 Difference]: Start difference. First operand 73661 states and 80696 transitions. Second operand 14 states. [2018-07-24 12:35:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:35:17,006 INFO L93 Difference]: Finished difference Result 150147 states and 164768 transitions. [2018-07-24 12:35:17,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-24 12:35:17,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 719 [2018-07-24 12:35:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:35:17,135 INFO L225 Difference]: With dead ends: 150147 [2018-07-24 12:35:17,136 INFO L226 Difference]: Without dead ends: 65390 [2018-07-24 12:35:17,230 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2963 GetRequests, 2904 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=633, Invalid=2229, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 12:35:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65390 states. Received shutdown request... [2018-07-24 12:35:17,582 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:35:17,586 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:35:17,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:35:17 BoogieIcfgContainer [2018-07-24 12:35:17,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:35:17,588 INFO L168 Benchmark]: Toolchain (without parser) took 223723.84 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 173.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-24 12:35:17,589 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:35:17,589 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1970.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 7.1 GB. [2018-07-24 12:35:17,590 INFO L168 Benchmark]: Boogie Procedure Inliner took 184.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:35:17,591 INFO L168 Benchmark]: Boogie Preprocessor took 620.47 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 847.2 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:35:17,592 INFO L168 Benchmark]: RCFGBuilder took 8638.80 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 552.1 MB). Peak memory consumption was 552.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:35:17,592 INFO L168 Benchmark]: TraceAbstraction took 212301.38 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.2 GB in the end (delta: 493.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-07-24 12:35:17,597 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1970.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 184.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 620.47 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 847.2 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8638.80 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 552.1 MB). Peak memory consumption was 552.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212301.38 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.2 GB in the end (delta: 493.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 36]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 36). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 212.2s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 175.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2673 SDtfs, 55456 SDslu, 3456 SDs, 0 SdLazy, 112995 SolverSat, 21991 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 133.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13152 GetRequests, 12840 SyntacticMatches, 33 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 11.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73661occurred in iteration=12, 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: 12.8s AutomataMinimizationTime, 13 MinimizatonAttempts, 25093 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 16.1s InterpolantComputationTime, 10705 NumberOfCodeBlocks, 10705 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 17044 ConstructedInterpolants, 0 QuantifiedInterpolants, 27105382 SizeOfPredicates, 5 NumberOfNonLiveVariables, 9741 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 41 InterpolantComputations, 8 PerfectInterpolantSequences, 15343/17152 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/Problem18_label19_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-35-17-610.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label19_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-35-17-610.csv Completed graceful shutdown