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/Problem15_label37_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:11:51,770 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:11:51,772 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:11:51,786 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:11:51,787 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:11:51,788 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:11:51,789 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:11:51,791 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:11:51,793 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:11:51,793 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:11:51,794 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:11:51,795 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:11:51,796 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:11:51,797 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:11:51,798 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:11:51,799 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:11:51,799 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:11:51,801 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:11:51,804 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:11:51,805 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:11:51,806 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:11:51,808 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:11:51,810 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-24 12:11:51,817 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:11:51,817 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:11:51,818 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:11:51,819 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:11:51,819 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 12:11:51,835 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:11:51,836 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:11:51,837 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:11:51,837 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:11:51,837 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:11:51,837 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:11:51,837 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:11:51,838 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:11:51,838 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:11:51,838 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:11:51,838 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:11:51,839 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:11:51,839 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:11:51,839 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:11:51,840 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:11:51,840 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:11:51,840 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:11:51,840 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:11:51,840 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:11:51,841 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:11:51,841 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:11:51,841 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:11:51,841 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:11:51,841 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:11:51,842 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:11:51,842 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:11:51,842 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:11:51,842 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:11:51,842 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:11:51,843 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:11:51,843 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:11:51,843 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:11:51,843 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:11:51,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:11:51,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:11:51,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:11:51,906 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:11:51,907 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:11:51,907 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label37_false-unreach-call.c [2018-07-24 12:11:52,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b32e536/dc56ea28c67b46f78ea5a1cd3a091dba/FLAG930512687 [2018-07-24 12:11:52,652 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:11:52,653 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label37_false-unreach-call.c [2018-07-24 12:11:52,674 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b32e536/dc56ea28c67b46f78ea5a1cd3a091dba/FLAG930512687 [2018-07-24 12:11:52,690 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b32e536/dc56ea28c67b46f78ea5a1cd3a091dba [2018-07-24 12:11:52,703 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:11:52,706 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:11:52,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:11:52,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:11:52,718 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:11:52,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:11:52" (1/1) ... [2018-07-24 12:11:52,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c3d150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:52, skipping insertion in model container [2018-07-24 12:11:52,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:11:52" (1/1) ... [2018-07-24 12:11:52,963 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:11:53,519 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:11:53,535 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:11:53,817 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:11:53,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53 WrapperNode [2018-07-24 12:11:53,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:11:53,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:11:53,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:11:53,943 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:11:53,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:11:54,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:11:54,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:11:54,183 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:11:54,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (1/1) ... [2018-07-24 12:11:54,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:11:54,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:11:54,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:11:54,857 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:11:54,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (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 12:11:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:11:54,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:11:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:11:54,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:11:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:11:54,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:11:54,929 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 12:11:54,929 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 12:11:54,929 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 12:11:54,930 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 12:12:02,988 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:12:02,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:12:02 BoogieIcfgContainer [2018-07-24 12:12:02,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:12:02,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:12:02,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:12:02,994 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:12:02,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:11:52" (1/3) ... [2018-07-24 12:12:02,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459a6921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:12:02, skipping insertion in model container [2018-07-24 12:12:02,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:11:53" (2/3) ... [2018-07-24 12:12:02,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459a6921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:12:02, skipping insertion in model container [2018-07-24 12:12:02,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:12:02" (3/3) ... [2018-07-24 12:12:03,000 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label37_false-unreach-call.c [2018-07-24 12:12:03,011 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:12:03,021 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:12:03,072 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:12:03,073 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:12:03,073 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:12:03,073 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:12:03,073 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:12:03,073 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:12:03,073 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:12:03,073 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:12:03,074 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:12:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 12:12:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-24 12:12:03,123 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:03,124 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:12:03,126 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 12:12:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1598042399, now seen corresponding path program 1 times [2018-07-24 12:12:03,135 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:03,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:03,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:03,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:03,189 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:03,594 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 12:12:03,597 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:12:03,598 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:12:03,598 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:03,604 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:12:03,619 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:12:03,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:12:03,623 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-07-24 12:12:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:14,733 INFO L93 Difference]: Finished difference Result 1510 states and 2773 transitions. [2018-07-24 12:12:14,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:12:14,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-07-24 12:12:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:14,763 INFO L225 Difference]: With dead ends: 1510 [2018-07-24 12:12:14,764 INFO L226 Difference]: Without dead ends: 1066 [2018-07-24 12:12:14,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:12:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2018-07-24 12:12:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2018-07-24 12:12:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2018-07-24 12:12:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1590 transitions. [2018-07-24 12:12:14,931 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1590 transitions. Word has length 27 [2018-07-24 12:12:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:14,932 INFO L471 AbstractCegarLoop]: Abstraction has 1064 states and 1590 transitions. [2018-07-24 12:12:14,932 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:12:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1590 transitions. [2018-07-24 12:12:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-24 12:12:14,941 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:14,942 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:12:14,942 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 12:12:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash 300702389, now seen corresponding path program 1 times [2018-07-24 12:12:14,943 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:14,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:14,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:14,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:14,946 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:15,277 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:12:15,277 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:12:15,277 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:15,280 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:12:15,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:12:15,281 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:12:15,281 INFO L87 Difference]: Start difference. First operand 1064 states and 1590 transitions. Second operand 4 states. [2018-07-24 12:12:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:22,524 INFO L93 Difference]: Finished difference Result 3981 states and 6113 transitions. [2018-07-24 12:12:22,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:12:22,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2018-07-24 12:12:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:22,547 INFO L225 Difference]: With dead ends: 3981 [2018-07-24 12:12:22,547 INFO L226 Difference]: Without dead ends: 2923 [2018-07-24 12:12:22,556 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:12:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2018-07-24 12:12:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2921. [2018-07-24 12:12:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2921 states. [2018-07-24 12:12:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 4008 transitions. [2018-07-24 12:12:22,656 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 4008 transitions. Word has length 97 [2018-07-24 12:12:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:22,656 INFO L471 AbstractCegarLoop]: Abstraction has 2921 states and 4008 transitions. [2018-07-24 12:12:22,657 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:12:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 4008 transitions. [2018-07-24 12:12:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-24 12:12:22,678 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:22,678 INFO L353 BasicCegarLoop]: trace histogram [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, 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 12:12:22,679 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 12:12:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2048815950, now seen corresponding path program 1 times [2018-07-24 12:12:22,679 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:22,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:22,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:22,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:22,681 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 41 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:12:23,262 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:23,262 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 12:12:23,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:23,284 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:23,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:12:23,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:12:24,388 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:12:24,388 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-07-24 12:12:24,389 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:24,389 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:12:24,390 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:12:24,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:12:24,390 INFO L87 Difference]: Start difference. First operand 2921 states and 4008 transitions. Second operand 5 states. [2018-07-24 12:12:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:30,209 INFO L93 Difference]: Finished difference Result 8359 states and 11682 transitions. [2018-07-24 12:12:30,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:12:30,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2018-07-24 12:12:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:30,249 INFO L225 Difference]: With dead ends: 8359 [2018-07-24 12:12:30,250 INFO L226 Difference]: Without dead ends: 5444 [2018-07-24 12:12:30,265 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 412 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:12:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2018-07-24 12:12:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 5444. [2018-07-24 12:12:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5444 states. [2018-07-24 12:12:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5444 states to 5444 states and 7074 transitions. [2018-07-24 12:12:30,427 INFO L78 Accepts]: Start accepts. Automaton has 5444 states and 7074 transitions. Word has length 207 [2018-07-24 12:12:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:30,429 INFO L471 AbstractCegarLoop]: Abstraction has 5444 states and 7074 transitions. [2018-07-24 12:12:30,430 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:12:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5444 states and 7074 transitions. [2018-07-24 12:12:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-07-24 12:12:30,449 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:30,450 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:12:30,450 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 12:12:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1851384055, now seen corresponding path program 1 times [2018-07-24 12:12:30,450 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:30,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:30,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:30,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:30,452 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 12:12:31,064 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:31,064 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:12:31,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:31,076 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:31,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 12:12:31,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 12:12:32,007 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:32,008 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:12:32,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:32,036 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:32,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 12:12:32,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 12:12:32,599 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:12:32,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 12:12:32,600 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:12:32,601 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:12:32,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:12:32,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:12:32,602 INFO L87 Difference]: Start difference. First operand 5444 states and 7074 transitions. Second operand 9 states. [2018-07-24 12:12:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:44,419 INFO L93 Difference]: Finished difference Result 16612 states and 23512 transitions. [2018-07-24 12:12:44,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-24 12:12:44,422 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 392 [2018-07-24 12:12:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:44,503 INFO L225 Difference]: With dead ends: 16612 [2018-07-24 12:12:44,504 INFO L226 Difference]: Without dead ends: 11174 [2018-07-24 12:12:44,584 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1602 GetRequests, 1576 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:12:44,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11174 states. [2018-07-24 12:12:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11174 to 10455. [2018-07-24 12:12:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10455 states. [2018-07-24 12:12:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10455 states to 10455 states and 13266 transitions. [2018-07-24 12:12:44,947 INFO L78 Accepts]: Start accepts. Automaton has 10455 states and 13266 transitions. Word has length 392 [2018-07-24 12:12:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:44,949 INFO L471 AbstractCegarLoop]: Abstraction has 10455 states and 13266 transitions. [2018-07-24 12:12:44,949 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:12:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10455 states and 13266 transitions. [2018-07-24 12:12:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-07-24 12:12:44,970 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:44,971 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:12:44,971 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 12:12:44,972 INFO L82 PathProgramCache]: Analyzing trace with hash -884887061, now seen corresponding path program 1 times [2018-07-24 12:12:44,972 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:44,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:44,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:44,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:44,973 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 148 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:12:45,368 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:45,368 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:12:45,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:45,376 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:45,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-07-24 12:12:45,852 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-07-24 12:12:45,974 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:12:45,974 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 7 [2018-07-24 12:12:45,974 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:45,975 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:12:45,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:12:45,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:12:45,979 INFO L87 Difference]: Start difference. First operand 10455 states and 13266 transitions. Second operand 3 states. [2018-07-24 12:12:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:51,765 INFO L93 Difference]: Finished difference Result 28119 states and 37832 transitions. [2018-07-24 12:12:51,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:12:51,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 398 [2018-07-24 12:12:51,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:51,884 INFO L225 Difference]: With dead ends: 28119 [2018-07-24 12:12:51,885 INFO L226 Difference]: Without dead ends: 17730 [2018-07-24 12:12:52,014 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 796 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:12:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17730 states. [2018-07-24 12:12:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17730 to 17405. [2018-07-24 12:12:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17405 states. [2018-07-24 12:12:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17405 states to 17405 states and 22758 transitions. [2018-07-24 12:12:52,590 INFO L78 Accepts]: Start accepts. Automaton has 17405 states and 22758 transitions. Word has length 398 [2018-07-24 12:12:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:52,591 INFO L471 AbstractCegarLoop]: Abstraction has 17405 states and 22758 transitions. [2018-07-24 12:12:52,591 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:12:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 17405 states and 22758 transitions. [2018-07-24 12:12:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-07-24 12:12:52,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:52,616 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:12:52,616 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 12:12:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1923471635, now seen corresponding path program 1 times [2018-07-24 12:12:52,616 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:52,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:52,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:52,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:52,617 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 148 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:12:53,510 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:53,510 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 12:12:53,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:53,525 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:53,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 12:12:54,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 148 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:12:54,404 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:12:54,405 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:12:54,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:54,420 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:12:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:54,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:12:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 12:12:54,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:12:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 148 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-07-24 12:12:55,597 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:12:55,598 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:12:55,598 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:12:55,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:12:55,600 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:12:55,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:12:55,601 INFO L87 Difference]: Start difference. First operand 17405 states and 22758 transitions. Second operand 9 states. [2018-07-24 12:13:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:05,577 INFO L93 Difference]: Finished difference Result 38950 states and 52612 transitions. [2018-07-24 12:13:05,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-24 12:13:05,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 398 [2018-07-24 12:13:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:05,681 INFO L225 Difference]: With dead ends: 38950 [2018-07-24 12:13:05,682 INFO L226 Difference]: Without dead ends: 21630 [2018-07-24 12:13:05,811 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1618 GetRequests, 1596 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:13:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21630 states. [2018-07-24 12:13:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21630 to 21444. [2018-07-24 12:13:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21444 states. [2018-07-24 12:13:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21444 states to 21444 states and 26376 transitions. [2018-07-24 12:13:06,360 INFO L78 Accepts]: Start accepts. Automaton has 21444 states and 26376 transitions. Word has length 398 [2018-07-24 12:13:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:06,361 INFO L471 AbstractCegarLoop]: Abstraction has 21444 states and 26376 transitions. [2018-07-24 12:13:06,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:13:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21444 states and 26376 transitions. [2018-07-24 12:13:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2018-07-24 12:13:06,387 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:06,387 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:13:06,388 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 12:13:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1837300945, now seen corresponding path program 1 times [2018-07-24 12:13:06,388 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:06,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:06,389 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-07-24 12:13:06,957 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:13:06,957 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:13:06,958 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:06,959 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:13:06,959 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:13:06,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:13:06,960 INFO L87 Difference]: Start difference. First operand 21444 states and 26376 transitions. Second operand 3 states. [2018-07-24 12:13:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:13,866 INFO L93 Difference]: Finished difference Result 43116 states and 53377 transitions. [2018-07-24 12:13:13,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:13:13,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2018-07-24 12:13:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:13,954 INFO L225 Difference]: With dead ends: 43116 [2018-07-24 12:13:13,954 INFO L226 Difference]: Without dead ends: 21757 [2018-07-24 12:13:14,034 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:13:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21757 states. [2018-07-24 12:13:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21757 to 21444. [2018-07-24 12:13:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21444 states. [2018-07-24 12:13:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21444 states to 21444 states and 26377 transitions. [2018-07-24 12:13:14,504 INFO L78 Accepts]: Start accepts. Automaton has 21444 states and 26377 transitions. Word has length 469 [2018-07-24 12:13:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:14,505 INFO L471 AbstractCegarLoop]: Abstraction has 21444 states and 26377 transitions. [2018-07-24 12:13:14,505 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:13:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21444 states and 26377 transitions. [2018-07-24 12:13:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2018-07-24 12:13:14,538 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:14,538 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:13:14,538 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 12:13:14,539 INFO L82 PathProgramCache]: Analyzing trace with hash 649136381, now seen corresponding path program 1 times [2018-07-24 12:13:14,539 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:14,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:14,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:14,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:14,541 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 62 proven. 15 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-07-24 12:13:15,716 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:15,716 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:13:15,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:15,724 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:15,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-24 12:13:16,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 60 proven. 199 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 12:13:17,810 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:13:17,811 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-07-24 12:13:17,811 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:17,812 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:13:17,812 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:13:17,812 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:13:17,812 INFO L87 Difference]: Start difference. First operand 21444 states and 26377 transitions. Second operand 5 states. [2018-07-24 12:13:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:30,805 INFO L93 Difference]: Finished difference Result 46578 states and 58224 transitions. [2018-07-24 12:13:30,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:13:30,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2018-07-24 12:13:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:30,905 INFO L225 Difference]: With dead ends: 46578 [2018-07-24 12:13:30,905 INFO L226 Difference]: Without dead ends: 25145 [2018-07-24 12:13:30,976 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 977 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:13:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25145 states. [2018-07-24 12:13:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25145 to 24519. [2018-07-24 12:13:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24519 states. [2018-07-24 12:13:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24519 states to 24519 states and 29973 transitions. [2018-07-24 12:13:31,438 INFO L78 Accepts]: Start accepts. Automaton has 24519 states and 29973 transitions. Word has length 490 [2018-07-24 12:13:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:31,438 INFO L471 AbstractCegarLoop]: Abstraction has 24519 states and 29973 transitions. [2018-07-24 12:13:31,439 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:13:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 24519 states and 29973 transitions. [2018-07-24 12:13:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-07-24 12:13:31,461 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:31,462 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:13:31,462 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 12:13:31,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2035635639, now seen corresponding path program 1 times [2018-07-24 12:13:31,463 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:31,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:31,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:31,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:31,464 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 188 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 12:13:32,266 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:32,266 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 12:13:32,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:32,287 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:32,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 330 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 12:13:32,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 188 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 12:13:33,126 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:33,127 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:13:33,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:33,147 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:33,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 330 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 12:13:33,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 188 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 12:13:33,908 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:13:33,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:13:33,908 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:13:33,909 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:13:33,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:13:33,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:13:33,910 INFO L87 Difference]: Start difference. First operand 24519 states and 29973 transitions. Second operand 9 states. [2018-07-24 12:13:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:43,449 INFO L93 Difference]: Finished difference Result 50179 states and 62851 transitions. [2018-07-24 12:13:43,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 12:13:43,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 525 [2018-07-24 12:13:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:43,574 INFO L225 Difference]: With dead ends: 50179 [2018-07-24 12:13:43,574 INFO L226 Difference]: Without dead ends: 25993 [2018-07-24 12:13:43,688 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2130 GetRequests, 2106 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:13:43,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2018-07-24 12:13:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 25453. [2018-07-24 12:13:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25453 states. [2018-07-24 12:13:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25453 states to 25453 states and 30149 transitions. [2018-07-24 12:13:44,285 INFO L78 Accepts]: Start accepts. Automaton has 25453 states and 30149 transitions. Word has length 525 [2018-07-24 12:13:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:44,286 INFO L471 AbstractCegarLoop]: Abstraction has 25453 states and 30149 transitions. [2018-07-24 12:13:44,287 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:13:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 25453 states and 30149 transitions. [2018-07-24 12:13:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-07-24 12:13:44,317 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:44,317 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 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] [2018-07-24 12:13:44,317 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 12:13:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1299362855, now seen corresponding path program 1 times [2018-07-24 12:13:44,318 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:44,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:44,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:44,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:44,320 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 97 proven. 458 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 12:13:46,307 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:46,308 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:13:46,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:46,493 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:46,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 482 proven. 41 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-07-24 12:13:47,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 95 proven. 460 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 12:13:48,704 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:48,704 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 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:13:48,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:48,722 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:49,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 432 proven. 41 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-07-24 12:13:50,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 95 proven. 460 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 12:13:51,039 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:13:51,040 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9, 8, 9] total 23 [2018-07-24 12:13:51,040 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:13:51,041 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:13:51,041 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:13:51,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:13:51,042 INFO L87 Difference]: Start difference. First operand 25453 states and 30149 transitions. Second operand 13 states. [2018-07-24 12:14:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:12,505 INFO L93 Difference]: Finished difference Result 63426 states and 76907 transitions. [2018-07-24 12:14:12,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-24 12:14:12,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 586 [2018-07-24 12:14:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:12,646 INFO L225 Difference]: With dead ends: 63426 [2018-07-24 12:14:12,646 INFO L226 Difference]: Without dead ends: 36629 [2018-07-24 12:14:12,776 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2414 GetRequests, 2356 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 12:14:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36629 states. [2018-07-24 12:14:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36629 to 35967. [2018-07-24 12:14:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35967 states. [2018-07-24 12:14:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35967 states to 35967 states and 42782 transitions. [2018-07-24 12:14:13,614 INFO L78 Accepts]: Start accepts. Automaton has 35967 states and 42782 transitions. Word has length 586 [2018-07-24 12:14:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:13,614 INFO L471 AbstractCegarLoop]: Abstraction has 35967 states and 42782 transitions. [2018-07-24 12:14:13,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:14:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand 35967 states and 42782 transitions. [2018-07-24 12:14:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2018-07-24 12:14:13,653 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:13,654 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:14:13,654 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 12:14:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash 420659241, now seen corresponding path program 1 times [2018-07-24 12:14:13,655 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:13,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:13,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:13,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:13,658 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-07-24 12:14:14,496 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:14:14,496 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:14:14,496 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:14:14,496 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:14:14,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:14:14,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:14:14,497 INFO L87 Difference]: Start difference. First operand 35967 states and 42782 transitions. Second operand 4 states. [2018-07-24 12:14:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:19,054 INFO L93 Difference]: Finished difference Result 93112 states and 113377 transitions. [2018-07-24 12:14:19,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:14:19,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 589 [2018-07-24 12:14:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:19,215 INFO L225 Difference]: With dead ends: 93112 [2018-07-24 12:14:19,215 INFO L226 Difference]: Without dead ends: 39484 [2018-07-24 12:14:19,519 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:14:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39484 states. [2018-07-24 12:14:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39484 to 35620. [2018-07-24 12:14:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35620 states. [2018-07-24 12:14:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35620 states to 35620 states and 40628 transitions. [2018-07-24 12:14:20,279 INFO L78 Accepts]: Start accepts. Automaton has 35620 states and 40628 transitions. Word has length 589 [2018-07-24 12:14:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:20,280 INFO L471 AbstractCegarLoop]: Abstraction has 35620 states and 40628 transitions. [2018-07-24 12:14:20,280 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:14:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 35620 states and 40628 transitions. [2018-07-24 12:14:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2018-07-24 12:14:20,293 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:20,293 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:14:20,294 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 12:14:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash 247731744, now seen corresponding path program 1 times [2018-07-24 12:14:20,294 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:20,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:20,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:20,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:20,295 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-07-24 12:14:20,826 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:14:20,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:14:20,827 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:14:20,827 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:14:20,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:14:20,828 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:14:20,828 INFO L87 Difference]: Start difference. First operand 35620 states and 40628 transitions. Second operand 3 states. [2018-07-24 12:14:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:24,120 INFO L93 Difference]: Finished difference Result 74337 states and 85304 transitions. [2018-07-24 12:14:24,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:14:24,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 638 [2018-07-24 12:14:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:24,262 INFO L225 Difference]: With dead ends: 74337 [2018-07-24 12:14:24,262 INFO L226 Difference]: Without dead ends: 39199 [2018-07-24 12:14:24,418 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:14:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39199 states. [2018-07-24 12:14:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39199 to 38560. [2018-07-24 12:14:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38560 states. [2018-07-24 12:14:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38560 states to 38560 states and 43420 transitions. [2018-07-24 12:14:25,177 INFO L78 Accepts]: Start accepts. Automaton has 38560 states and 43420 transitions. Word has length 638 [2018-07-24 12:14:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:25,178 INFO L471 AbstractCegarLoop]: Abstraction has 38560 states and 43420 transitions. [2018-07-24 12:14:25,178 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:14:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 38560 states and 43420 transitions. [2018-07-24 12:14:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2018-07-24 12:14:25,192 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:25,193 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:14:25,193 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 12:14:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1370944625, now seen corresponding path program 1 times [2018-07-24 12:14:25,193 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:25,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:25,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:25,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:25,194 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 424 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:14:25,862 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:25,862 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:14:25,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:25,871 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:26,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:26,379 WARN L169 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 5 [2018-07-24 12:14:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2018-07-24 12:14:26,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2018-07-24 12:14:27,615 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:14:27,616 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 9 [2018-07-24 12:14:27,616 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:14:27,616 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:14:27,617 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:14:27,617 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:14:27,617 INFO L87 Difference]: Start difference. First operand 38560 states and 43420 transitions. Second operand 4 states. [2018-07-24 12:14:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:33,750 INFO L93 Difference]: Finished difference Result 95442 states and 108762 transitions. [2018-07-24 12:14:33,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:14:33,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 667 [2018-07-24 12:14:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:33,894 INFO L225 Difference]: With dead ends: 95442 [2018-07-24 12:14:33,894 INFO L226 Difference]: Without dead ends: 57364 [2018-07-24 12:14:34,004 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1339 GetRequests, 1331 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:14:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57364 states. [2018-07-24 12:14:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57364 to 55771. [2018-07-24 12:14:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55771 states. [2018-07-24 12:14:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55771 states to 55771 states and 62689 transitions. [2018-07-24 12:14:35,118 INFO L78 Accepts]: Start accepts. Automaton has 55771 states and 62689 transitions. Word has length 667 [2018-07-24 12:14:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:35,119 INFO L471 AbstractCegarLoop]: Abstraction has 55771 states and 62689 transitions. [2018-07-24 12:14:35,119 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:14:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 55771 states and 62689 transitions. [2018-07-24 12:14:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2018-07-24 12:14:35,146 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:35,147 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:14:35,147 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:14:35,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1364046192, now seen corresponding path program 1 times [2018-07-24 12:14:35,148 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:35,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:35,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:35,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:35,150 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-07-24 12:14:35,713 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:14:35,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:14:35,713 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:14:35,714 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:14:35,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:14:35,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:14:35,714 INFO L87 Difference]: Start difference. First operand 55771 states and 62689 transitions. Second operand 3 states. [2018-07-24 12:14:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:39,612 INFO L93 Difference]: Finished difference Result 110938 states and 125314 transitions. [2018-07-24 12:14:39,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:14:39,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 698 [2018-07-24 12:14:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:39,767 INFO L225 Difference]: With dead ends: 110938 [2018-07-24 12:14:39,767 INFO L226 Difference]: Without dead ends: 55649 [2018-07-24 12:14:39,937 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:14:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55649 states. [2018-07-24 12:14:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55649 to 52593. [2018-07-24 12:14:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52593 states. [2018-07-24 12:14:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52593 states to 52593 states and 58464 transitions. [2018-07-24 12:14:40,912 INFO L78 Accepts]: Start accepts. Automaton has 52593 states and 58464 transitions. Word has length 698 [2018-07-24 12:14:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:40,912 INFO L471 AbstractCegarLoop]: Abstraction has 52593 states and 58464 transitions. [2018-07-24 12:14:40,913 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:14:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 52593 states and 58464 transitions. [2018-07-24 12:14:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2018-07-24 12:14:40,960 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:40,961 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-07-24 12:14:40,961 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:14:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1431860544, now seen corresponding path program 1 times [2018-07-24 12:14:40,961 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:40,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:40,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:40,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:40,963 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked. [2018-07-24 12:14:41,719 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:41,720 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 12:14:41,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:41,731 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:42,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-07-24 12:14:42,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked. [2018-07-24 12:14:43,129 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:14:43,130 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-07-24 12:14:43,130 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:14:43,131 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:14:43,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:14:43,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:14:43,131 INFO L87 Difference]: Start difference. First operand 52593 states and 58464 transitions. Second operand 3 states. [2018-07-24 12:14:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:46,886 INFO L93 Difference]: Finished difference Result 110872 states and 123530 transitions. [2018-07-24 12:14:46,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:14:46,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 830 [2018-07-24 12:14:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:46,954 INFO L225 Difference]: With dead ends: 110872 [2018-07-24 12:14:46,954 INFO L226 Difference]: Without dead ends: 29731 [2018-07-24 12:14:47,127 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1662 GetRequests, 1661 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:14:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29731 states. [2018-07-24 12:14:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29731 to 23339. [2018-07-24 12:14:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23339 states. [2018-07-24 12:14:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23339 states to 23339 states and 25317 transitions. [2018-07-24 12:14:47,827 INFO L78 Accepts]: Start accepts. Automaton has 23339 states and 25317 transitions. Word has length 830 [2018-07-24 12:14:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:47,828 INFO L471 AbstractCegarLoop]: Abstraction has 23339 states and 25317 transitions. [2018-07-24 12:14:47,828 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:14:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23339 states and 25317 transitions. [2018-07-24 12:14:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2018-07-24 12:14:47,845 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:47,846 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 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] [2018-07-24 12:14:47,846 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:14:47,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1042664845, now seen corresponding path program 1 times [2018-07-24 12:14:47,847 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:47,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:47,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:47,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:47,847 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:48,820 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 12:14:49,047 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-07-24 12:14:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 93 proven. 794 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-07-24 12:14:51,416 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:51,416 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:14:51,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:51,426 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:51,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:15:07,202 WARN L169 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-07-24 12:15:08,183 WARN L1032 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_9 Int)) (let ((.cse0 (mod v_prenex_9 299926))) (and (= .cse0 0) (<= (+ v_prenex_9 44) 0) (<= .cse0 (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__a0~0 300074))))) (exists ((v_prenex_10 Int)) (let ((.cse1 (mod v_prenex_10 299926))) (and (<= .cse1 (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__a0~0 600000)) (< v_prenex_10 0) (<= (+ v_prenex_10 44) 0) (not (= .cse1 0)))))) is different from true [2018-07-24 12:15:14,314 WARN L169 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 39 [2018-07-24 12:15:14,661 WARN L169 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 23 [2018-07-24 12:15:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 491 trivial. 19 not checked. [2018-07-24 12:15:15,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:15:26,133 WARN L169 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-07-24 12:15:26,138 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:30,294 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:32,516 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:34,710 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:37,542 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:38,326 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:38,543 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:40,671 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:40,809 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:42,991 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:45,132 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:47,340 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-07-24 12:15:47,674 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 12 Received shutdown request... [2018-07-24 12:15:51,571 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 12:15:51,772 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:15:51,773 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:15:51,778 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:15:51,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:15:51 BoogieIcfgContainer [2018-07-24 12:15:51,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:15:51,779 INFO L168 Benchmark]: Toolchain (without parser) took 239075.58 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -614.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-07-24 12:15:51,780 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:15:51,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1234.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 127.0 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. [2018-07-24 12:15:51,781 INFO L168 Benchmark]: Boogie Procedure Inliner took 239.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:15:51,782 INFO L168 Benchmark]: Boogie Preprocessor took 673.90 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 895.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:15:51,783 INFO L168 Benchmark]: RCFGBuilder took 8133.18 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 321.9 MB). Peak memory consumption was 321.9 MB. Max. memory is 7.1 GB. [2018-07-24 12:15:51,784 INFO L168 Benchmark]: TraceAbstraction took 228788.00 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: -50.4 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-07-24 12:15:51,788 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1234.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 127.0 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 239.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 673.90 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 895.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8133.18 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 321.9 MB). Peak memory consumption was 321.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 228788.00 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: -50.4 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 67). Cancelled while BasicCegarLoop was analyzing trace of length 854 with TraceHistMax 5, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 228.7s OverallTime, 16 OverallIterations, 5 TraceHistogramMax, 127.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4869 SDtfs, 22133 SDslu, 3268 SDs, 0 SdLazy, 39303 SolverSat, 8452 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 104.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13010 GetRequests, 12829 SyntacticMatches, 20 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55771occurred in iteration=13, 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: 8.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 18919 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 19.8s InterpolantComputationTime, 13405 NumberOfCodeBlocks, 13405 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 19758 ConstructedInterpolants, 24 QuantifiedInterpolants, 38311749 SizeOfPredicates, 27 NumberOfNonLiveVariables, 9364 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 41 InterpolantComputations, 12 PerfectInterpolantSequences, 14988/17344 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/Problem15_label37_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-15-51-802.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label37_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-15-51-802.csv Completed graceful shutdown