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/Problem14_label19_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:27:06,085 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:27:06,087 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:27:06,099 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:27:06,099 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:27:06,100 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:27:06,102 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:27:06,103 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:27:06,105 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:27:06,106 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:27:06,107 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:27:06,107 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:27:06,108 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:27:06,109 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:27:06,110 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:27:06,111 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:27:06,112 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:27:06,114 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:27:06,116 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:27:06,117 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:27:06,118 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:27:06,120 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:27:06,122 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:27:06,122 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:27:06,123 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:27:06,123 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:27:06,124 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:27:06,125 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:27:06,126 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:27:06,127 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:27:06,128 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:27:06,128 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:27:06,129 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:27:06,129 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:27:06,130 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:27:06,130 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:27:06,131 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 14:27:06,163 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:27:06,163 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:27:06,164 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:27:06,167 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:27:06,168 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:27:06,168 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:27:06,168 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:27:06,168 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:27:06,168 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:27:06,169 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:27:06,169 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:27:06,171 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:27:06,171 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:27:06,171 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:27:06,171 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:27:06,172 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:27:06,172 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:27:06,172 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:27:06,172 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:27:06,174 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:27:06,174 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:27:06,174 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:27:06,175 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:27:06,175 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:27:06,175 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:27:06,175 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:27:06,175 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:27:06,176 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:27:06,176 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:27:06,176 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:27:06,176 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:27:06,176 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:27:06,176 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:27:06,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:27:06,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:27:06,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:27:06,270 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:27:06,271 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:27:06,271 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label19_true-unreach-call_false-termination.c [2018-07-24 14:27:06,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197e1098b/f900419cbeb34a0eb07920eca6810895/FLAGfd028bc9a [2018-07-24 14:27:06,935 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:27:06,936 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label19_true-unreach-call_false-termination.c [2018-07-24 14:27:06,958 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197e1098b/f900419cbeb34a0eb07920eca6810895/FLAGfd028bc9a [2018-07-24 14:27:06,980 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197e1098b/f900419cbeb34a0eb07920eca6810895 [2018-07-24 14:27:06,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:27:06,994 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:27:06,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:27:06,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:27:07,003 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:27:07,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:27:06" (1/1) ... [2018-07-24 14:27:07,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a79679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07, skipping insertion in model container [2018-07-24 14:27:07,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:27:06" (1/1) ... [2018-07-24 14:27:07,225 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:27:07,533 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:27:07,550 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:27:07,745 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:27:07,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07 WrapperNode [2018-07-24 14:27:07,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:27:07,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:27:07,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:27:07,804 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:27:07,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:07,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:07,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:27:07,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:27:07,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:27:07,932 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:27:07,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:07,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:07,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:07,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:08,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:08,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:08,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (1/1) ... [2018-07-24 14:27:08,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:27:08,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:27:08,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:27:08,273 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:27:08,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (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 14:27:08,350 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-24 14:27:08,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-24 14:27:08,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:27:08,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:27:08,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:27:08,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:27:08,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:27:08,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:27:12,122 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:27:12,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:27:12 BoogieIcfgContainer [2018-07-24 14:27:12,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:27:12,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:27:12,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:27:12,132 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:27:12,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:27:06" (1/3) ... [2018-07-24 14:27:12,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffd7865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:27:12, skipping insertion in model container [2018-07-24 14:27:12,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:27:07" (2/3) ... [2018-07-24 14:27:12,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffd7865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:27:12, skipping insertion in model container [2018-07-24 14:27:12,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:27:12" (3/3) ... [2018-07-24 14:27:12,137 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label19_true-unreach-call_false-termination.c [2018-07-24 14:27:12,153 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:27:12,162 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:27:12,222 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:27:12,223 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:27:12,223 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:27:12,223 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:27:12,224 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:27:12,224 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:27:12,224 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:27:12,224 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:27:12,225 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:27:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 14:27:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-24 14:27:12,276 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:12,278 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:12,278 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:12,283 INFO L82 PathProgramCache]: Analyzing trace with hash -989516953, now seen corresponding path program 1 times [2018-07-24 14:27:12,286 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:12,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:12,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:12,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:12,334 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:12,739 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 14:27:12,741 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:12,741 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:27:12,742 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:12,748 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:27:12,764 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:27:12,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:27:12,767 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-07-24 14:27:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:14,702 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-07-24 14:27:14,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:27:14,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2018-07-24 14:27:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:14,727 INFO L225 Difference]: With dead ends: 691 [2018-07-24 14:27:14,727 INFO L226 Difference]: Without dead ends: 434 [2018-07-24 14:27:14,734 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:27:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-07-24 14:27:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-07-24 14:27:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-24 14:27:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-07-24 14:27:14,837 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 69 [2018-07-24 14:27:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:14,838 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-07-24 14:27:14,838 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:27:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-07-24 14:27:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-24 14:27:14,847 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:14,848 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:27:14,848 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:14,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1933903417, now seen corresponding path program 1 times [2018-07-24 14:27:14,849 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:14,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:14,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:14,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:14,851 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:15,162 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:15,162 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:27:15,163 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:15,165 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:27:15,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:27:15,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:27:15,166 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-07-24 14:27:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:17,579 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-07-24 14:27:17,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:27:17,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2018-07-24 14:27:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:17,587 INFO L225 Difference]: With dead ends: 1062 [2018-07-24 14:27:17,587 INFO L226 Difference]: Without dead ends: 634 [2018-07-24 14:27:17,590 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:27:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-07-24 14:27:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-07-24 14:27:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-07-24 14:27:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-07-24 14:27:17,635 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 144 [2018-07-24 14:27:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:17,636 INFO L471 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-07-24 14:27:17,636 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:27:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-07-24 14:27:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-24 14:27:17,641 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:17,642 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 14:27:17,642 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 622486974, now seen corresponding path program 1 times [2018-07-24 14:27:17,642 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:17,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:17,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:17,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:17,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:17,917 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:27:17,918 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:27:17,918 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:17,919 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:27:17,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:27:17,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:27:17,920 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-07-24 14:27:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:21,801 INFO L93 Difference]: Finished difference Result 2348 states and 3999 transitions. [2018-07-24 14:27:21,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:27:21,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2018-07-24 14:27:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:21,816 INFO L225 Difference]: With dead ends: 2348 [2018-07-24 14:27:21,816 INFO L226 Difference]: Without dead ends: 1729 [2018-07-24 14:27:21,823 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:27:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2018-07-24 14:27:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1729. [2018-07-24 14:27:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1729 states. [2018-07-24 14:27:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2669 transitions. [2018-07-24 14:27:21,886 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2669 transitions. Word has length 153 [2018-07-24 14:27:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:21,886 INFO L471 AbstractCegarLoop]: Abstraction has 1729 states and 2669 transitions. [2018-07-24 14:27:21,886 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:27:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2669 transitions. [2018-07-24 14:27:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-07-24 14:27:21,897 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:21,897 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:21,898 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:21,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1813460485, now seen corresponding path program 1 times [2018-07-24 14:27:21,898 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:21,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:21,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:21,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:21,899 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:22,290 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-07-24 14:27:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:22,438 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:22,438 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 14:27:22,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:22,450 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:22,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:23,209 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:27:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-24 14:27:23,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:23,633 WARN L169 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:27:23,749 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:27:23,861 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 14:27:24,424 WARN L169 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:27:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:25,006 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:27:25,007 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:27:25,007 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:25,008 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:27:25,008 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:27:25,008 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:27:25,009 INFO L87 Difference]: Start difference. First operand 1729 states and 2669 transitions. Second operand 5 states. [2018-07-24 14:27:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:28,775 INFO L93 Difference]: Finished difference Result 4911 states and 7528 transitions. [2018-07-24 14:27:28,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:27:28,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 257 [2018-07-24 14:27:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:28,799 INFO L225 Difference]: With dead ends: 4911 [2018-07-24 14:27:28,800 INFO L226 Difference]: Without dead ends: 3188 [2018-07-24 14:27:28,811 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:27:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3188 states. [2018-07-24 14:27:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3188 to 3129. [2018-07-24 14:27:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2018-07-24 14:27:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4631 transitions. [2018-07-24 14:27:28,919 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4631 transitions. Word has length 257 [2018-07-24 14:27:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:28,920 INFO L471 AbstractCegarLoop]: Abstraction has 3129 states and 4631 transitions. [2018-07-24 14:27:28,920 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:27:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4631 transitions. [2018-07-24 14:27:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-07-24 14:27:28,937 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:28,937 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:28,937 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash 125353423, now seen corresponding path program 1 times [2018-07-24 14:27:28,938 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:28,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:28,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:28,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:28,940 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:29,449 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:27:29,644 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:27:29,871 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:27:30,207 WARN L169 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 14:27:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 274 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:30,711 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:30,711 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 14:27:30,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:30,718 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:30,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 305 proven. 53 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-24 14:27:31,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 220 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:32,154 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:32,155 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 14:27:32,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:32,172 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:32,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 305 proven. 53 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-07-24 14:27:32,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 220 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:27:33,694 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:27:33,694 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-07-24 14:27:33,694 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:27:33,695 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 14:27:33,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 14:27:33,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:27:33,696 INFO L87 Difference]: Start difference. First operand 3129 states and 4631 transitions. Second operand 15 states. [2018-07-24 14:27:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:39,784 INFO L93 Difference]: Finished difference Result 7978 states and 11983 transitions. [2018-07-24 14:27:39,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-24 14:27:39,785 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 342 [2018-07-24 14:27:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:39,808 INFO L225 Difference]: With dead ends: 7978 [2018-07-24 14:27:39,809 INFO L226 Difference]: Without dead ends: 4652 [2018-07-24 14:27:39,833 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1411 GetRequests, 1364 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=416, Invalid=1306, Unknown=0, NotChecked=0, Total=1722 [2018-07-24 14:27:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4652 states. [2018-07-24 14:27:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4652 to 4062. [2018-07-24 14:27:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4062 states. [2018-07-24 14:27:39,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 5306 transitions. [2018-07-24 14:27:39,942 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 5306 transitions. Word has length 342 [2018-07-24 14:27:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:39,943 INFO L471 AbstractCegarLoop]: Abstraction has 4062 states and 5306 transitions. [2018-07-24 14:27:39,943 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 14:27:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 5306 transitions. [2018-07-24 14:27:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-07-24 14:27:39,960 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:39,960 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:39,960 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:39,961 INFO L82 PathProgramCache]: Analyzing trace with hash 738199590, now seen corresponding path program 1 times [2018-07-24 14:27:39,961 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:39,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:39,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:39,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:39,962 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:40,850 WARN L169 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-07-24 14:27:41,063 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:27:41,668 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:27:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 301 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:27:42,179 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:42,179 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 14:27:42,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:42,187 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:42,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-07-24 14:27:42,542 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 186 proven. 175 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-07-24 14:27:42,911 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:27:42,912 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 15 [2018-07-24 14:27:42,912 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:27:42,912 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:27:42,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:27:42,913 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:27:42,913 INFO L87 Difference]: Start difference. First operand 4062 states and 5306 transitions. Second operand 5 states. [2018-07-24 14:27:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:45,424 INFO L93 Difference]: Finished difference Result 11086 states and 14748 transitions. [2018-07-24 14:27:45,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:27:45,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 367 [2018-07-24 14:27:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:45,456 INFO L225 Difference]: With dead ends: 11086 [2018-07-24 14:27:45,456 INFO L226 Difference]: Without dead ends: 7030 [2018-07-24 14:27:45,481 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 732 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:27:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2018-07-24 14:27:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6629. [2018-07-24 14:27:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6629 states. [2018-07-24 14:27:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 8247 transitions. [2018-07-24 14:27:45,660 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 8247 transitions. Word has length 367 [2018-07-24 14:27:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:45,661 INFO L471 AbstractCegarLoop]: Abstraction has 6629 states and 8247 transitions. [2018-07-24 14:27:45,661 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:27:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 8247 transitions. [2018-07-24 14:27:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-07-24 14:27:45,694 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:45,695 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:45,695 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash -421436786, now seen corresponding path program 1 times [2018-07-24 14:27:45,696 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:45,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:45,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:45,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:45,697 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:46,584 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:27:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 480 proven. 74 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-07-24 14:27:46,913 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:46,913 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 14:27:46,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:46,921 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:47,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-07-24 14:27:47,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 480 proven. 74 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-07-24 14:27:47,698 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:47,698 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 14:27:47,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:47,720 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:48,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 626 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-07-24 14:27:49,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 480 proven. 74 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-07-24 14:27:49,744 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:27:49,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-07-24 14:27:49,744 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:27:49,745 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:27:49,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:27:49,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:27:49,746 INFO L87 Difference]: Start difference. First operand 6629 states and 8247 transitions. Second operand 7 states. [2018-07-24 14:27:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:27:52,514 INFO L93 Difference]: Finished difference Result 13404 states and 16737 transitions. [2018-07-24 14:27:52,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:27:52,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 478 [2018-07-24 14:27:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:27:52,544 INFO L225 Difference]: With dead ends: 13404 [2018-07-24 14:27:52,544 INFO L226 Difference]: Without dead ends: 6781 [2018-07-24 14:27:52,567 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1932 GetRequests, 1902 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:27:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6781 states. [2018-07-24 14:27:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6781 to 5906. [2018-07-24 14:27:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5906 states. [2018-07-24 14:27:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5906 states to 5906 states and 7037 transitions. [2018-07-24 14:27:52,708 INFO L78 Accepts]: Start accepts. Automaton has 5906 states and 7037 transitions. Word has length 478 [2018-07-24 14:27:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:27:52,709 INFO L471 AbstractCegarLoop]: Abstraction has 5906 states and 7037 transitions. [2018-07-24 14:27:52,709 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:27:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 5906 states and 7037 transitions. [2018-07-24 14:27:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2018-07-24 14:27:52,733 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:27:52,733 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:27:52,734 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:27:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash 984114972, now seen corresponding path program 1 times [2018-07-24 14:27:52,734 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:27:52,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:52,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:52,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:27:52,735 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:27:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:53,316 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:27:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 641 proven. 399 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-07-24 14:27:54,200 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:54,200 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 14:27:54,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:54,208 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:54,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 857 proven. 2 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-07-24 14:27:54,888 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 635 proven. 74 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2018-07-24 14:27:55,604 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:27:55,604 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:27:55,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:27:55,619 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:27:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:27:56,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:27:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 649 proven. 210 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-07-24 14:27:56,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:27:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 346 proven. 571 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:27:57,550 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:27:57,550 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-07-24 14:27:57,551 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:27:57,552 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:27:57,552 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:27:57,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:27:57,553 INFO L87 Difference]: Start difference. First operand 5906 states and 7037 transitions. Second operand 13 states. [2018-07-24 14:27:59,122 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-07-24 14:28:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:03,663 INFO L93 Difference]: Finished difference Result 12399 states and 15112 transitions. [2018-07-24 14:28:03,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:28:03,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 563 [2018-07-24 14:28:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:03,691 INFO L225 Difference]: With dead ends: 12399 [2018-07-24 14:28:03,692 INFO L226 Difference]: Without dead ends: 6296 [2018-07-24 14:28:03,706 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2282 GetRequests, 2241 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:28:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2018-07-24 14:28:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6087. [2018-07-24 14:28:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6087 states. [2018-07-24 14:28:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 7033 transitions. [2018-07-24 14:28:03,841 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 7033 transitions. Word has length 563 [2018-07-24 14:28:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:03,841 INFO L471 AbstractCegarLoop]: Abstraction has 6087 states and 7033 transitions. [2018-07-24 14:28:03,842 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:28:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 7033 transitions. [2018-07-24 14:28:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2018-07-24 14:28:03,866 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:03,867 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:03,867 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:03,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1332628848, now seen corresponding path program 2 times [2018-07-24 14:28:03,867 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:03,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:03,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:03,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:03,868 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 667 proven. 425 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-07-24 14:28:05,594 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:05,594 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:28:05,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:28:05,603 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:28:05,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:28:05,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:28:05,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 883 proven. 2 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-07-24 14:28:06,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 661 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 14:28:07,233 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:07,233 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:28:07,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:28:07,251 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:28:07,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:28:07,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:28:07,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 868 proven. 17 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-07-24 14:28:08,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:09,000 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-07-24 14:28:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 340 proven. 603 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-07-24 14:28:10,927 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:10,928 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-07-24 14:28:10,928 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:10,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 14:28:10,929 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 14:28:10,930 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2018-07-24 14:28:10,930 INFO L87 Difference]: Start difference. First operand 6087 states and 7033 transitions. Second operand 18 states. [2018-07-24 14:28:12,227 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-07-24 14:28:14,953 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-07-24 14:28:16,852 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-07-24 14:28:17,323 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2018-07-24 14:28:17,673 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-07-24 14:28:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:21,638 INFO L93 Difference]: Finished difference Result 16031 states and 18798 transitions. [2018-07-24 14:28:21,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-24 14:28:21,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 589 [2018-07-24 14:28:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:21,667 INFO L225 Difference]: With dead ends: 16031 [2018-07-24 14:28:21,667 INFO L226 Difference]: Without dead ends: 9950 [2018-07-24 14:28:21,686 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2433 GetRequests, 2354 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2018-07-24 14:28:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2018-07-24 14:28:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 9211. [2018-07-24 14:28:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9211 states. [2018-07-24 14:28:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9211 states to 9211 states and 10257 transitions. [2018-07-24 14:28:21,868 INFO L78 Accepts]: Start accepts. Automaton has 9211 states and 10257 transitions. Word has length 589 [2018-07-24 14:28:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:21,869 INFO L471 AbstractCegarLoop]: Abstraction has 9211 states and 10257 transitions. [2018-07-24 14:28:21,869 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 14:28:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 9211 states and 10257 transitions. [2018-07-24 14:28:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-07-24 14:28:21,886 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:21,887 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 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] [2018-07-24 14:28:21,887 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1468638078, now seen corresponding path program 1 times [2018-07-24 14:28:21,888 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:21,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:21,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 14:28:21,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:21,890 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 668 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 14:28:22,674 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:22,674 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:28:22,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:22,682 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:22,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 890 proven. 2 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-07-24 14:28:23,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 668 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 14:28:23,743 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:23,743 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:28:23,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:23,758 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:24,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 890 proven. 2 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-07-24 14:28:24,431 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 668 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 14:28:25,051 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:25,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:28:25,052 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:25,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:28:25,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:28:25,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:28:25,054 INFO L87 Difference]: Start difference. First operand 9211 states and 10257 transitions. Second operand 7 states. [2018-07-24 14:28:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:28,927 INFO L93 Difference]: Finished difference Result 24415 states and 30347 transitions. [2018-07-24 14:28:28,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:28:28,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 663 [2018-07-24 14:28:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:29,004 INFO L225 Difference]: With dead ends: 24415 [2018-07-24 14:28:29,004 INFO L226 Difference]: Without dead ends: 15393 [2018-07-24 14:28:29,059 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2668 GetRequests, 2653 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:28:29,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15393 states. [2018-07-24 14:28:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15393 to 15011. [2018-07-24 14:28:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15011 states. [2018-07-24 14:28:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15011 states to 15011 states and 17026 transitions. [2018-07-24 14:28:29,420 INFO L78 Accepts]: Start accepts. Automaton has 15011 states and 17026 transitions. Word has length 663 [2018-07-24 14:28:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:29,421 INFO L471 AbstractCegarLoop]: Abstraction has 15011 states and 17026 transitions. [2018-07-24 14:28:29,422 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:28:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 15011 states and 17026 transitions. [2018-07-24 14:28:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2018-07-24 14:28:29,447 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:29,448 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:28:29,448 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1532216801, now seen corresponding path program 1 times [2018-07-24 14:28:29,449 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:29,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:29,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:29,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:29,452 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:30,798 WARN L169 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 14:28:31,288 WARN L169 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 14:28:31,679 WARN L169 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-07-24 14:28:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 971 proven. 712 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2018-07-24 14:28:32,549 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:32,549 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 14:28:32,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:32,556 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:32,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 1320 proven. 2 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2018-07-24 14:28:33,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:34,140 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-07-24 14:28:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 959 proven. 74 refuted. 0 times theorem prover too weak. 1213 trivial. 0 not checked. [2018-07-24 14:28:34,961 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:34,961 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:28:34,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:34,978 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:35,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 1312 proven. 10 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2018-07-24 14:28:36,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:36,131 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:28:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 464 proven. 916 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-07-24 14:28:37,496 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:37,497 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-07-24 14:28:37,497 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:37,498 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:28:37,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:28:37,499 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-07-24 14:28:37,499 INFO L87 Difference]: Start difference. First operand 15011 states and 17026 transitions. Second operand 17 states. [2018-07-24 14:28:44,082 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2018-07-24 14:28:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:28:46,171 INFO L93 Difference]: Finished difference Result 30588 states and 36215 transitions. [2018-07-24 14:28:46,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-24 14:28:46,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 752 [2018-07-24 14:28:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:28:46,223 INFO L225 Difference]: With dead ends: 30588 [2018-07-24 14:28:46,223 INFO L226 Difference]: Without dead ends: 14982 [2018-07-24 14:28:46,278 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3091 GetRequests, 3014 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1098, Invalid=4014, Unknown=0, NotChecked=0, Total=5112 [2018-07-24 14:28:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14982 states. [2018-07-24 14:28:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14982 to 14591. [2018-07-24 14:28:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14591 states. [2018-07-24 14:28:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14591 states to 14591 states and 16084 transitions. [2018-07-24 14:28:46,564 INFO L78 Accepts]: Start accepts. Automaton has 14591 states and 16084 transitions. Word has length 752 [2018-07-24 14:28:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:28:46,565 INFO L471 AbstractCegarLoop]: Abstraction has 14591 states and 16084 transitions. [2018-07-24 14:28:46,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:28:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14591 states and 16084 transitions. [2018-07-24 14:28:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-07-24 14:28:46,580 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:28:46,581 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-07-24 14:28:46,581 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:28:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash -170515469, now seen corresponding path program 1 times [2018-07-24 14:28:46,582 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:28:46,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:46,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:46,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:28:46,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:28:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 905 proven. 677 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-07-24 14:28:49,156 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:49,156 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:28:49,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:49,164 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:49,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 1190 proven. 2 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2018-07-24 14:28:49,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 898 proven. 74 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2018-07-24 14:28:50,277 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:28:50,277 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:28:50,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:28:50,293 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:28:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:28:50,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:28:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 1190 proven. 2 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2018-07-24 14:28:51,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:28:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 898 proven. 74 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2018-07-24 14:28:51,557 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:28:51,558 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-07-24 14:28:51,558 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:28:51,559 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 14:28:51,559 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 14:28:51,559 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:28:51,559 INFO L87 Difference]: Start difference. First operand 14591 states and 16084 transitions. Second operand 20 states. [2018-07-24 14:29:01,044 WARN L169 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2018-07-24 14:29:03,902 WARN L169 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-07-24 14:29:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:29:06,769 INFO L93 Difference]: Finished difference Result 32038 states and 36130 transitions. [2018-07-24 14:29:06,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-24 14:29:06,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 823 [2018-07-24 14:29:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:29:06,816 INFO L225 Difference]: With dead ends: 32038 [2018-07-24 14:29:06,817 INFO L226 Difference]: Without dead ends: 17310 [2018-07-24 14:29:06,857 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3456 GetRequests, 3352 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3300 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1374, Invalid=8526, Unknown=0, NotChecked=0, Total=9900 [2018-07-24 14:29:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17310 states. [2018-07-24 14:29:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17310 to 16938. [2018-07-24 14:29:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16938 states. [2018-07-24 14:29:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16938 states to 16938 states and 18459 transitions. [2018-07-24 14:29:07,165 INFO L78 Accepts]: Start accepts. Automaton has 16938 states and 18459 transitions. Word has length 823 [2018-07-24 14:29:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:29:07,166 INFO L471 AbstractCegarLoop]: Abstraction has 16938 states and 18459 transitions. [2018-07-24 14:29:07,166 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 14:29:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 16938 states and 18459 transitions. [2018-07-24 14:29:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1081 [2018-07-24 14:29:07,200 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:29:07,201 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:29:07,201 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:29:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash -701626479, now seen corresponding path program 1 times [2018-07-24 14:29:07,202 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:29:07,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:07,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:07,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:29:07,204 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:29:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:08,757 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2018-07-24 14:29:08,895 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-07-24 14:29:09,060 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-07-24 14:29:09,208 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-07-24 14:29:09,391 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2018-07-24 14:29:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 1407 proven. 2201 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2018-07-24 14:29:13,301 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:13,301 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:29:13,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:13,309 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:13,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 1177 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-07-24 14:29:14,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 1177 proven. 2 refuted. 0 times theorem prover too weak. 2595 trivial. 0 not checked. [2018-07-24 14:29:15,370 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:29:15,371 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:29:15,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:29:15,388 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:29:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:29:16,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:29:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 2264 proven. 6 refuted. 0 times theorem prover too weak. 1504 trivial. 0 not checked. [2018-07-24 14:29:17,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:29:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 1762 proven. 221 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2018-07-24 14:29:18,371 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:29:18,371 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 5, 5, 7, 8] total 50 [2018-07-24 14:29:18,372 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:29:18,374 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-24 14:29:18,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-24 14:29:18,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2018-07-24 14:29:18,376 INFO L87 Difference]: Start difference. First operand 16938 states and 18459 transitions. Second operand 37 states. [2018-07-24 14:29:20,217 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2018-07-24 14:29:20,442 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2018-07-24 14:29:22,160 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2018-07-24 14:29:23,117 WARN L169 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2018-07-24 14:29:23,440 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-07-24 14:29:23,678 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2018-07-24 14:29:24,172 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2018-07-24 14:29:25,709 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 24 [2018-07-24 14:29:27,994 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2018-07-24 14:29:30,584 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-07-24 14:29:30,991 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2018-07-24 14:29:31,880 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2018-07-24 14:29:32,055 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2018-07-24 14:29:32,502 WARN L169 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2018-07-24 14:29:33,353 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2018-07-24 14:29:34,048 WARN L169 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2018-07-24 14:29:36,111 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2018-07-24 14:29:36,374 WARN L169 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2018-07-24 14:29:36,694 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2018-07-24 14:29:38,743 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2018-07-24 14:29:39,229 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2018-07-24 14:29:40,428 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2018-07-24 14:29:41,656 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2018-07-24 14:29:42,531 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2018-07-24 14:29:43,309 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2018-07-24 14:29:43,815 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2018-07-24 14:29:44,089 WARN L169 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2018-07-24 14:29:44,560 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2018-07-24 14:29:45,111 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2018-07-24 14:29:45,795 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2018-07-24 14:29:47,099 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2018-07-24 14:29:47,326 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-07-24 14:29:47,628 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-07-24 14:29:48,707 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2018-07-24 14:29:52,232 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-07-24 14:29:52,881 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2018-07-24 14:29:56,133 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2018-07-24 14:30:04,229 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2018-07-24 14:30:04,463 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 33 [2018-07-24 14:30:06,115 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2018-07-24 14:30:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:07,468 INFO L93 Difference]: Finished difference Result 38230 states and 45673 transitions. [2018-07-24 14:30:07,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-24 14:30:07,468 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 1080 [2018-07-24 14:30:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:07,529 INFO L225 Difference]: With dead ends: 38230 [2018-07-24 14:30:07,530 INFO L226 Difference]: Without dead ends: 20030 [2018-07-24 14:30:07,600 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4563 GetRequests, 4362 SyntacticMatches, 7 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13177 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=4857, Invalid=33363, Unknown=0, NotChecked=0, Total=38220 [2018-07-24 14:30:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20030 states. [2018-07-24 14:30:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20030 to 16277. [2018-07-24 14:30:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16277 states. [2018-07-24 14:30:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16277 states to 16277 states and 17341 transitions. [2018-07-24 14:30:07,947 INFO L78 Accepts]: Start accepts. Automaton has 16277 states and 17341 transitions. Word has length 1080 [2018-07-24 14:30:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:07,947 INFO L471 AbstractCegarLoop]: Abstraction has 16277 states and 17341 transitions. [2018-07-24 14:30:07,948 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-24 14:30:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 16277 states and 17341 transitions. [2018-07-24 14:30:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2018-07-24 14:30:07,966 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:07,967 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:07,967 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1402046927, now seen corresponding path program 1 times [2018-07-24 14:30:07,968 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:07,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:07,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:07,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:07,969 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 869 proven. 2140 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-07-24 14:30:11,833 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:11,833 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:30:11,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:11,846 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:12,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 2413 proven. 6 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2018-07-24 14:30:13,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 1911 proven. 269 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2018-07-24 14:30:14,240 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:14,241 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:30:14,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:14,256 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:15,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 2413 proven. 6 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2018-07-24 14:30:16,111 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 1911 proven. 269 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2018-07-24 14:30:17,390 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:17,391 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 7, 8, 7, 8] total 36 [2018-07-24 14:30:17,391 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:17,392 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-24 14:30:17,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-24 14:30:17,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2018-07-24 14:30:17,393 INFO L87 Difference]: Start difference. First operand 16277 states and 17341 transitions. Second operand 31 states. [2018-07-24 14:30:18,409 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2018-07-24 14:30:21,661 WARN L169 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2018-07-24 14:30:21,949 WARN L169 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2018-07-24 14:30:22,197 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2018-07-24 14:30:24,126 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-07-24 14:30:24,834 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2018-07-24 14:30:27,262 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2018-07-24 14:30:28,121 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2018-07-24 14:30:29,532 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2018-07-24 14:30:31,835 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2018-07-24 14:30:34,553 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2018-07-24 14:30:35,843 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2018-07-24 14:30:40,804 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-07-24 14:30:41,033 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2018-07-24 14:30:41,474 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2018-07-24 14:30:41,768 WARN L169 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2018-07-24 14:30:42,037 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2018-07-24 14:30:42,476 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2018-07-24 14:30:44,149 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2018-07-24 14:30:46,580 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2018-07-24 14:30:47,634 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2018-07-24 14:30:48,275 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2018-07-24 14:30:48,602 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2018-07-24 14:30:48,843 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2018-07-24 14:30:49,209 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2018-07-24 14:30:49,813 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2018-07-24 14:30:50,904 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-07-24 14:30:51,605 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2018-07-24 14:30:51,767 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-07-24 14:30:52,567 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2018-07-24 14:30:52,873 WARN L169 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2018-07-24 14:30:55,308 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-07-24 14:30:57,196 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2018-07-24 14:30:57,511 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2018-07-24 14:30:58,182 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2018-07-24 14:30:58,523 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2018-07-24 14:31:01,150 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2018-07-24 14:31:01,915 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 Received shutdown request... [2018-07-24 14:31:03,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-24 14:31:03,389 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:31:03,396 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:31:03,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:31:03 BoogieIcfgContainer [2018-07-24 14:31:03,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:31:03,397 INFO L168 Benchmark]: Toolchain (without parser) took 236405.53 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.0 GB). Peak memory consumption was 580.5 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:03,398 INFO L168 Benchmark]: CDTParser took 0.21 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 14:31:03,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 807.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:03,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 127.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:03,399 INFO L168 Benchmark]: Boogie Preprocessor took 340.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -912.4 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:03,400 INFO L168 Benchmark]: RCFGBuilder took 3850.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 154.0 MB). Peak memory consumption was 154.0 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:03,400 INFO L168 Benchmark]: TraceAbstraction took 231272.21 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 475.9 MB. Max. memory is 7.1 GB. [2018-07-24 14:31:03,403 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 807.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 127.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 340.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 799.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -912.4 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3850.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 154.0 MB). Peak memory consumption was 154.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231272.21 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 475.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 190]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 190). Cancelled while BasicCegarLoop was constructing difference of abstraction (16277states) and interpolant automaton (currently 118 states, 31 states before enhancement), while ReachableStatesComputation was computing reachable states (23975 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 231.1s OverallTime, 14 OverallIterations, 10 TraceHistogramMax, 163.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1563 SDtfs, 59875 SDslu, 6432 SDs, 0 SdLazy, 78674 SolverSat, 9895 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 100.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27854 GetRequests, 27056 SyntacticMatches, 87 SemanticMatches, 711 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27763 ImplicationChecksByTransitivity, 64.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16938occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 7780 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 6.6s SatisfiabilityAnalysisTime, 46.0s InterpolantComputationTime, 20868 NumberOfCodeBlocks, 20868 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 34274 ConstructedInterpolants, 36 QuantifiedInterpolants, 130919776 SizeOfPredicates, 65 NumberOfNonLiveVariables, 19782 ConjunctsInSsa, 344 ConjunctsInUnsatCore, 54 InterpolantComputations, 5 PerfectInterpolantSequences, 74816/86464 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/Problem14_label19_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-31-03-415.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label19_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-31-03-415.csv Completed graceful shutdown