java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:31:55,236 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:31:55,241 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:31:55,254 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:31:55,254 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:31:55,255 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:31:55,257 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:31:55,258 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:31:55,260 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:31:55,261 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:31:55,262 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:31:55,262 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:31:55,263 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:31:55,264 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:31:55,265 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:31:55,266 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:31:55,267 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:31:55,272 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:31:55,275 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:31:55,276 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:31:55,277 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:31:55,278 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:31:55,281 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:31:55,281 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:31:55,281 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:31:55,282 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:31:55,283 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:31:55,284 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:31:55,285 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:31:55,286 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:31:55,290 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:31:55,290 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:31:55,291 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:31:55,291 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:31:55,292 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:31:55,295 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:31:55,295 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 10:31:55,312 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:31:55,312 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:31:55,313 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:31:55,313 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:31:55,314 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:31:55,314 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:31:55,314 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:31:55,314 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:31:55,314 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:31:55,315 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:31:55,315 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:31:55,316 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:31:55,316 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:31:55,316 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:31:55,316 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:31:55,316 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:31:55,317 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:31:55,317 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:31:55,317 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:31:55,317 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:31:55,317 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:31:55,318 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:31:55,318 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:31:55,318 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:31:55,318 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:31:55,318 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:31:55,319 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:31:55,319 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:31:55,319 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:31:55,319 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:31:55,319 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:31:55,320 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:31:55,320 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:31:55,377 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:31:55,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:31:55,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:31:55,394 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:31:55,394 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:31:55,395 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label59_true-unreach-call.c [2018-09-10 10:31:55,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f348980e/f982a52af07e402a91766e7fe688ef04/FLAG65f4e9cef [2018-09-10 10:31:56,080 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:31:56,081 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label59_true-unreach-call.c [2018-09-10 10:31:56,104 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f348980e/f982a52af07e402a91766e7fe688ef04/FLAG65f4e9cef [2018-09-10 10:31:56,120 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f348980e/f982a52af07e402a91766e7fe688ef04 [2018-09-10 10:31:56,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:31:56,134 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:31:56,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:31:56,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:31:56,146 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:31:56,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:31:56" (1/1) ... [2018-09-10 10:31:56,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e4f929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:56, skipping insertion in model container [2018-09-10 10:31:56,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:31:56" (1/1) ... [2018-09-10 10:31:56,377 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:31:56,887 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:31:56,908 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:31:57,211 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:31:57,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57 WrapperNode [2018-09-10 10:31:57,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:31:57,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:31:57,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:31:57,282 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:31:57,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:31:57,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:31:57,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:31:57,454 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:31:57,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... [2018-09-10 10:31:57,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:31:57,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:31:57,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:31:57,820 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:31:57,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:31:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:31:57,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:31:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:31:57,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:31:57,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:31:57,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:31:57,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:31:57,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:32:03,186 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:32:03,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:32:03 BoogieIcfgContainer [2018-09-10 10:32:03,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:32:03,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:32:03,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:32:03,193 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:32:03,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:31:56" (1/3) ... [2018-09-10 10:32:03,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146f396b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:32:03, skipping insertion in model container [2018-09-10 10:32:03,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:31:57" (2/3) ... [2018-09-10 10:32:03,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146f396b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:32:03, skipping insertion in model container [2018-09-10 10:32:03,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:32:03" (3/3) ... [2018-09-10 10:32:03,197 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label59_true-unreach-call.c [2018-09-10 10:32:03,209 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:32:03,220 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:32:03,293 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:32:03,294 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:32:03,295 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:32:03,295 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:32:03,295 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:32:03,295 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:32:03,295 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:32:03,296 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:32:03,296 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:32:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:32:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-10 10:32:03,358 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:03,359 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:03,361 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:03,368 INFO L82 PathProgramCache]: Analyzing trace with hash -209089196, now seen corresponding path program 1 times [2018-09-10 10:32:03,371 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:03,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:03,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:03,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:03,437 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:04,327 WARN L175 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:32:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:04,573 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:32:04,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:32:04,574 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:04,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:32:04,600 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:32:04,601 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:04,604 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-10 10:32:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:06,639 INFO L93 Difference]: Finished difference Result 855 states and 1508 transitions. [2018-09-10 10:32:06,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:32:06,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2018-09-10 10:32:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:06,665 INFO L225 Difference]: With dead ends: 855 [2018-09-10 10:32:06,666 INFO L226 Difference]: Without dead ends: 541 [2018-09-10 10:32:06,673 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2018-09-10 10:32:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 527. [2018-09-10 10:32:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-09-10 10:32:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 901 transitions. [2018-09-10 10:32:06,785 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 901 transitions. Word has length 181 [2018-09-10 10:32:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:06,786 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 901 transitions. [2018-09-10 10:32:06,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:32:06,787 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 901 transitions. [2018-09-10 10:32:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-10 10:32:06,795 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:06,795 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:06,795 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1709124531, now seen corresponding path program 1 times [2018-09-10 10:32:06,796 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:06,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:06,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:06,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:06,798 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:07,085 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:32:07,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:32:07,086 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:07,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:32:07,088 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:32:07,089 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:32:07,089 INFO L87 Difference]: Start difference. First operand 527 states and 901 transitions. Second operand 6 states. [2018-09-10 10:32:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:10,453 INFO L93 Difference]: Finished difference Result 1495 states and 2644 transitions. [2018-09-10 10:32:10,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:32:10,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2018-09-10 10:32:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:10,464 INFO L225 Difference]: With dead ends: 1495 [2018-09-10 10:32:10,464 INFO L226 Difference]: Without dead ends: 974 [2018-09-10 10:32:10,467 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:32:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2018-09-10 10:32:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 953. [2018-09-10 10:32:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-09-10 10:32:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1539 transitions. [2018-09-10 10:32:10,520 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1539 transitions. Word has length 191 [2018-09-10 10:32:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:10,520 INFO L480 AbstractCegarLoop]: Abstraction has 953 states and 1539 transitions. [2018-09-10 10:32:10,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:32:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1539 transitions. [2018-09-10 10:32:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-10 10:32:10,525 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:10,526 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:10,526 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1719938640, now seen corresponding path program 1 times [2018-09-10 10:32:10,526 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:10,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:10,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:10,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:10,528 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:10,815 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:32:10,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:32:10,816 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:10,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:32:10,817 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:32:10,817 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:10,818 INFO L87 Difference]: Start difference. First operand 953 states and 1539 transitions. Second operand 3 states. [2018-09-10 10:32:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:13,207 INFO L93 Difference]: Finished difference Result 2747 states and 4565 transitions. [2018-09-10 10:32:13,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:32:13,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2018-09-10 10:32:13,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:13,222 INFO L225 Difference]: With dead ends: 2747 [2018-09-10 10:32:13,222 INFO L226 Difference]: Without dead ends: 1800 [2018-09-10 10:32:13,227 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2018-09-10 10:32:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1799. [2018-09-10 10:32:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1799 states. [2018-09-10 10:32:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2765 transitions. [2018-09-10 10:32:13,320 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2765 transitions. Word has length 194 [2018-09-10 10:32:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:13,321 INFO L480 AbstractCegarLoop]: Abstraction has 1799 states and 2765 transitions. [2018-09-10 10:32:13,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:32:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2765 transitions. [2018-09-10 10:32:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-10 10:32:13,332 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:13,333 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:13,333 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1048894964, now seen corresponding path program 1 times [2018-09-10 10:32:13,333 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:13,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:13,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:13,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:13,335 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:13,786 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:32:13,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:32:13,786 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:13,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:32:13,787 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:32:13,787 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:13,787 INFO L87 Difference]: Start difference. First operand 1799 states and 2765 transitions. Second operand 3 states. [2018-09-10 10:32:15,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:15,366 INFO L93 Difference]: Finished difference Result 4431 states and 6809 transitions. [2018-09-10 10:32:15,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:32:15,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2018-09-10 10:32:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:15,388 INFO L225 Difference]: With dead ends: 4431 [2018-09-10 10:32:15,389 INFO L226 Difference]: Without dead ends: 2638 [2018-09-10 10:32:15,398 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2018-09-10 10:32:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2638. [2018-09-10 10:32:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2638 states. [2018-09-10 10:32:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3811 transitions. [2018-09-10 10:32:15,548 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3811 transitions. Word has length 196 [2018-09-10 10:32:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:15,550 INFO L480 AbstractCegarLoop]: Abstraction has 2638 states and 3811 transitions. [2018-09-10 10:32:15,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:32:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3811 transitions. [2018-09-10 10:32:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-10 10:32:15,560 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:15,561 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:15,561 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash -953813608, now seen corresponding path program 1 times [2018-09-10 10:32:15,561 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:15,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:15,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:15,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:15,563 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:15,808 WARN L175 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:32:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:15,902 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:32:15,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:32:15,902 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:15,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:32:15,903 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:32:15,903 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:32:15,904 INFO L87 Difference]: Start difference. First operand 2638 states and 3811 transitions. Second operand 6 states. [2018-09-10 10:32:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:19,036 INFO L93 Difference]: Finished difference Result 8297 states and 12893 transitions. [2018-09-10 10:32:19,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:32:19,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 198 [2018-09-10 10:32:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:19,080 INFO L225 Difference]: With dead ends: 8297 [2018-09-10 10:32:19,081 INFO L226 Difference]: Without dead ends: 5665 [2018-09-10 10:32:19,101 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:32:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2018-09-10 10:32:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5577. [2018-09-10 10:32:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5577 states. [2018-09-10 10:32:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 7852 transitions. [2018-09-10 10:32:19,283 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 7852 transitions. Word has length 198 [2018-09-10 10:32:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:19,283 INFO L480 AbstractCegarLoop]: Abstraction has 5577 states and 7852 transitions. [2018-09-10 10:32:19,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:32:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 7852 transitions. [2018-09-10 10:32:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-10 10:32:19,305 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:19,305 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:19,306 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1285756265, now seen corresponding path program 1 times [2018-09-10 10:32:19,306 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:19,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:19,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:19,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:19,308 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:19,569 WARN L175 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:32:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:32:19,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:32:19,791 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:32:19,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:19,800 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:32:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:20,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:32:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-10 10:32:20,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:32:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:32:20,620 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:32:20,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-10 10:32:20,621 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:20,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:32:20,621 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:32:20,622 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 10:32:20,622 INFO L87 Difference]: Start difference. First operand 5577 states and 7852 transitions. Second operand 5 states. [2018-09-10 10:32:21,418 WARN L175 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-10 10:32:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:23,660 INFO L93 Difference]: Finished difference Result 11475 states and 16678 transitions. [2018-09-10 10:32:23,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:32:23,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2018-09-10 10:32:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:23,694 INFO L225 Difference]: With dead ends: 11475 [2018-09-10 10:32:23,694 INFO L226 Difference]: Without dead ends: 5904 [2018-09-10 10:32:23,718 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 460 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:32:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2018-09-10 10:32:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5765. [2018-09-10 10:32:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5765 states. [2018-09-10 10:32:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 7571 transitions. [2018-09-10 10:32:23,902 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 7571 transitions. Word has length 233 [2018-09-10 10:32:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:23,902 INFO L480 AbstractCegarLoop]: Abstraction has 5765 states and 7571 transitions. [2018-09-10 10:32:23,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:32:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 7571 transitions. [2018-09-10 10:32:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-10 10:32:23,924 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:23,925 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:23,925 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash 295041680, now seen corresponding path program 1 times [2018-09-10 10:32:23,930 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:23,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:23,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:23,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:23,932 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-10 10:32:24,301 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:32:24,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:32:24,301 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:24,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:32:24,304 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:32:24,304 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:24,304 INFO L87 Difference]: Start difference. First operand 5765 states and 7571 transitions. Second operand 3 states. [2018-09-10 10:32:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:26,350 INFO L93 Difference]: Finished difference Result 16924 states and 22807 transitions. [2018-09-10 10:32:26,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:32:26,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 244 [2018-09-10 10:32:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:26,426 INFO L225 Difference]: With dead ends: 16924 [2018-09-10 10:32:26,426 INFO L226 Difference]: Without dead ends: 11165 [2018-09-10 10:32:26,451 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11165 states. [2018-09-10 10:32:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11165 to 11157. [2018-09-10 10:32:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11157 states. [2018-09-10 10:32:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11157 states to 11157 states and 14608 transitions. [2018-09-10 10:32:26,750 INFO L78 Accepts]: Start accepts. Automaton has 11157 states and 14608 transitions. Word has length 244 [2018-09-10 10:32:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:26,751 INFO L480 AbstractCegarLoop]: Abstraction has 11157 states and 14608 transitions. [2018-09-10 10:32:26,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:32:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 11157 states and 14608 transitions. [2018-09-10 10:32:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-10 10:32:26,794 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:26,794 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:26,794 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash 403736196, now seen corresponding path program 1 times [2018-09-10 10:32:26,795 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:26,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:26,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:26,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:26,796 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:32:27,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:32:27,320 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:32:27,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:27,337 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:32:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:27,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:32:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-10 10:32:28,098 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:32:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 86 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-09-10 10:32:28,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:32:28,625 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:32:28,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:28,644 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:32:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:29,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:32:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-10 10:32:29,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:32:29,725 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-10 10:32:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 86 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-09-10 10:32:29,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:32:29,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:32:29,942 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:32:29,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:32:29,943 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:32:29,944 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:32:29,944 INFO L87 Difference]: Start difference. First operand 11157 states and 14608 transitions. Second operand 9 states. [2018-09-10 10:32:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:34,960 INFO L93 Difference]: Finished difference Result 43739 states and 60959 transitions. [2018-09-10 10:32:34,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:32:34,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 254 [2018-09-10 10:32:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:35,141 INFO L225 Difference]: With dead ends: 43739 [2018-09-10 10:32:35,141 INFO L226 Difference]: Without dead ends: 32588 [2018-09-10 10:32:35,194 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 1009 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2018-09-10 10:32:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32588 states. [2018-09-10 10:32:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32588 to 32321. [2018-09-10 10:32:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32321 states. [2018-09-10 10:32:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32321 states to 32321 states and 41921 transitions. [2018-09-10 10:32:36,415 INFO L78 Accepts]: Start accepts. Automaton has 32321 states and 41921 transitions. Word has length 254 [2018-09-10 10:32:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:36,415 INFO L480 AbstractCegarLoop]: Abstraction has 32321 states and 41921 transitions. [2018-09-10 10:32:36,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:32:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 32321 states and 41921 transitions. [2018-09-10 10:32:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-10 10:32:36,502 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:36,502 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:36,503 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:36,503 INFO L82 PathProgramCache]: Analyzing trace with hash -21971294, now seen corresponding path program 1 times [2018-09-10 10:32:36,503 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:36,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:36,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:36,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:36,504 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:36,918 WARN L175 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:32:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:37,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:32:37,657 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-10 10:32:37,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:37,672 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:32:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:37,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:32:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:38,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:32:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:38,679 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:32:38,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 10:32:38,679 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:38,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:32:38,680 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:32:38,680 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:32:38,681 INFO L87 Difference]: Start difference. First operand 32321 states and 41921 transitions. Second operand 3 states. [2018-09-10 10:32:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:42,449 INFO L93 Difference]: Finished difference Result 91659 states and 119863 transitions. [2018-09-10 10:32:42,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:32:42,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2018-09-10 10:32:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:42,732 INFO L225 Difference]: With dead ends: 91659 [2018-09-10 10:32:42,732 INFO L226 Difference]: Without dead ends: 59344 [2018-09-10 10:32:42,843 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 519 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:32:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59344 states. [2018-09-10 10:32:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59344 to 59152. [2018-09-10 10:32:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59152 states. [2018-09-10 10:32:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59152 states to 59152 states and 75696 transitions. [2018-09-10 10:32:44,675 INFO L78 Accepts]: Start accepts. Automaton has 59152 states and 75696 transitions. Word has length 260 [2018-09-10 10:32:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:44,675 INFO L480 AbstractCegarLoop]: Abstraction has 59152 states and 75696 transitions. [2018-09-10 10:32:44,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:32:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59152 states and 75696 transitions. [2018-09-10 10:32:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-09-10 10:32:44,813 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:44,814 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:44,814 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1706502882, now seen corresponding path program 1 times [2018-09-10 10:32:44,817 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:44,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:44,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:44,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:44,818 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-10 10:32:45,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:32:45,244 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:32:45,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:45,261 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:32:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:45,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:32:46,243 WARN L175 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-09-10 10:32:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-10 10:32:46,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:32:46,796 WARN L175 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-09-10 10:32:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 123 proven. 46 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:32:47,206 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:32:47,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-09-10 10:32:47,207 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:47,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:32:47,208 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:32:47,208 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:32:47,208 INFO L87 Difference]: Start difference. First operand 59152 states and 75696 transitions. Second operand 6 states. [2018-09-10 10:32:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:51,060 INFO L93 Difference]: Finished difference Result 120079 states and 157897 transitions. [2018-09-10 10:32:51,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:32:51,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2018-09-10 10:32:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:51,425 INFO L225 Difference]: With dead ends: 120079 [2018-09-10 10:32:51,426 INFO L226 Difference]: Without dead ends: 60930 [2018-09-10 10:32:51,609 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 626 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:32:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60930 states. [2018-09-10 10:32:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60930 to 59603. [2018-09-10 10:32:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59603 states. [2018-09-10 10:32:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59603 states to 59603 states and 76081 transitions. [2018-09-10 10:32:53,397 INFO L78 Accepts]: Start accepts. Automaton has 59603 states and 76081 transitions. Word has length 317 [2018-09-10 10:32:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:53,397 INFO L480 AbstractCegarLoop]: Abstraction has 59603 states and 76081 transitions. [2018-09-10 10:32:53,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:32:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 59603 states and 76081 transitions. [2018-09-10 10:32:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-10 10:32:53,491 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:53,491 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:53,492 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:53,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1307321120, now seen corresponding path program 1 times [2018-09-10 10:32:53,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:53,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:53,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:53,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:53,494 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:32:53,891 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:32:53,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:32:53,892 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:32:53,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:32:53,893 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:32:53,893 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:53,893 INFO L87 Difference]: Start difference. First operand 59603 states and 76081 transitions. Second operand 3 states. [2018-09-10 10:32:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:32:56,551 INFO L93 Difference]: Finished difference Result 118194 states and 151121 transitions. [2018-09-10 10:32:56,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:32:56,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 316 [2018-09-10 10:32:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:32:56,775 INFO L225 Difference]: With dead ends: 118194 [2018-09-10 10:32:56,776 INFO L226 Difference]: Without dead ends: 58597 [2018-09-10 10:32:56,924 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:32:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58597 states. [2018-09-10 10:32:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58597 to 57518. [2018-09-10 10:32:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57518 states. [2018-09-10 10:32:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57518 states to 57518 states and 70651 transitions. [2018-09-10 10:32:58,089 INFO L78 Accepts]: Start accepts. Automaton has 57518 states and 70651 transitions. Word has length 316 [2018-09-10 10:32:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:32:58,090 INFO L480 AbstractCegarLoop]: Abstraction has 57518 states and 70651 transitions. [2018-09-10 10:32:58,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:32:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 57518 states and 70651 transitions. [2018-09-10 10:32:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-10 10:32:58,190 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:32:58,191 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:32:58,191 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:32:58,191 INFO L82 PathProgramCache]: Analyzing trace with hash 833023514, now seen corresponding path program 1 times [2018-09-10 10:32:58,192 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:32:58,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:58,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:32:58,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:32:58,193 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:32:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:32:58,925 WARN L175 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 10:32:59,207 WARN L175 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-10 10:33:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 258 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:33:00,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:33:00,385 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:33:00,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:00,397 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:33:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:00,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:33:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-10 10:33:01,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:33:02,142 WARN L175 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-10 10:33:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 176 proven. 76 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:33:02,882 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:33:02,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 5] total 22 [2018-09-10 10:33:02,883 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:33:02,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:33:02,884 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:33:02,884 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2018-09-10 10:33:02,884 INFO L87 Difference]: Start difference. First operand 57518 states and 70651 transitions. Second operand 5 states. [2018-09-10 10:33:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:33:06,113 INFO L93 Difference]: Finished difference Result 139046 states and 176364 transitions. [2018-09-10 10:33:06,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:33:06,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 366 [2018-09-10 10:33:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:33:06,422 INFO L225 Difference]: With dead ends: 139046 [2018-09-10 10:33:06,423 INFO L226 Difference]: Without dead ends: 81534 [2018-09-10 10:33:06,577 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2018-09-10 10:33:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81534 states. [2018-09-10 10:33:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81534 to 80080. [2018-09-10 10:33:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80080 states. [2018-09-10 10:33:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80080 states to 80080 states and 95667 transitions. [2018-09-10 10:33:08,998 INFO L78 Accepts]: Start accepts. Automaton has 80080 states and 95667 transitions. Word has length 366 [2018-09-10 10:33:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:33:08,998 INFO L480 AbstractCegarLoop]: Abstraction has 80080 states and 95667 transitions. [2018-09-10 10:33:08,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:33:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 80080 states and 95667 transitions. [2018-09-10 10:33:09,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-09-10 10:33:09,129 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:33:09,129 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:33:09,130 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:33:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1151661347, now seen corresponding path program 1 times [2018-09-10 10:33:09,130 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:33:09,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:33:09,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:09,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:33:09,132 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:33:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:09,522 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:33:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 196 proven. 101 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:33:10,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:33:10,613 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:33:10,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:10,622 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:33:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:10,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:33:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-10 10:33:11,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:33:11,522 WARN L175 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-10 10:33:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 196 proven. 101 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:33:12,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:33:12,042 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:33:12,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:12,058 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:33:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:12,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:33:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 277 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-09-10 10:33:13,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:33:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 210 proven. 131 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:33:14,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:33:14,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 9, 11] total 35 [2018-09-10 10:33:14,366 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:33:14,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 10:33:14,367 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 10:33:14,367 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2018-09-10 10:33:14,368 INFO L87 Difference]: Start difference. First operand 80080 states and 95667 transitions. Second operand 16 states. [2018-09-10 10:33:17,763 WARN L175 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-09-10 10:33:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:33:26,233 INFO L93 Difference]: Finished difference Result 185226 states and 237984 transitions. [2018-09-10 10:33:26,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-10 10:33:26,234 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 378 [2018-09-10 10:33:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:33:26,555 INFO L225 Difference]: With dead ends: 185226 [2018-09-10 10:33:26,555 INFO L226 Difference]: Without dead ends: 105152 [2018-09-10 10:33:26,683 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1593 GetRequests, 1517 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1049, Invalid=4651, Unknown=0, NotChecked=0, Total=5700 [2018-09-10 10:33:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105152 states. [2018-09-10 10:33:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105152 to 99356. [2018-09-10 10:33:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99356 states. [2018-09-10 10:33:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99356 states to 99356 states and 122718 transitions. [2018-09-10 10:33:29,381 INFO L78 Accepts]: Start accepts. Automaton has 99356 states and 122718 transitions. Word has length 378 [2018-09-10 10:33:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:33:29,381 INFO L480 AbstractCegarLoop]: Abstraction has 99356 states and 122718 transitions. [2018-09-10 10:33:29,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 10:33:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 99356 states and 122718 transitions. [2018-09-10 10:33:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-09-10 10:33:29,572 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:33:29,572 INFO L376 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:33:29,573 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:33:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash 469577979, now seen corresponding path program 1 times [2018-09-10 10:33:29,573 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:33:29,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:33:29,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:29,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:33:29,574 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:33:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 201 proven. 14 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-10 10:33:30,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:33:30,215 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:33:30,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:30,235 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:33:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:30,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:33:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-10 10:33:31,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:33:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 201 proven. 14 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-10 10:33:31,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:33:31,525 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:33:31,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:31,541 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:33:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:32,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:33:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 243 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-10 10:33:32,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:33:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 207 proven. 118 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-10 10:33:33,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:33:33,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 10, 8] total 23 [2018-09-10 10:33:33,399 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:33:33,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:33:33,400 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:33:33,400 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2018-09-10 10:33:33,400 INFO L87 Difference]: Start difference. First operand 99356 states and 122718 transitions. Second operand 8 states. [2018-09-10 10:33:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:33:44,784 INFO L93 Difference]: Finished difference Result 216581 states and 288629 transitions. [2018-09-10 10:33:44,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-10 10:33:44,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 379 [2018-09-10 10:33:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:33:45,362 INFO L225 Difference]: With dead ends: 216581 [2018-09-10 10:33:45,363 INFO L226 Difference]: Without dead ends: 111233 [2018-09-10 10:33:45,694 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1579 GetRequests, 1528 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2018-09-10 10:33:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111233 states. [2018-09-10 10:33:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111233 to 105070. [2018-09-10 10:33:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105070 states. [2018-09-10 10:33:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105070 states to 105070 states and 126437 transitions. [2018-09-10 10:33:49,212 INFO L78 Accepts]: Start accepts. Automaton has 105070 states and 126437 transitions. Word has length 379 [2018-09-10 10:33:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:33:49,213 INFO L480 AbstractCegarLoop]: Abstraction has 105070 states and 126437 transitions. [2018-09-10 10:33:49,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 10:33:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 105070 states and 126437 transitions. [2018-09-10 10:33:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-09-10 10:33:49,379 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:33:49,379 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:33:49,380 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:33:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash -945446697, now seen corresponding path program 1 times [2018-09-10 10:33:49,380 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:33:49,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:33:49,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:49,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:33:49,381 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:33:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:49,814 WARN L175 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-10 10:33:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 223 proven. 101 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 10:33:50,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:33:50,241 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:33:50,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:33:50,249 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:33:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:33:50,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:33:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-09-10 10:33:50,731 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:33:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 225 proven. 90 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-09-10 10:33:51,039 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:33:51,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-10 10:33:51,040 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:33:51,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:33:51,041 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:33:51,041 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:33:51,041 INFO L87 Difference]: Start difference. First operand 105070 states and 126437 transitions. Second operand 5 states. [2018-09-10 10:33:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:33:56,765 INFO L93 Difference]: Finished difference Result 316322 states and 396823 transitions. [2018-09-10 10:33:56,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:33:56,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2018-09-10 10:33:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:33:57,765 INFO L225 Difference]: With dead ends: 316322 [2018-09-10 10:33:57,765 INFO L226 Difference]: Without dead ends: 212725 [2018-09-10 10:33:58,103 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 806 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:33:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212725 states. [2018-09-10 10:34:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212725 to 207664. [2018-09-10 10:34:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207664 states. [2018-09-10 10:34:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207664 states to 207664 states and 250572 transitions. [2018-09-10 10:34:07,674 INFO L78 Accepts]: Start accepts. Automaton has 207664 states and 250572 transitions. Word has length 407 [2018-09-10 10:34:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:34:07,675 INFO L480 AbstractCegarLoop]: Abstraction has 207664 states and 250572 transitions. [2018-09-10 10:34:07,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:34:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 207664 states and 250572 transitions. [2018-09-10 10:34:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-09-10 10:34:07,837 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:34:07,838 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:34:07,838 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:34:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1080423061, now seen corresponding path program 1 times [2018-09-10 10:34:07,838 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:34:07,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:34:07,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:34:07,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:34:07,839 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:34:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:34:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 285 proven. 121 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:34:09,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:34:09,509 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:34:09,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:34:09,528 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:34:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:34:09,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:34:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-09-10 10:34:10,003 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:34:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 307 proven. 38 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-10 10:34:10,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:34:10,219 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:34:10,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:34:10,242 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:34:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:34:11,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:34:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-09-10 10:34:11,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:34:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 307 proven. 38 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-10 10:34:11,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:34:11,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 18 [2018-09-10 10:34:11,995 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:34:11,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 10:34:11,997 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 10:34:11,997 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:34:11,997 INFO L87 Difference]: Start difference. First operand 207664 states and 250572 transitions. Second operand 14 states. [2018-09-10 10:34:17,347 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-09-10 10:35:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:35:21,418 INFO L93 Difference]: Finished difference Result 2065915 states and 2643003 transitions. [2018-09-10 10:35:21,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-10 10:35:21,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 430 [2018-09-10 10:35:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown