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/Problem17_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:24:19,327 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:24:19,329 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:24:19,343 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:24:19,343 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:24:19,344 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:24:19,345 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:24:19,347 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:24:19,349 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:24:19,350 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:24:19,351 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:24:19,351 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:24:19,352 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:24:19,353 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:24:19,354 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:24:19,357 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:24:19,358 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:24:19,362 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:24:19,364 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:24:19,366 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:24:19,370 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:24:19,371 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:24:19,375 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:24:19,375 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:24:19,376 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:24:19,379 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:24:19,380 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:24:19,381 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:24:19,383 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:24:19,384 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:24:19,384 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:24:19,386 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:24:19,387 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:24:19,388 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:24:19,389 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:24:19,389 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:24:19,389 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 12:24:19,418 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:24:19,418 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:24:19,419 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:24:19,420 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:24:19,421 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:24:19,421 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:24:19,421 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:24:19,421 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:24:19,421 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:24:19,422 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:24:19,422 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:24:19,423 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:24:19,423 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:24:19,423 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:24:19,423 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:24:19,424 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:24:19,424 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:24:19,424 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:24:19,424 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:24:19,426 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:24:19,426 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:24:19,426 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:24:19,426 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:24:19,427 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:24:19,427 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:24:19,427 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:24:19,427 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:24:19,428 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:24:19,428 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:24:19,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:24:19,428 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:24:19,428 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:24:19,428 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:24:19,492 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:24:19,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:24:19,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:24:19,512 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:24:19,513 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:24:19,514 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-09-10 12:24:19,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee399c1b/4ddb2e46cd4546d297a5c1163803c33a/FLAGebfebc68c [2018-09-10 12:24:20,287 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:24:20,288 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-09-10 12:24:20,319 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee399c1b/4ddb2e46cd4546d297a5c1163803c33a/FLAGebfebc68c [2018-09-10 12:24:20,341 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee399c1b/4ddb2e46cd4546d297a5c1163803c33a [2018-09-10 12:24:20,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:24:20,358 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:24:20,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:24:20,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:24:20,367 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:24:20,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:24:20" (1/1) ... [2018-09-10 12:24:20,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac2b2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:20, skipping insertion in model container [2018-09-10 12:24:20,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:24:20" (1/1) ... [2018-09-10 12:24:20,667 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:24:21,448 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:24:21,469 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:24:21,875 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:24:22,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22 WrapperNode [2018-09-10 12:24:22,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:24:22,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:24:22,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:24:22,090 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:24:22,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:22,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:22,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:24:22,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:24:22,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:24:22,382 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:24:22,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:22,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:22,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:22,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:23,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:23,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:23,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (1/1) ... [2018-09-10 12:24:23,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:24:23,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:24:23,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:24:23,186 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:24:23,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (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 12:24:23,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:24:23,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:24:23,253 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 12:24:23,253 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 12:24:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:24:23,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:24:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:24:23,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:24:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:24:23,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:24:33,235 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:24:33,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:24:33 BoogieIcfgContainer [2018-09-10 12:24:33,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:24:33,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:24:33,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:24:33,241 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:24:33,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:24:20" (1/3) ... [2018-09-10 12:24:33,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b7eacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:24:33, skipping insertion in model container [2018-09-10 12:24:33,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:22" (2/3) ... [2018-09-10 12:24:33,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b7eacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:24:33, skipping insertion in model container [2018-09-10 12:24:33,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:24:33" (3/3) ... [2018-09-10 12:24:33,244 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11_true-unreach-call.c [2018-09-10 12:24:33,254 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:24:33,262 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:24:33,319 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:24:33,320 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:24:33,320 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:24:33,320 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:24:33,321 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:24:33,321 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:24:33,321 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:24:33,321 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:24:33,321 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:24:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-09-10 12:24:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-10 12:24:33,365 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:24:33,366 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] [2018-09-10 12:24:33,367 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 12:24:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash 922138129, now seen corresponding path program 1 times [2018-09-10 12:24:33,374 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:24:33,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:33,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:33,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:33,426 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:24:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:33,897 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 12:24:33,899 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:24:33,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:24:33,900 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:24:33,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:24:33,922 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:24:33,923 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:24:33,926 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-09-10 12:24:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:24:45,466 INFO L93 Difference]: Finished difference Result 2139 states and 3961 transitions. [2018-09-10 12:24:45,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:24:45,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-09-10 12:24:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:24:45,503 INFO L225 Difference]: With dead ends: 2139 [2018-09-10 12:24:45,503 INFO L226 Difference]: Without dead ends: 1529 [2018-09-10 12:24:45,513 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:24:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-09-10 12:24:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2018-09-10 12:24:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2018-09-10 12:24:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2413 transitions. [2018-09-10 12:24:45,683 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2413 transitions. Word has length 63 [2018-09-10 12:24:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:24:45,684 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 2413 transitions. [2018-09-10 12:24:45,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:24:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2413 transitions. [2018-09-10 12:24:45,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-10 12:24:45,698 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:24:45,699 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, 1, 1, 1, 1, 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 12:24:45,699 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 12:24:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1586127425, now seen corresponding path program 1 times [2018-09-10 12:24:45,700 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:24:45,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:45,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:45,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:45,704 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:24:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:24:46,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:24:46,157 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 12:24:46,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:46,176 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:24:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:46,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:24:50,081 WARN L175 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 32 [2018-09-10 12:24:52,070 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2018-09-10 12:24:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:24:52,229 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:24:52,366 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-10 12:24:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:24:52,662 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:24:52,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-09-10 12:24:52,663 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:24:52,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:24:52,664 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:24:52,665 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-09-10 12:24:52,665 INFO L87 Difference]: Start difference. First operand 1527 states and 2413 transitions. Second operand 3 states. [2018-09-10 12:25:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:01,290 INFO L93 Difference]: Finished difference Result 4361 states and 7034 transitions. [2018-09-10 12:25:01,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:25:01,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2018-09-10 12:25:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:01,313 INFO L225 Difference]: With dead ends: 4361 [2018-09-10 12:25:01,313 INFO L226 Difference]: Without dead ends: 2840 [2018-09-10 12:25:01,322 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-09-10 12:25:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-09-10 12:25:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2835. [2018-09-10 12:25:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2835 states. [2018-09-10 12:25:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 4434 transitions. [2018-09-10 12:25:01,430 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 4434 transitions. Word has length 138 [2018-09-10 12:25:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:01,431 INFO L480 AbstractCegarLoop]: Abstraction has 2835 states and 4434 transitions. [2018-09-10 12:25:01,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:25:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 4434 transitions. [2018-09-10 12:25:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-10 12:25:01,440 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:01,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:01,441 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 12:25:01,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1346987937, now seen corresponding path program 1 times [2018-09-10 12:25:01,441 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:01,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:01,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:01,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:01,443 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:25:01,727 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:25:01,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:25:01,728 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:01,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:25:01,729 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:25:01,729 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:25:01,729 INFO L87 Difference]: Start difference. First operand 2835 states and 4434 transitions. Second operand 6 states. [2018-09-10 12:25:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:09,748 INFO L93 Difference]: Finished difference Result 8423 states and 13679 transitions. [2018-09-10 12:25:09,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:25:09,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2018-09-10 12:25:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:09,791 INFO L225 Difference]: With dead ends: 8423 [2018-09-10 12:25:09,792 INFO L226 Difference]: Without dead ends: 5594 [2018-09-10 12:25:09,806 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 12:25:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2018-09-10 12:25:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 5550. [2018-09-10 12:25:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5550 states. [2018-09-10 12:25:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 8251 transitions. [2018-09-10 12:25:10,122 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 8251 transitions. Word has length 179 [2018-09-10 12:25:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:10,123 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 8251 transitions. [2018-09-10 12:25:10,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:25:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 8251 transitions. [2018-09-10 12:25:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-10 12:25:10,135 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:10,135 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:25:10,135 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 12:25:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash 926802588, now seen corresponding path program 1 times [2018-09-10 12:25:10,137 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:10,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:10,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:10,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:10,138 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:25:10,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:10,473 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 12:25:10,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:10,488 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:10,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:25:10,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:25:11,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:11,161 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 12:25:11,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:11,180 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:11,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-10 12:25:11,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-10 12:25:11,925 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-10 12:25:11,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-09-10 12:25:11,925 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:11,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:25:11,926 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:25:11,927 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:25:11,928 INFO L87 Difference]: Start difference. First operand 5550 states and 8251 transitions. Second operand 5 states. [2018-09-10 12:25:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:17,253 INFO L93 Difference]: Finished difference Result 13329 states and 19833 transitions. [2018-09-10 12:25:17,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:25:17,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 231 [2018-09-10 12:25:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:17,293 INFO L225 Difference]: With dead ends: 13329 [2018-09-10 12:25:17,293 INFO L226 Difference]: Without dead ends: 7785 [2018-09-10 12:25:17,315 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 912 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:25:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2018-09-10 12:25:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7785. [2018-09-10 12:25:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7785 states. [2018-09-10 12:25:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 10165 transitions. [2018-09-10 12:25:17,480 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 10165 transitions. Word has length 231 [2018-09-10 12:25:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:17,481 INFO L480 AbstractCegarLoop]: Abstraction has 7785 states and 10165 transitions. [2018-09-10 12:25:17,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:25:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 10165 transitions. [2018-09-10 12:25:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-10 12:25:17,490 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:17,491 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:25:17,491 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 12:25:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1785870625, now seen corresponding path program 1 times [2018-09-10 12:25:17,491 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:17,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:17,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:17,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:17,493 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 112 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:25:17,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:17,883 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:25:17,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:17,893 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:17,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-10 12:25:18,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:18,392 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-09-10 12:25:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 112 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:25:18,704 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:25:18,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-10 12:25:18,704 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:18,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:25:18,705 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:25:18,705 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:25:18,705 INFO L87 Difference]: Start difference. First operand 7785 states and 10165 transitions. Second operand 5 states. [2018-09-10 12:25:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:28,743 INFO L93 Difference]: Finished difference Result 19165 states and 24588 transitions. [2018-09-10 12:25:28,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:25:28,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2018-09-10 12:25:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:28,788 INFO L225 Difference]: With dead ends: 19165 [2018-09-10 12:25:28,788 INFO L226 Difference]: Without dead ends: 10949 [2018-09-10 12:25:28,819 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:25:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10949 states. [2018-09-10 12:25:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 9761. [2018-09-10 12:25:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9761 states. [2018-09-10 12:25:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 12458 transitions. [2018-09-10 12:25:29,055 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 12458 transitions. Word has length 250 [2018-09-10 12:25:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:29,055 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 12458 transitions. [2018-09-10 12:25:29,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:25:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 12458 transitions. [2018-09-10 12:25:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-10 12:25:29,071 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:29,072 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:25:29,072 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 12:25:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash 213163218, now seen corresponding path program 1 times [2018-09-10 12:25:29,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:29,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:29,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:29,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:29,075 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:29,417 WARN L175 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:25:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 129 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-10 12:25:30,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:30,216 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 12:25:30,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:30,243 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:30,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:25:30,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:25:30,585 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:25:30,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 12:25:30,585 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:30,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:25:30,586 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:25:30,586 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:25:30,586 INFO L87 Difference]: Start difference. First operand 9761 states and 12458 transitions. Second operand 3 states. [2018-09-10 12:25:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:35,757 INFO L93 Difference]: Finished difference Result 19509 states and 25029 transitions. [2018-09-10 12:25:35,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:25:35,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 267 [2018-09-10 12:25:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:35,789 INFO L225 Difference]: With dead ends: 19509 [2018-09-10 12:25:35,789 INFO L226 Difference]: Without dead ends: 10188 [2018-09-10 12:25:35,819 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 534 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:25:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2018-09-10 12:25:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 9744. [2018-09-10 12:25:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9744 states. [2018-09-10 12:25:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9744 states to 9744 states and 11862 transitions. [2018-09-10 12:25:35,980 INFO L78 Accepts]: Start accepts. Automaton has 9744 states and 11862 transitions. Word has length 267 [2018-09-10 12:25:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:35,980 INFO L480 AbstractCegarLoop]: Abstraction has 9744 states and 11862 transitions. [2018-09-10 12:25:35,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:25:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 9744 states and 11862 transitions. [2018-09-10 12:25:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-09-10 12:25:35,993 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:35,993 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:25:35,993 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 12:25:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1087623439, now seen corresponding path program 1 times [2018-09-10 12:25:35,994 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:35,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:35,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:35,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:35,995 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:36,513 WARN L175 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-09-10 12:25:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 174 proven. 214 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-10 12:25:36,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:36,955 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 12:25:36,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:36,965 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:37,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-10 12:25:37,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 246 proven. 76 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-10 12:25:37,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:37,826 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:25:37,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:37,843 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:38,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 264 proven. 2 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-09-10 12:25:39,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:39,320 WARN L175 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-09-10 12:25:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 176 proven. 142 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-10 12:25:39,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:25:39,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 18 [2018-09-10 12:25:39,777 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:25:39,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-10 12:25:39,778 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-10 12:25:39,779 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:25:39,779 INFO L87 Difference]: Start difference. First operand 9744 states and 11862 transitions. Second operand 12 states. [2018-09-10 12:26:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:08,934 INFO L93 Difference]: Finished difference Result 26218 states and 33165 transitions. [2018-09-10 12:26:08,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-10 12:26:08,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 325 [2018-09-10 12:26:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:08,977 INFO L225 Difference]: With dead ends: 26218 [2018-09-10 12:26:08,978 INFO L226 Difference]: Without dead ends: 12326 [2018-09-10 12:26:09,045 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1420 GetRequests, 1346 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=921, Invalid=4481, Unknown=0, NotChecked=0, Total=5402 [2018-09-10 12:26:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2018-09-10 12:26:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 11215. [2018-09-10 12:26:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11215 states. [2018-09-10 12:26:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11215 states to 11215 states and 12583 transitions. [2018-09-10 12:26:09,304 INFO L78 Accepts]: Start accepts. Automaton has 11215 states and 12583 transitions. Word has length 325 [2018-09-10 12:26:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:09,305 INFO L480 AbstractCegarLoop]: Abstraction has 11215 states and 12583 transitions. [2018-09-10 12:26:09,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-10 12:26:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 11215 states and 12583 transitions. [2018-09-10 12:26:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-10 12:26:09,319 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:09,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:09,320 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 12:26:09,321 INFO L82 PathProgramCache]: Analyzing trace with hash 435564165, now seen corresponding path program 1 times [2018-09-10 12:26:09,321 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:09,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:09,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:09,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:09,322 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:10,128 WARN L175 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-09-10 12:26:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:26:10,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:10,472 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:26:10,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:10,481 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:10,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:14,744 WARN L175 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 38 [2018-09-10 12:26:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:26:14,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:15,136 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2018-09-10 12:26:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:26:18,116 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:26:18,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-10 12:26:18,117 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:26:18,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:26:18,118 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:26:18,118 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:26:18,118 INFO L87 Difference]: Start difference. First operand 11215 states and 12583 transitions. Second operand 6 states. [2018-09-10 12:26:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:39,618 INFO L93 Difference]: Finished difference Result 32874 states and 37088 transitions. [2018-09-10 12:26:39,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:26:39,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 411 [2018-09-10 12:26:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:39,696 INFO L225 Difference]: With dead ends: 32874 [2018-09-10 12:26:39,696 INFO L226 Difference]: Without dead ends: 19881 [2018-09-10 12:26:39,722 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 816 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:26:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19881 states. [2018-09-10 12:26:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19881 to 18545. [2018-09-10 12:26:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18545 states. [2018-09-10 12:26:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18545 states to 18545 states and 20930 transitions. [2018-09-10 12:26:40,082 INFO L78 Accepts]: Start accepts. Automaton has 18545 states and 20930 transitions. Word has length 411 [2018-09-10 12:26:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:40,083 INFO L480 AbstractCegarLoop]: Abstraction has 18545 states and 20930 transitions. [2018-09-10 12:26:40,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:26:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 18545 states and 20930 transitions. [2018-09-10 12:26:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-09-10 12:26:40,097 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:40,097 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:26:40,098 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 12:26:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash -411806963, now seen corresponding path program 1 times [2018-09-10 12:26:40,099 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:40,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:40,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:40,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:40,100 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:26:40,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:40,569 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 12:26:40,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:40,580 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:40,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:26:40,848 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:26:41,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:41,288 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 12:26:41,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:41,312 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:41,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:26:41,909 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:26:42,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:26:42,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-09-10 12:26:42,552 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:26:42,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:26:42,555 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:26:42,556 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:26:42,556 INFO L87 Difference]: Start difference. First operand 18545 states and 20930 transitions. Second operand 6 states. [2018-09-10 12:26:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:57,131 INFO L93 Difference]: Finished difference Result 42724 states and 48937 transitions. [2018-09-10 12:26:57,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:26:57,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 419 [2018-09-10 12:26:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:57,183 INFO L225 Difference]: With dead ends: 42724 [2018-09-10 12:26:57,183 INFO L226 Difference]: Without dead ends: 24624 [2018-09-10 12:26:57,219 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1690 GetRequests, 1677 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:26:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24624 states. [2018-09-10 12:26:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24624 to 21017. [2018-09-10 12:26:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21017 states. [2018-09-10 12:26:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 23729 transitions. [2018-09-10 12:26:57,586 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 23729 transitions. Word has length 419 [2018-09-10 12:26:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:57,587 INFO L480 AbstractCegarLoop]: Abstraction has 21017 states and 23729 transitions. [2018-09-10 12:26:57,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:26:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 23729 transitions. [2018-09-10 12:26:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-09-10 12:26:57,606 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:57,607 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-09-10 12:26:57,607 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 12:26:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash -268327054, now seen corresponding path program 1 times [2018-09-10 12:26:57,608 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:57,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:57,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:57,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:57,610 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2018-09-10 12:26:58,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:58,037 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 12:26:58,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:58,267 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:58,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-09-10 12:26:58,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 246 proven. 8 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-09-10 12:26:59,396 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:26:59,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-09-10 12:26:59,397 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:26:59,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:26:59,398 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:26:59,398 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:26:59,398 INFO L87 Difference]: Start difference. First operand 21017 states and 23729 transitions. Second operand 3 states. [2018-09-10 12:27:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:27:02,464 INFO L93 Difference]: Finished difference Result 41557 states and 47028 transitions. [2018-09-10 12:27:02,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:27:02,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2018-09-10 12:27:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:27:02,509 INFO L225 Difference]: With dead ends: 41557 [2018-09-10 12:27:02,509 INFO L226 Difference]: Without dead ends: 20982 [2018-09-10 12:27:02,537 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 930 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:27:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20982 states. [2018-09-10 12:27:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20982 to 20981. [2018-09-10 12:27:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20981 states. [2018-09-10 12:27:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20981 states to 20981 states and 23638 transitions. [2018-09-10 12:27:02,860 INFO L78 Accepts]: Start accepts. Automaton has 20981 states and 23638 transitions. Word has length 467 [2018-09-10 12:27:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:27:02,861 INFO L480 AbstractCegarLoop]: Abstraction has 20981 states and 23638 transitions. [2018-09-10 12:27:02,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:27:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 20981 states and 23638 transitions. [2018-09-10 12:27:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2018-09-10 12:27:02,881 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:27:02,881 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:27:02,881 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 12:27:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1714132532, now seen corresponding path program 1 times [2018-09-10 12:27:02,882 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:27:02,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:02,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:02,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:02,883 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:27:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2018-09-10 12:27:03,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:03,206 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 12:27:03,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:03,214 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:03,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-09-10 12:27:03,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2018-09-10 12:27:03,886 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:27:03,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-09-10 12:27:03,887 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:27:03,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:27:03,888 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:27:03,888 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:27:03,888 INFO L87 Difference]: Start difference. First operand 20981 states and 23638 transitions. Second operand 3 states. [2018-09-10 12:27:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:27:12,141 INFO L93 Difference]: Finished difference Result 45919 states and 52236 transitions. [2018-09-10 12:27:12,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:27:12,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2018-09-10 12:27:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:27:12,201 INFO L225 Difference]: With dead ends: 45919 [2018-09-10 12:27:12,202 INFO L226 Difference]: Without dead ends: 25383 [2018-09-10 12:27:12,237 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 977 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 12:27:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25383 states. [2018-09-10 12:27:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25383 to 24944. [2018-09-10 12:27:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24944 states. [2018-09-10 12:27:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24944 states to 24944 states and 28296 transitions. [2018-09-10 12:27:12,631 INFO L78 Accepts]: Start accepts. Automaton has 24944 states and 28296 transitions. Word has length 488 [2018-09-10 12:27:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:27:12,632 INFO L480 AbstractCegarLoop]: Abstraction has 24944 states and 28296 transitions. [2018-09-10 12:27:12,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:27:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24944 states and 28296 transitions. [2018-09-10 12:27:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2018-09-10 12:27:12,648 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:27:12,648 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:27:12,649 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 12:27:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1633896520, now seen corresponding path program 1 times [2018-09-10 12:27:12,649 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:27:12,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:12,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:12,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:12,650 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:27:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2018-09-10 12:27:13,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:13,126 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:27:13,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:13,136 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:13,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 445 proven. 0 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2018-09-10 12:27:13,435 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2018-09-10 12:27:13,818 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:27:13,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-09-10 12:27:13,819 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:27:13,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:27:13,819 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:27:13,820 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:27:13,821 INFO L87 Difference]: Start difference. First operand 24944 states and 28296 transitions. Second operand 3 states. [2018-09-10 12:27:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:27:21,144 INFO L93 Difference]: Finished difference Result 63841 states and 73681 transitions. [2018-09-10 12:27:21,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:27:21,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 540 [2018-09-10 12:27:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:27:21,242 INFO L225 Difference]: With dead ends: 63841 [2018-09-10 12:27:21,242 INFO L226 Difference]: Without dead ends: 39342 [2018-09-10 12:27:21,281 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1080 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:27:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39342 states. [2018-09-10 12:27:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39342 to 38872. [2018-09-10 12:27:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38872 states. [2018-09-10 12:27:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38872 states to 38872 states and 44611 transitions. [2018-09-10 12:27:21,824 INFO L78 Accepts]: Start accepts. Automaton has 38872 states and 44611 transitions. Word has length 540 [2018-09-10 12:27:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:27:21,824 INFO L480 AbstractCegarLoop]: Abstraction has 38872 states and 44611 transitions. [2018-09-10 12:27:21,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:27:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 38872 states and 44611 transitions. [2018-09-10 12:27:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-09-10 12:27:21,849 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:27:21,850 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 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] [2018-09-10 12:27:21,850 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 12:27:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1712270891, now seen corresponding path program 1 times [2018-09-10 12:27:21,850 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:27:21,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:21,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:21,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:21,851 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:27:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 263 proven. 446 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-10 12:27:23,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:23,869 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:27:23,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:23,876 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:24,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:28,491 WARN L175 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-09-10 12:27:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 550 proven. 55 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:27:29,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:29,813 WARN L175 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-09-10 12:27:29,992 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-09-10 12:27:30,319 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 108 [2018-09-10 12:27:31,617 WARN L175 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2018-09-10 12:27:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 239 proven. 470 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-10 12:27:33,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:33,180 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:27:33,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:33,196 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:33,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 518 proven. 87 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:27:34,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 237 proven. 472 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-10 12:27:36,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:27:36,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10, 10, 11] total 46 [2018-09-10 12:27:36,224 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:27:36,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-10 12:27:36,226 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-10 12:27:36,226 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2018-09-10 12:27:36,227 INFO L87 Difference]: Start difference. First operand 38872 states and 44611 transitions. Second operand 23 states. [2018-09-10 12:27:37,489 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2018-09-10 12:27:47,170 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2018-09-10 12:27:51,221 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2018-09-10 12:28:05,295 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 Received shutdown request... [2018-09-10 12:28:15,851 WARN L183 SmtUtils]: Removed 7 from assertion stack [2018-09-10 12:28:15,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-10 12:28:15,852 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:28:15,858 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:28:15,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:28:15 BoogieIcfgContainer [2018-09-10 12:28:15,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:28:15,860 INFO L168 Benchmark]: Toolchain (without parser) took 235504.78 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-10 12:28:15,861 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:28:15,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1729.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:15,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 292.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:15,865 INFO L168 Benchmark]: Boogie Preprocessor took 803.83 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 945.3 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:15,866 INFO L168 Benchmark]: RCFGBuilder took 10050.40 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 487.1 MB). Peak memory consumption was 487.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:15,869 INFO L168 Benchmark]: TraceAbstraction took 222621.71 ms. Allocated memory was 2.5 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -612.1 MB). Peak memory consumption was 916.2 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:15,879 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1729.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 292.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 803.83 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 945.3 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10050.40 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 487.1 MB). Peak memory consumption was 487.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222621.71 ms. Allocated memory was 2.5 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -612.1 MB). Peak memory consumption was 916.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 176]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 176). Cancelled while BasicCegarLoop was constructing difference of abstraction (38872states) and FLOYD_HOARE automaton (currently 72 states, 23 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 21. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 222.5s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 173.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4326 SDtfs, 29636 SDslu, 3826 SDs, 0 SdLazy, 53102 SolverSat, 9108 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 148.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11642 GetRequests, 11348 SyntacticMatches, 36 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 5386 ImplicationChecksByTransitivity, 31.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38872occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 8647 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 39.0s InterpolantComputationTime, 9999 NumberOfCodeBlocks, 9999 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 15607 ConstructedInterpolants, 513 QuantifiedInterpolants, 33450534 SizeOfPredicates, 56 NumberOfNonLiveVariables, 9003 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 43 InterpolantComputations, 11 PerfectInterpolantSequences, 14098/16529 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label11_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-28-15-907.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label11_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-28-15-907.csv Completed graceful shutdown