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/Problem14_label17_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:02:24,353 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:02:24,357 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:02:24,374 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:02:24,374 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:02:24,375 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:02:24,376 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:02:24,379 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:02:24,381 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:02:24,382 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:02:24,385 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:02:24,385 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:02:24,386 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:02:24,387 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:02:24,388 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:02:24,389 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:02:24,390 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:02:24,392 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:02:24,393 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:02:24,395 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:02:24,396 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:02:24,397 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:02:24,400 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:02:24,400 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:02:24,400 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:02:24,401 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:02:24,402 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:02:24,403 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:02:24,404 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:02:24,405 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:02:24,405 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:02:24,406 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:02:24,406 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:02:24,406 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:02:24,408 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:02:24,408 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:02:24,409 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 12:02:24,434 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:02:24,434 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:02:24,435 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:02:24,435 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:02:24,435 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:02:24,436 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:02:24,436 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:02:24,436 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:02:24,436 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:02:24,436 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:02:24,437 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:02:24,437 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:02:24,437 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:02:24,438 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:02:24,438 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:02:24,438 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:02:24,438 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:02:24,438 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:02:24,439 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:02:24,439 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:02:24,439 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:02:24,439 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:02:24,439 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:02:24,440 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:02:24,440 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:02:24,440 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:02:24,440 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:02:24,441 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:02:24,441 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:02:24,441 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:02:24,441 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:02:24,441 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:02:24,441 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:02:24,490 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:02:24,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:02:24,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:02:24,519 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:02:24,520 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:02:24,520 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17_true-unreach-call_false-termination.c [2018-09-10 12:02:24,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8180d659e/3fbfaae2bfad477d8fe1292d5fa5ed68/FLAG37693a60f [2018-09-10 12:02:25,164 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:02:25,165 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label17_true-unreach-call_false-termination.c [2018-09-10 12:02:25,194 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8180d659e/3fbfaae2bfad477d8fe1292d5fa5ed68/FLAG37693a60f [2018-09-10 12:02:25,219 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8180d659e/3fbfaae2bfad477d8fe1292d5fa5ed68 [2018-09-10 12:02:25,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:02:25,235 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:02:25,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:02:25,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:02:25,246 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:02:25,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:02:25" (1/1) ... [2018-09-10 12:02:25,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5d1adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:25, skipping insertion in model container [2018-09-10 12:02:25,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:02:25" (1/1) ... [2018-09-10 12:02:25,461 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:02:25,825 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:02:25,846 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:02:26,011 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:02:26,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26 WrapperNode [2018-09-10 12:02:26,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:02:26,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:02:26,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:02:26,058 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:02:26,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:02:26,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:02:26,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:02:26,208 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:02:26,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (1/1) ... [2018-09-10 12:02:26,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:02:26,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:02:26,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:02:26,480 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:02:26,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (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 12:02:26,564 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:02:26,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:02:26,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:02:26,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:02:26,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:02:26,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:02:26,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:02:26,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:02:30,373 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:02:30,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:02:30 BoogieIcfgContainer [2018-09-10 12:02:30,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:02:30,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:02:30,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:02:30,379 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:02:30,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:02:25" (1/3) ... [2018-09-10 12:02:30,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9e3076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:02:30, skipping insertion in model container [2018-09-10 12:02:30,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:02:26" (2/3) ... [2018-09-10 12:02:30,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9e3076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:02:30, skipping insertion in model container [2018-09-10 12:02:30,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:02:30" (3/3) ... [2018-09-10 12:02:30,383 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label17_true-unreach-call_false-termination.c [2018-09-10 12:02:30,393 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:02:30,403 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:02:30,469 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:02:30,470 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:02:30,471 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:02:30,471 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:02:30,471 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:02:30,471 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:02:30,472 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:02:30,472 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:02:30,472 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:02:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-10 12:02:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-10 12:02:30,516 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:30,517 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 12:02:30,518 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1045209199, now seen corresponding path program 1 times [2018-09-10 12:02:30,527 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:30,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:30,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:30,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:30,575 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:30,975 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:02:31,013 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 12:02:31,015 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:02:31,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:02:31,016 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:02:31,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:02:31,038 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:02:31,039 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:02:31,042 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-09-10 12:02:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:32,913 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-09-10 12:02:32,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:02:32,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2018-09-10 12:02:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:32,939 INFO L225 Difference]: With dead ends: 691 [2018-09-10 12:02:32,939 INFO L226 Difference]: Without dead ends: 434 [2018-09-10 12:02:32,950 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:02:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-10 12:02:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-09-10 12:02:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-10 12:02:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 755 transitions. [2018-09-10 12:02:33,062 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 755 transitions. Word has length 63 [2018-09-10 12:02:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:33,063 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 755 transitions. [2018-09-10 12:02:33,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:02:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 755 transitions. [2018-09-10 12:02:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-10 12:02:33,079 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:33,079 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] [2018-09-10 12:02:33,080 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:33,080 INFO L82 PathProgramCache]: Analyzing trace with hash -843995874, now seen corresponding path program 1 times [2018-09-10 12:02:33,080 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:33,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:33,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:33,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:33,084 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:33,487 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 12:02:33,488 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:02:33,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:02:33,488 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:02:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:02:33,491 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:02:33,491 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:02:33,491 INFO L87 Difference]: Start difference. First operand 434 states and 755 transitions. Second operand 6 states. [2018-09-10 12:02:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:36,295 INFO L93 Difference]: Finished difference Result 1254 states and 2256 transitions. [2018-09-10 12:02:36,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:02:36,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-09-10 12:02:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:36,309 INFO L225 Difference]: With dead ends: 1254 [2018-09-10 12:02:36,310 INFO L226 Difference]: Without dead ends: 826 [2018-09-10 12:02:36,313 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 12:02:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2018-09-10 12:02:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 812. [2018-09-10 12:02:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-09-10 12:02:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1377 transitions. [2018-09-10 12:02:36,381 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1377 transitions. Word has length 143 [2018-09-10 12:02:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:36,382 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 1377 transitions. [2018-09-10 12:02:36,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:02:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1377 transitions. [2018-09-10 12:02:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-10 12:02:36,392 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:36,395 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] [2018-09-10 12:02:36,396 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:36,396 INFO L82 PathProgramCache]: Analyzing trace with hash 60564827, now seen corresponding path program 1 times [2018-09-10 12:02:36,396 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:36,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:36,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:36,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:36,398 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:36,699 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 12:02:36,699 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:02:36,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:02:36,700 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:02:36,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:02:36,701 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:02:36,701 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:02:36,701 INFO L87 Difference]: Start difference. First operand 812 states and 1377 transitions. Second operand 4 states. [2018-09-10 12:02:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:40,003 INFO L93 Difference]: Finished difference Result 1988 states and 3388 transitions. [2018-09-10 12:02:40,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:02:40,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2018-09-10 12:02:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:40,027 INFO L225 Difference]: With dead ends: 1988 [2018-09-10 12:02:40,028 INFO L226 Difference]: Without dead ends: 1182 [2018-09-10 12:02:40,034 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:02:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-09-10 12:02:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2018-09-10 12:02:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2018-09-10 12:02:40,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1751 transitions. [2018-09-10 12:02:40,089 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1751 transitions. Word has length 176 [2018-09-10 12:02:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:40,090 INFO L480 AbstractCegarLoop]: Abstraction has 1182 states and 1751 transitions. [2018-09-10 12:02:40,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:02:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1751 transitions. [2018-09-10 12:02:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-09-10 12:02:40,097 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:40,097 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] [2018-09-10 12:02:40,097 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1677378474, now seen corresponding path program 1 times [2018-09-10 12:02:40,098 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:40,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:40,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:40,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:40,099 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:40,632 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 12:02:40,632 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:02:40,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-10 12:02:40,632 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:02:40,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:02:40,633 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:02:40,634 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-10 12:02:40,634 INFO L87 Difference]: Start difference. First operand 1182 states and 1751 transitions. Second operand 7 states. [2018-09-10 12:02:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:44,950 INFO L93 Difference]: Finished difference Result 3896 states and 6173 transitions. [2018-09-10 12:02:44,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-10 12:02:44,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 229 [2018-09-10 12:02:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:44,974 INFO L225 Difference]: With dead ends: 3896 [2018-09-10 12:02:44,975 INFO L226 Difference]: Without dead ends: 2720 [2018-09-10 12:02:44,990 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:02:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2018-09-10 12:02:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2606. [2018-09-10 12:02:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2606 states. [2018-09-10 12:02:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3634 transitions. [2018-09-10 12:02:45,104 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3634 transitions. Word has length 229 [2018-09-10 12:02:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:45,105 INFO L480 AbstractCegarLoop]: Abstraction has 2606 states and 3634 transitions. [2018-09-10 12:02:45,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:02:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3634 transitions. [2018-09-10 12:02:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-09-10 12:02:45,123 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:45,123 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:45,123 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1669722159, now seen corresponding path program 1 times [2018-09-10 12:02:45,124 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:45,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:45,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:45,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:45,126 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 386 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:02:46,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:46,816 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 12:02:46,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:46,827 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:47,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-10 12:02:47,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 168 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:02:48,797 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:02:48,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 5] total 20 [2018-09-10 12:02:48,798 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:02:48,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:02:48,800 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:02:48,800 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:02:48,800 INFO L87 Difference]: Start difference. First operand 2606 states and 3634 transitions. Second operand 5 states. [2018-09-10 12:02:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:02:53,374 INFO L93 Difference]: Finished difference Result 8771 states and 12323 transitions. [2018-09-10 12:02:53,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:02:53,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 438 [2018-09-10 12:02:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:02:53,406 INFO L225 Difference]: With dead ends: 8771 [2018-09-10 12:02:53,406 INFO L226 Difference]: Without dead ends: 6171 [2018-09-10 12:02:53,422 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 870 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2018-09-10 12:02:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2018-09-10 12:02:53,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 6094. [2018-09-10 12:02:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6094 states. [2018-09-10 12:02:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6094 states to 6094 states and 8239 transitions. [2018-09-10 12:02:53,581 INFO L78 Accepts]: Start accepts. Automaton has 6094 states and 8239 transitions. Word has length 438 [2018-09-10 12:02:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:02:53,581 INFO L480 AbstractCegarLoop]: Abstraction has 6094 states and 8239 transitions. [2018-09-10 12:02:53,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:02:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6094 states and 8239 transitions. [2018-09-10 12:02:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-09-10 12:02:53,612 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:02:53,612 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, 3, 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] [2018-09-10 12:02:53,613 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:02:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash 594186879, now seen corresponding path program 1 times [2018-09-10 12:02:53,613 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:02:53,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:53,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:53,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:02:53,615 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:02:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:54,223 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:02:54,632 WARN L175 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-09-10 12:02:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 411 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-10 12:02:56,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:02:56,034 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 12:02:56,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:02:56,045 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:02:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:02:56,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:02:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-10 12:02:56,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:02:57,067 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-09-10 12:02:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 168 proven. 237 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:02:57,846 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:02:57,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [19, 6] total 25 [2018-09-10 12:02:57,846 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:02:57,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:02:57,847 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:02:57,847 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2018-09-10 12:02:57,848 INFO L87 Difference]: Start difference. First operand 6094 states and 8239 transitions. Second operand 6 states. [2018-09-10 12:03:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:00,520 INFO L93 Difference]: Finished difference Result 13040 states and 17539 transitions. [2018-09-10 12:03:00,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 12:03:00,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 462 [2018-09-10 12:03:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:00,553 INFO L225 Difference]: With dead ends: 13040 [2018-09-10 12:03:00,556 INFO L226 Difference]: Without dead ends: 6952 [2018-09-10 12:03:00,577 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 919 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2018-09-10 12:03:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6952 states. [2018-09-10 12:03:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6952 to 6889. [2018-09-10 12:03:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6889 states. [2018-09-10 12:03:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6889 states to 6889 states and 9190 transitions. [2018-09-10 12:03:00,734 INFO L78 Accepts]: Start accepts. Automaton has 6889 states and 9190 transitions. Word has length 462 [2018-09-10 12:03:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:00,735 INFO L480 AbstractCegarLoop]: Abstraction has 6889 states and 9190 transitions. [2018-09-10 12:03:00,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:03:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6889 states and 9190 transitions. [2018-09-10 12:03:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-09-10 12:03:00,775 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:00,776 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, 3, 3, 3, 3, 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] [2018-09-10 12:03:00,776 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1195688053, now seen corresponding path program 1 times [2018-09-10 12:03:00,776 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:00,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:00,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:00,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:00,778 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 317 proven. 399 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:03:02,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:02,058 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:02,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:02,067 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:02,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 559 proven. 53 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-10 12:03:02,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 239 proven. 477 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:03:03,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:03,762 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:03,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:03,778 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:04,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 559 proven. 53 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-10 12:03:04,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 239 proven. 477 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:03:06,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:06,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 8, 8] total 34 [2018-09-10 12:03:06,063 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:06,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-10 12:03:06,065 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-10 12:03:06,065 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2018-09-10 12:03:06,066 INFO L87 Difference]: Start difference. First operand 6889 states and 9190 transitions. Second operand 19 states. [2018-09-10 12:03:07,203 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2018-09-10 12:03:11,821 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-09-10 12:03:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:18,367 INFO L93 Difference]: Finished difference Result 14720 states and 19923 transitions. [2018-09-10 12:03:18,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-10 12:03:18,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 547 [2018-09-10 12:03:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:18,406 INFO L225 Difference]: With dead ends: 14720 [2018-09-10 12:03:18,406 INFO L226 Difference]: Without dead ends: 7624 [2018-09-10 12:03:18,436 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2188 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=789, Invalid=2871, Unknown=0, NotChecked=0, Total=3660 [2018-09-10 12:03:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2018-09-10 12:03:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 7238. [2018-09-10 12:03:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7238 states. [2018-09-10 12:03:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 8844 transitions. [2018-09-10 12:03:18,608 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 8844 transitions. Word has length 547 [2018-09-10 12:03:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:18,608 INFO L480 AbstractCegarLoop]: Abstraction has 7238 states and 8844 transitions. [2018-09-10 12:03:18,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-10 12:03:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 8844 transitions. [2018-09-10 12:03:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2018-09-10 12:03:18,642 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:18,643 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:18,643 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1329520345, now seen corresponding path program 1 times [2018-09-10 12:03:18,644 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:18,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:18,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:18,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:18,646 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:19,570 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:03:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 456 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:03:19,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:19,810 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 12:03:19,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:19,819 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:19,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 723 proven. 2 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-09-10 12:03:20,151 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 456 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:03:20,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:20,636 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:20,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:20,653 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:21,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 717 proven. 8 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2018-09-10 12:03:21,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 456 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-09-10 12:03:22,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:22,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 16 [2018-09-10 12:03:22,516 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:22,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:03:22,517 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:03:22,517 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:03:22,518 INFO L87 Difference]: Start difference. First operand 7238 states and 8844 transitions. Second operand 7 states. [2018-09-10 12:03:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:25,315 INFO L93 Difference]: Finished difference Result 17461 states and 21695 transitions. [2018-09-10 12:03:25,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:03:25,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 549 [2018-09-10 12:03:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:25,344 INFO L225 Difference]: With dead ends: 17461 [2018-09-10 12:03:25,344 INFO L226 Difference]: Without dead ends: 10412 [2018-09-10 12:03:25,362 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2216 GetRequests, 2185 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:03:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2018-09-10 12:03:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 10251. [2018-09-10 12:03:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10251 states. [2018-09-10 12:03:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10251 states to 10251 states and 11826 transitions. [2018-09-10 12:03:25,548 INFO L78 Accepts]: Start accepts. Automaton has 10251 states and 11826 transitions. Word has length 549 [2018-09-10 12:03:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:25,549 INFO L480 AbstractCegarLoop]: Abstraction has 10251 states and 11826 transitions. [2018-09-10 12:03:25,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:03:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 10251 states and 11826 transitions. [2018-09-10 12:03:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2018-09-10 12:03:25,598 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:25,599 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, 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, 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] [2018-09-10 12:03:25,599 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:25,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1289771895, now seen corresponding path program 1 times [2018-09-10 12:03:25,600 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:25,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:25,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:25,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:25,601 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:26,433 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-09-10 12:03:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 343 proven. 451 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:03:27,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:27,285 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:03:27,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:27,293 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:27,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 688 proven. 2 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-10 12:03:27,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:27,965 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2018-09-10 12:03:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 235 proven. 559 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:03:28,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:28,725 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:03:28,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:28,790 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:29,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:29,529 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 12:03:29,906 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:03:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 665 proven. 25 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-09-10 12:03:30,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:30,816 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-09-10 12:03:31,036 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2018-09-10 12:03:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 237 proven. 557 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-10 12:03:32,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:32,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 10, 11] total 40 [2018-09-10 12:03:32,683 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:32,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-10 12:03:32,687 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-10 12:03:32,688 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-09-10 12:03:32,688 INFO L87 Difference]: Start difference. First operand 10251 states and 11826 transitions. Second operand 19 states. [2018-09-10 12:03:34,919 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2018-09-10 12:03:36,458 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-09-10 12:03:38,828 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2018-09-10 12:03:40,726 WARN L175 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-09-10 12:03:41,591 WARN L175 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2018-09-10 12:03:41,992 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2018-09-10 12:03:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:47,125 INFO L93 Difference]: Finished difference Result 22570 states and 26472 transitions. [2018-09-10 12:03:47,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-10 12:03:47,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 573 [2018-09-10 12:03:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:47,160 INFO L225 Difference]: With dead ends: 22570 [2018-09-10 12:03:47,160 INFO L226 Difference]: Without dead ends: 12508 [2018-09-10 12:03:47,186 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2369 GetRequests, 2296 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=913, Invalid=4343, Unknown=0, NotChecked=0, Total=5256 [2018-09-10 12:03:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12508 states. [2018-09-10 12:03:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12508 to 11954. [2018-09-10 12:03:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11954 states. [2018-09-10 12:03:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11954 states to 11954 states and 13615 transitions. [2018-09-10 12:03:47,408 INFO L78 Accepts]: Start accepts. Automaton has 11954 states and 13615 transitions. Word has length 573 [2018-09-10 12:03:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:47,408 INFO L480 AbstractCegarLoop]: Abstraction has 11954 states and 13615 transitions. [2018-09-10 12:03:47,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-10 12:03:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11954 states and 13615 transitions. [2018-09-10 12:03:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2018-09-10 12:03:47,445 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:47,446 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:03:47,446 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:47,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1547925191, now seen corresponding path program 1 times [2018-09-10 12:03:47,448 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:47,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:47,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:47,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:47,449 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:48,042 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:03:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 611 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-09-10 12:03:49,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:49,133 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 12:03:49,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:49,141 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:49,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 952 proven. 2 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:03:49,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 605 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-09-10 12:03:50,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:50,501 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 12:03:50,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:50,518 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:03:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:50,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:03:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 744 proven. 210 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:03:51,489 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:03:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 316 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:03:52,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:03:52,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-10 12:03:52,804 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:03:52,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:03:52,806 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:03:52,806 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:03:52,806 INFO L87 Difference]: Start difference. First operand 11954 states and 13615 transitions. Second operand 13 states. [2018-09-10 12:03:56,810 WARN L175 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-09-10 12:03:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:03:57,008 INFO L93 Difference]: Finished difference Result 22792 states and 26590 transitions. [2018-09-10 12:03:57,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:03:57,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 634 [2018-09-10 12:03:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:03:57,062 INFO L225 Difference]: With dead ends: 22792 [2018-09-10 12:03:57,063 INFO L226 Difference]: Without dead ends: 10635 [2018-09-10 12:03:57,090 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2566 GetRequests, 2525 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:03:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2018-09-10 12:03:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 9929. [2018-09-10 12:03:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9929 states. [2018-09-10 12:03:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 11182 transitions. [2018-09-10 12:03:57,272 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 11182 transitions. Word has length 634 [2018-09-10 12:03:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:03:57,273 INFO L480 AbstractCegarLoop]: Abstraction has 9929 states and 11182 transitions. [2018-09-10 12:03:57,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:03:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 11182 transitions. [2018-09-10 12:03:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2018-09-10 12:03:57,293 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:03:57,293 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2018-09-10 12:03:57,294 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:03:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1467186075, now seen corresponding path program 2 times [2018-09-10 12:03:57,294 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:03:57,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:57,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:03:57,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:03:57,295 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:03:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:03:58,034 WARN L175 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:03:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 637 proven. 534 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-09-10 12:03:59,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:03:59,507 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 12:03:59,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:03:59,515 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:03:59,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:03:59,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:03:59,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 1004 proven. 2 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2018-09-10 12:04:00,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:00,285 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-10 12:04:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 631 proven. 112 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-09-10 12:04:01,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:01,095 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:01,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:04:01,111 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:04:01,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:04:01,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:04:01,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 989 proven. 17 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2018-09-10 12:04:02,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 310 proven. 748 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-09-10 12:04:05,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:05,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 10, 11] total 31 [2018-09-10 12:04:05,012 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:05,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-10 12:04:05,014 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-10 12:04:05,015 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2018-09-10 12:04:05,015 INFO L87 Difference]: Start difference. First operand 9929 states and 11182 transitions. Second operand 18 states. [2018-09-10 12:04:08,249 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-09-10 12:04:10,475 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2018-09-10 12:04:10,790 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-09-10 12:04:12,936 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2018-09-10 12:04:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:14,008 INFO L93 Difference]: Finished difference Result 22398 states and 25953 transitions. [2018-09-10 12:04:14,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-10 12:04:14,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 660 [2018-09-10 12:04:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:14,040 INFO L225 Difference]: With dead ends: 22398 [2018-09-10 12:04:14,040 INFO L226 Difference]: Without dead ends: 12658 [2018-09-10 12:04:14,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2717 GetRequests, 2638 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2018-09-10 12:04:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12658 states. [2018-09-10 12:04:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12658 to 12159. [2018-09-10 12:04:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12159 states. [2018-09-10 12:04:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12159 states to 12159 states and 13585 transitions. [2018-09-10 12:04:14,256 INFO L78 Accepts]: Start accepts. Automaton has 12159 states and 13585 transitions. Word has length 660 [2018-09-10 12:04:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:14,257 INFO L480 AbstractCegarLoop]: Abstraction has 12159 states and 13585 transitions. [2018-09-10 12:04:14,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-10 12:04:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 12159 states and 13585 transitions. [2018-09-10 12:04:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2018-09-10 12:04:14,282 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:14,283 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 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 12:04:14,283 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 789375800, now seen corresponding path program 1 times [2018-09-10 12:04:14,283 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:14,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:14,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 12:04:14,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:14,285 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 706 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-09-10 12:04:15,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:15,083 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 12:04:15,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:15,091 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:15,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-10 12:04:15,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 706 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-09-10 12:04:16,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:16,187 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:16,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:16,204 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:16,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-10 12:04:16,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 706 proven. 224 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2018-09-10 12:04:17,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:17,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-10 12:04:17,269 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:17,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:04:17,270 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:04:17,271 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:04:17,271 INFO L87 Difference]: Start difference. First operand 12159 states and 13585 transitions. Second operand 7 states. [2018-09-10 12:04:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:20,464 INFO L93 Difference]: Finished difference Result 31646 states and 39955 transitions. [2018-09-10 12:04:20,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 12:04:20,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 782 [2018-09-10 12:04:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:20,558 INFO L225 Difference]: With dead ends: 31646 [2018-09-10 12:04:20,558 INFO L226 Difference]: Without dead ends: 19676 [2018-09-10 12:04:20,638 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3144 GetRequests, 3129 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:04:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19676 states. [2018-09-10 12:04:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19676 to 19222. [2018-09-10 12:04:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19222 states. [2018-09-10 12:04:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19222 states to 19222 states and 22018 transitions. [2018-09-10 12:04:21,242 INFO L78 Accepts]: Start accepts. Automaton has 19222 states and 22018 transitions. Word has length 782 [2018-09-10 12:04:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:21,243 INFO L480 AbstractCegarLoop]: Abstraction has 19222 states and 22018 transitions. [2018-09-10 12:04:21,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:04:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 19222 states and 22018 transitions. [2018-09-10 12:04:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-09-10 12:04:21,278 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:21,279 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:04:21,279 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:21,279 INFO L82 PathProgramCache]: Analyzing trace with hash -119539882, now seen corresponding path program 1 times [2018-09-10 12:04:21,280 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:21,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:21,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:21,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:21,281 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:22,394 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-09-10 12:04:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 929 proven. 835 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-09-10 12:04:23,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:23,385 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:04:23,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:23,393 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:23,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1443 proven. 2 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-09-10 12:04:24,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 917 proven. 112 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-09-10 12:04:25,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:25,469 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:25,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:25,485 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:26,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1435 proven. 10 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-09-10 12:04:26,578 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 422 proven. 1075 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-09-10 12:04:28,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:28,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-09-10 12:04:28,197 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:28,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:04:28,199 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:04:28,200 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-09-10 12:04:28,200 INFO L87 Difference]: Start difference. First operand 19222 states and 22018 transitions. Second operand 17 states. [2018-09-10 12:04:30,019 WARN L175 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-09-10 12:04:37,289 WARN L175 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2018-09-10 12:04:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:37,578 INFO L93 Difference]: Finished difference Result 38485 states and 45953 transitions. [2018-09-10 12:04:37,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-10 12:04:37,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 823 [2018-09-10 12:04:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:37,661 INFO L225 Difference]: With dead ends: 38485 [2018-09-10 12:04:37,661 INFO L226 Difference]: Without dead ends: 18668 [2018-09-10 12:04:37,726 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3375 GetRequests, 3297 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1098, Invalid=4014, Unknown=0, NotChecked=0, Total=5112 [2018-09-10 12:04:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18668 states. [2018-09-10 12:04:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18668 to 18137. [2018-09-10 12:04:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18137 states. [2018-09-10 12:04:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18137 states to 18137 states and 20248 transitions. [2018-09-10 12:04:38,095 INFO L78 Accepts]: Start accepts. Automaton has 18137 states and 20248 transitions. Word has length 823 [2018-09-10 12:04:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:38,096 INFO L480 AbstractCegarLoop]: Abstraction has 18137 states and 20248 transitions. [2018-09-10 12:04:38,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:04:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 18137 states and 20248 transitions. [2018-09-10 12:04:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2018-09-10 12:04:38,134 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:38,134 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:38,135 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:38,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1073901905, now seen corresponding path program 1 times [2018-09-10 12:04:38,135 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:38,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:38,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:38,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:38,137 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 938 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-09-10 12:04:39,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:39,344 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:04:39,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:39,355 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:39,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 1827 proven. 2 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2018-09-10 12:04:40,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 938 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-09-10 12:04:40,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:40,694 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:40,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:40,709 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:41,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 1827 proven. 2 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2018-09-10 12:04:41,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 938 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-09-10 12:04:42,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:42,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-10 12:04:42,365 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:42,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:04:42,367 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:04:42,367 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:04:42,367 INFO L87 Difference]: Start difference. First operand 18137 states and 20248 transitions. Second operand 7 states. [2018-09-10 12:04:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:04:44,898 INFO L93 Difference]: Finished difference Result 37432 states and 42025 transitions. [2018-09-10 12:04:44,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:04:44,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 974 [2018-09-10 12:04:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:04:44,942 INFO L225 Difference]: With dead ends: 37432 [2018-09-10 12:04:44,942 INFO L226 Difference]: Without dead ends: 19484 [2018-09-10 12:04:44,984 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3911 GetRequests, 3896 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:04:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19484 states. [2018-09-10 12:04:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19484 to 19315. [2018-09-10 12:04:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19315 states. [2018-09-10 12:04:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19315 states to 19315 states and 21328 transitions. [2018-09-10 12:04:45,294 INFO L78 Accepts]: Start accepts. Automaton has 19315 states and 21328 transitions. Word has length 974 [2018-09-10 12:04:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:04:45,295 INFO L480 AbstractCegarLoop]: Abstraction has 19315 states and 21328 transitions. [2018-09-10 12:04:45,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:04:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 19315 states and 21328 transitions. [2018-09-10 12:04:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2018-09-10 12:04:45,335 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:04:45,335 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:04:45,336 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:04:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2115081840, now seen corresponding path program 1 times [2018-09-10 12:04:45,336 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:04:45,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:45,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:45,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:04:45,337 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:04:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:46,735 WARN L175 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-10 12:04:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 1047 proven. 1376 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2018-09-10 12:04:48,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:48,396 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:04:48,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:48,405 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:48,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 2086 proven. 2 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-09-10 12:04:49,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 1063 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-09-10 12:04:50,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:04:50,568 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:04:50,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:04:50,583 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:04:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:04:51,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:04:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 2081 proven. 25 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2018-09-10 12:04:51,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:04:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 1063 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-09-10 12:04:52,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:04:52,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6, 5, 5] total 22 [2018-09-10 12:04:52,839 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:04:52,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:04:52,840 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:04:52,841 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:04:52,841 INFO L87 Difference]: Start difference. First operand 19315 states and 21328 transitions. Second operand 17 states. [2018-09-10 12:04:54,762 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-09-10 12:04:54,937 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2018-09-10 12:04:56,719 WARN L175 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-09-10 12:04:57,758 WARN L175 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2018-09-10 12:05:00,029 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2018-09-10 12:05:00,698 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:05:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:02,485 INFO L93 Difference]: Finished difference Result 39157 states and 44549 transitions. [2018-09-10 12:05:02,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-10 12:05:02,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1030 [2018-09-10 12:05:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:02,556 INFO L225 Difference]: With dead ends: 39157 [2018-09-10 12:05:02,557 INFO L226 Difference]: Without dead ends: 20031 [2018-09-10 12:05:02,614 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4211 GetRequests, 4146 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=969, Invalid=3453, Unknown=0, NotChecked=0, Total=4422 [2018-09-10 12:05:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20031 states. [2018-09-10 12:05:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20031 to 19388. [2018-09-10 12:05:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19388 states. [2018-09-10 12:05:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19388 states to 19388 states and 21038 transitions. [2018-09-10 12:05:02,926 INFO L78 Accepts]: Start accepts. Automaton has 19388 states and 21038 transitions. Word has length 1030 [2018-09-10 12:05:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:02,926 INFO L480 AbstractCegarLoop]: Abstraction has 19388 states and 21038 transitions. [2018-09-10 12:05:02,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:05:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 19388 states and 21038 transitions. [2018-09-10 12:05:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2018-09-10 12:05:02,952 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:02,952 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:02,953 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1223734884, now seen corresponding path program 1 times [2018-09-10 12:05:02,953 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:02,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:02,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:02,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:02,954 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1708 proven. 230 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2018-09-10 12:05:04,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:04,430 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:04,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:04,438 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:04,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 2498 proven. 6 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2018-09-10 12:05:05,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1708 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2018-09-10 12:05:06,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:06,410 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 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:06,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:06,425 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:07,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 2498 proven. 6 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2018-09-10 12:05:07,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4002 backedges. 1708 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2018-09-10 12:05:08,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:08,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-09-10 12:05:08,652 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:08,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:05:08,654 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:05:08,654 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:05:08,654 INFO L87 Difference]: Start difference. First operand 19388 states and 21038 transitions. Second operand 9 states. [2018-09-10 12:05:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:12,871 INFO L93 Difference]: Finished difference Result 40954 states and 44558 transitions. [2018-09-10 12:05:12,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 12:05:12,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1151 [2018-09-10 12:05:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:12,914 INFO L225 Difference]: With dead ends: 40954 [2018-09-10 12:05:12,914 INFO L226 Difference]: Without dead ends: 21755 [2018-09-10 12:05:12,940 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4620 GetRequests, 4600 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:05:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21755 states. [2018-09-10 12:05:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21755 to 21072. [2018-09-10 12:05:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21072 states. [2018-09-10 12:05:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21072 states to 21072 states and 22912 transitions. [2018-09-10 12:05:13,213 INFO L78 Accepts]: Start accepts. Automaton has 21072 states and 22912 transitions. Word has length 1151 [2018-09-10 12:05:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:13,214 INFO L480 AbstractCegarLoop]: Abstraction has 21072 states and 22912 transitions. [2018-09-10 12:05:13,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:05:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 21072 states and 22912 transitions. [2018-09-10 12:05:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1509 [2018-09-10 12:05:13,257 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:13,257 INFO L376 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:13,258 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1808970433, now seen corresponding path program 1 times [2018-09-10 12:05:13,258 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:13,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:13,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:13,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:13,259 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:14,131 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-10 12:05:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 1316 proven. 3763 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-09-10 12:05:18,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:18,440 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:18,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:18,449 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:18,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 4013 proven. 2 refuted. 0 times theorem prover too weak. 2590 trivial. 0 not checked. [2018-09-10 12:05:19,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:20,176 WARN L175 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-10 12:05:20,496 WARN L175 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-10 12:05:21,258 WARN L175 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-09-10 12:05:21,497 WARN L175 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-10 12:05:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 1517 proven. 388 refuted. 0 times theorem prover too weak. 4700 trivial. 0 not checked. [2018-09-10 12:05:23,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:23,110 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 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:23,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:23,128 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:24,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 4664 proven. 24 refuted. 0 times theorem prover too weak. 1917 trivial. 0 not checked. [2018-09-10 12:05:26,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:27,131 WARN L175 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-09-10 12:05:27,254 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-09-10 12:05:27,362 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-09-10 12:05:27,927 WARN L175 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-09-10 12:05:29,264 WARN L175 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-09-10 12:05:29,415 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-09-10 12:05:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6605 backedges. 787 proven. 4057 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2018-09-10 12:05:34,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:05:34,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 13, 14] total 42 [2018-09-10 12:05:34,054 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:05:34,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-10 12:05:34,056 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-10 12:05:34,056 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2018-09-10 12:05:34,056 INFO L87 Difference]: Start difference. First operand 21072 states and 22912 transitions. Second operand 19 states. [2018-09-10 12:05:41,147 WARN L175 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-09-10 12:05:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:45,001 INFO L93 Difference]: Finished difference Result 39658 states and 43397 transitions. [2018-09-10 12:05:45,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-10 12:05:45,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1508 [2018-09-10 12:05:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:45,032 INFO L225 Difference]: With dead ends: 39658 [2018-09-10 12:05:45,032 INFO L226 Difference]: Without dead ends: 18775 [2018-09-10 12:05:45,068 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6131 GetRequests, 6040 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1009, Invalid=6131, Unknown=0, NotChecked=0, Total=7140 [2018-09-10 12:05:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2018-09-10 12:05:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 18602. [2018-09-10 12:05:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18602 states. [2018-09-10 12:05:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18602 states to 18602 states and 19902 transitions. [2018-09-10 12:05:45,299 INFO L78 Accepts]: Start accepts. Automaton has 18602 states and 19902 transitions. Word has length 1508 [2018-09-10 12:05:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:45,300 INFO L480 AbstractCegarLoop]: Abstraction has 18602 states and 19902 transitions. [2018-09-10 12:05:45,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-10 12:05:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 18602 states and 19902 transitions. [2018-09-10 12:05:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1628 [2018-09-10 12:05:45,331 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:45,332 INFO L376 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 7, 7, 7, 7, 7, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:45,332 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 459790037, now seen corresponding path program 1 times [2018-09-10 12:05:45,333 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:45,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:45,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:45,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:45,334 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:46,834 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-09-10 12:05:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 1796 proven. 1168 refuted. 0 times theorem prover too weak. 4903 trivial. 0 not checked. [2018-09-10 12:05:49,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:49,335 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:05:49,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:49,342 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:49,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 3025 proven. 2 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-09-10 12:05:50,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:51,153 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-09-10 12:05:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 1805 proven. 112 refuted. 0 times theorem prover too weak. 5950 trivial. 0 not checked. [2018-09-10 12:05:53,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:05:53,192 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 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:05:53,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:53,208 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:05:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:54,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:05:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 3007 proven. 20 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-09-10 12:05:56,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:05:56,383 WARN L175 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-09-10 12:06:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7867 backedges. 799 proven. 2280 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2018-09-10 12:06:00,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:00,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 30 [2018-09-10 12:06:00,759 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:00,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:06:00,761 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:06:00,762 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2018-09-10 12:06:00,762 INFO L87 Difference]: Start difference. First operand 18602 states and 19902 transitions. Second operand 17 states. [2018-09-10 12:06:06,496 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2018-09-10 12:06:10,299 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-09-10 12:06:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:10,708 INFO L93 Difference]: Finished difference Result 37066 states and 39727 transitions. [2018-09-10 12:06:10,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-10 12:06:10,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1627 [2018-09-10 12:06:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:10,740 INFO L225 Difference]: With dead ends: 37066 [2018-09-10 12:06:10,740 INFO L226 Difference]: Without dead ends: 18840 [2018-09-10 12:06:10,763 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6591 GetRequests, 6520 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=776, Invalid=4194, Unknown=0, NotChecked=0, Total=4970 [2018-09-10 12:06:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18840 states. [2018-09-10 12:06:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18840 to 18591. [2018-09-10 12:06:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18591 states. [2018-09-10 12:06:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18591 states to 18591 states and 19820 transitions. [2018-09-10 12:06:10,987 INFO L78 Accepts]: Start accepts. Automaton has 18591 states and 19820 transitions. Word has length 1627 [2018-09-10 12:06:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:10,988 INFO L480 AbstractCegarLoop]: Abstraction has 18591 states and 19820 transitions. [2018-09-10 12:06:10,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:06:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 18591 states and 19820 transitions. [2018-09-10 12:06:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1847 [2018-09-10 12:06:11,024 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:11,025 INFO L376 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 9, 8, 7, 7, 7, 7, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:11,025 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash 284852854, now seen corresponding path program 1 times [2018-09-10 12:06:11,026 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:11,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:11,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:11,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:11,027 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:12,150 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:06:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10584 backedges. 2179 proven. 2489 refuted. 0 times theorem prover too weak. 5916 trivial. 0 not checked. [2018-09-10 12:06:15,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:15,763 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:15,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:15,771 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:16,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10584 backedges. 4574 proven. 6 refuted. 0 times theorem prover too weak. 6004 trivial. 0 not checked. [2018-09-10 12:06:17,560 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-09-10 12:06:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10584 backedges. 3147 proven. 214 refuted. 0 times theorem prover too weak. 7223 trivial. 0 not checked. [2018-09-10 12:06:20,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:20,126 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 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:20,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:20,144 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:21,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:21,415 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-10 12:06:21,617 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:21,617 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:06:21,622 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:06:21,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:06:21 BoogieIcfgContainer [2018-09-10 12:06:21,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:06:21,624 INFO L168 Benchmark]: Toolchain (without parser) took 236392.16 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-09-10 12:06:21,625 INFO L168 Benchmark]: CDTParser took 0.22 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 12:06:21,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 820.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-09-10 12:06:21,626 INFO L168 Benchmark]: Boogie Procedure Inliner took 150.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:06:21,626 INFO L168 Benchmark]: Boogie Preprocessor took 272.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -877.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:06:21,627 INFO L168 Benchmark]: RCFGBuilder took 3894.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 140.4 MB). Peak memory consumption was 140.4 MB. Max. memory is 7.1 GB. [2018-09-10 12:06:21,627 INFO L168 Benchmark]: TraceAbstraction took 231247.74 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -347.0 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-10 12:06:21,631 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 820.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 150.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 272.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -877.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3894.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 140.4 MB). Peak memory consumption was 140.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231247.74 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -347.0 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 172). Cancelled while BasicCegarLoop was analyzing trace of length 1847 with TraceHistMax 15, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 231.1s OverallTime, 19 OverallIterations, 15 TraceHistogramMax, 113.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1761 SDtfs, 41441 SDslu, 4379 SDs, 0 SdLazy, 58639 SolverSat, 7870 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 74.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45979 GetRequests, 45258 SyntacticMatches, 82 SemanticMatches, 639 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10618 ImplicationChecksByTransitivity, 43.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21072occurred in iteration=16, 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: 3.9s AutomataMinimizationTime, 18 MinimizatonAttempts, 5476 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 10.7s SatisfiabilityAnalysisTime, 75.3s InterpolantComputationTime, 34985 NumberOfCodeBlocks, 34985 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 57531 ConstructedInterpolants, 12 QuantifiedInterpolants, 256588193 SizeOfPredicates, 107 NumberOfNonLiveVariables, 31783 ConjunctsInSsa, 566 ConjunctsInUnsatCore, 70 InterpolantComputations, 6 PerfectInterpolantSequences, 148969/173875 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label17_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-06-21-652.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label17_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-06-21-652.csv Completed graceful shutdown