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/Problem11_label28_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 11:36:46,485 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 11:36:46,488 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 11:36:46,507 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 11:36:46,508 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 11:36:46,509 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 11:36:46,511 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 11:36:46,513 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 11:36:46,515 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 11:36:46,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 11:36:46,518 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 11:36:46,520 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 11:36:46,521 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 11:36:46,523 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 11:36:46,524 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 11:36:46,533 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 11:36:46,534 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 11:36:46,539 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 11:36:46,541 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 11:36:46,544 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 11:36:46,545 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 11:36:46,546 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 11:36:46,552 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 11:36:46,552 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 11:36:46,552 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 11:36:46,553 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 11:36:46,554 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 11:36:46,556 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 11:36:46,557 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 11:36:46,558 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 11:36:46,558 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 11:36:46,565 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-10 11:36:46,567 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 11:36:46,590 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 11:36:46,590 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 11:36:46,591 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 11:36:46,591 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 11:36:46,591 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 11:36:46,591 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 11:36:46,592 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 11:36:46,592 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 11:36:46,592 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 11:36:46,592 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 11:36:46,592 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 11:36:46,593 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 11:36:46,593 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 11:36:46,594 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 11:36:46,594 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 11:36:46,594 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 11:36:46,594 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 11:36:46,594 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 11:36:46,594 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 11:36:46,595 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 11:36:46,595 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 11:36:46,595 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 11:36:46,595 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 11:36:46,595 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 11:36:46,596 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 11:36:46,596 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 11:36:46,596 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 11:36:46,596 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 11:36:46,596 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 11:36:46,597 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 11:36:46,597 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 11:36:46,597 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 11:36:46,597 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 11:36:46,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 11:36:46,659 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 11:36:46,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 11:36:46,666 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 11:36:46,666 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 11:36:46,667 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28_true-unreach-call.c [2018-09-10 11:36:47,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011d542a5/822dc7ce6f1349ebba2b0b053257ae08/FLAG8b58a2384 [2018-09-10 11:36:47,374 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 11:36:47,375 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28_true-unreach-call.c [2018-09-10 11:36:47,395 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011d542a5/822dc7ce6f1349ebba2b0b053257ae08/FLAG8b58a2384 [2018-09-10 11:36:47,408 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/011d542a5/822dc7ce6f1349ebba2b0b053257ae08 [2018-09-10 11:36:47,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 11:36:47,422 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 11:36:47,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 11:36:47,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 11:36:47,432 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 11:36:47,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:36:47" (1/1) ... [2018-09-10 11:36:47,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181c80c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:47, skipping insertion in model container [2018-09-10 11:36:47,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:36:47" (1/1) ... [2018-09-10 11:36:47,644 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 11:36:48,049 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 11:36:48,070 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 11:36:48,241 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 11:36:48,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48 WrapperNode [2018-09-10 11:36:48,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 11:36:48,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 11:36:48,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 11:36:48,305 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 11:36:48,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 11:36:48,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 11:36:48,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 11:36:48,475 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 11:36:48,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (1/1) ... [2018-09-10 11:36:48,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 11:36:48,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 11:36:48,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 11:36:48,814 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 11:36:48,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (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 11:36:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 11:36:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 11:36:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 11:36:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 11:36:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 11:36:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 11:36:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 11:36:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 11:36:54,290 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 11:36:54,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:36:54 BoogieIcfgContainer [2018-09-10 11:36:54,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 11:36:54,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 11:36:54,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 11:36:54,295 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 11:36:54,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 11:36:47" (1/3) ... [2018-09-10 11:36:54,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fbef54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:36:54, skipping insertion in model container [2018-09-10 11:36:54,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:36:48" (2/3) ... [2018-09-10 11:36:54,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fbef54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:36:54, skipping insertion in model container [2018-09-10 11:36:54,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:36:54" (3/3) ... [2018-09-10 11:36:54,299 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label28_true-unreach-call.c [2018-09-10 11:36:54,309 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 11:36:54,318 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 11:36:54,371 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 11:36:54,372 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 11:36:54,373 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 11:36:54,373 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 11:36:54,373 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 11:36:54,373 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 11:36:54,373 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 11:36:54,374 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 11:36:54,374 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 11:36:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-10 11:36:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-10 11:36:54,414 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:36:54,415 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] [2018-09-10 11:36:54,416 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:36:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash -718311439, now seen corresponding path program 1 times [2018-09-10 11:36:54,425 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:36:54,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:36:54,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:36:54,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:36:54,475 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:36:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:36:54,965 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 11:36:54,967 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:36:54,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 11:36:54,968 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:36:54,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 11:36:54,990 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 11:36:54,991 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:36:54,993 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-09-10 11:36:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:36:58,317 INFO L93 Difference]: Finished difference Result 996 states and 1776 transitions. [2018-09-10 11:36:58,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 11:36:58,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-09-10 11:36:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:36:58,344 INFO L225 Difference]: With dead ends: 996 [2018-09-10 11:36:58,345 INFO L226 Difference]: Without dead ends: 697 [2018-09-10 11:36:58,353 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:36:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2018-09-10 11:36:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 481. [2018-09-10 11:36:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2018-09-10 11:36:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 742 transitions. [2018-09-10 11:36:58,478 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 742 transitions. Word has length 55 [2018-09-10 11:36:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:36:58,483 INFO L480 AbstractCegarLoop]: Abstraction has 481 states and 742 transitions. [2018-09-10 11:36:58,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 11:36:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 742 transitions. [2018-09-10 11:36:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-10 11:36:58,495 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:36:58,496 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:36:58,496 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:36:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash 874631107, now seen corresponding path program 1 times [2018-09-10 11:36:58,500 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:36:58,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:36:58,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:36:58,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:36:58,502 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:36:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:36:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:36:58,881 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:36:58,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 11:36:58,881 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:36:58,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 11:36:58,884 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 11:36:58,884 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 11:36:58,884 INFO L87 Difference]: Start difference. First operand 481 states and 742 transitions. Second operand 6 states. [2018-09-10 11:37:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:02,734 INFO L93 Difference]: Finished difference Result 1725 states and 2777 transitions. [2018-09-10 11:37:02,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 11:37:02,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-09-10 11:37:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:02,748 INFO L225 Difference]: With dead ends: 1725 [2018-09-10 11:37:02,749 INFO L226 Difference]: Without dead ends: 1250 [2018-09-10 11:37:02,754 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 11:37:02,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2018-09-10 11:37:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1231. [2018-09-10 11:37:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2018-09-10 11:37:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1812 transitions. [2018-09-10 11:37:02,837 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1812 transitions. Word has length 128 [2018-09-10 11:37:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:02,837 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 1812 transitions. [2018-09-10 11:37:02,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 11:37:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1812 transitions. [2018-09-10 11:37:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-10 11:37:02,850 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:02,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:37:02,851 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:02,851 INFO L82 PathProgramCache]: Analyzing trace with hash 564016939, now seen corresponding path program 1 times [2018-09-10 11:37:02,851 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:02,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:02,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:02,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:02,853 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:03,272 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:37:03,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 11:37:03,273 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:37:03,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 11:37:03,274 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 11:37:03,274 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-10 11:37:03,274 INFO L87 Difference]: Start difference. First operand 1231 states and 1812 transitions. Second operand 6 states. [2018-09-10 11:37:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:11,380 INFO L93 Difference]: Finished difference Result 4489 states and 7472 transitions. [2018-09-10 11:37:11,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 11:37:11,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2018-09-10 11:37:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:11,420 INFO L225 Difference]: With dead ends: 4489 [2018-09-10 11:37:11,420 INFO L226 Difference]: Without dead ends: 3264 [2018-09-10 11:37:11,445 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-10 11:37:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2018-09-10 11:37:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3182. [2018-09-10 11:37:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3182 states. [2018-09-10 11:37:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 4406 transitions. [2018-09-10 11:37:11,577 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 4406 transitions. Word has length 148 [2018-09-10 11:37:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:11,578 INFO L480 AbstractCegarLoop]: Abstraction has 3182 states and 4406 transitions. [2018-09-10 11:37:11,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 11:37:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 4406 transitions. [2018-09-10 11:37:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-10 11:37:11,588 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:11,588 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 11:37:11,589 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash 733225476, now seen corresponding path program 1 times [2018-09-10 11:37:11,590 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:11,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:11,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:11,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:11,591 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:11,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:11,853 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 11:37:11,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:11,862 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:11,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:12,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:12,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:12,679 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 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:37:12,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:12,707 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:12,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:13,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:13,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:37:13,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-10 11:37:13,301 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:37:13,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 11:37:13,303 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 11:37:13,304 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-10 11:37:13,305 INFO L87 Difference]: Start difference. First operand 3182 states and 4406 transitions. Second operand 6 states. [2018-09-10 11:37:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:17,320 INFO L93 Difference]: Finished difference Result 7034 states and 10705 transitions. [2018-09-10 11:37:17,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 11:37:17,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 200 [2018-09-10 11:37:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:17,350 INFO L225 Difference]: With dead ends: 7034 [2018-09-10 11:37:17,350 INFO L226 Difference]: Without dead ends: 3858 [2018-09-10 11:37:17,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 792 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-10 11:37:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2018-09-10 11:37:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3738. [2018-09-10 11:37:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2018-09-10 11:37:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4946 transitions. [2018-09-10 11:37:17,495 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4946 transitions. Word has length 200 [2018-09-10 11:37:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:17,496 INFO L480 AbstractCegarLoop]: Abstraction has 3738 states and 4946 transitions. [2018-09-10 11:37:17,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 11:37:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4946 transitions. [2018-09-10 11:37:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-10 11:37:17,504 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:17,504 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:37:17,504 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1736454008, now seen corresponding path program 1 times [2018-09-10 11:37:17,505 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:17,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:17,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:17,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:17,507 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:18,172 WARN L175 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 11:37:18,664 WARN L175 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-09-10 11:37:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:37:18,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:18,747 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 11:37:18,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:18,764 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:18,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-10 11:37:18,998 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:19,321 WARN L175 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-10 11:37:19,478 WARN L175 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 11:37:20,124 WARN L175 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-10 11:37:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:37:20,622 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 11:37:20,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-10 11:37:20,623 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:37:20,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 11:37:20,625 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 11:37:20,625 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:37:20,625 INFO L87 Difference]: Start difference. First operand 3738 states and 4946 transitions. Second operand 5 states. [2018-09-10 11:37:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:23,961 INFO L93 Difference]: Finished difference Result 8976 states and 11765 transitions. [2018-09-10 11:37:23,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 11:37:23,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2018-09-10 11:37:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:23,988 INFO L225 Difference]: With dead ends: 8976 [2018-09-10 11:37:23,988 INFO L226 Difference]: Without dead ends: 5244 [2018-09-10 11:37:24,006 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-10 11:37:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2018-09-10 11:37:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 5167. [2018-09-10 11:37:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5167 states. [2018-09-10 11:37:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 6642 transitions. [2018-09-10 11:37:24,144 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 6642 transitions. Word has length 210 [2018-09-10 11:37:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:24,145 INFO L480 AbstractCegarLoop]: Abstraction has 5167 states and 6642 transitions. [2018-09-10 11:37:24,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 11:37:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 6642 transitions. [2018-09-10 11:37:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-10 11:37:24,153 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:24,154 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 11:37:24,154 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1439039131, now seen corresponding path program 1 times [2018-09-10 11:37:24,154 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:24,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:24,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:24,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:24,156 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:24,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:24,741 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:37:24,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:24,754 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:24,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:25,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:25,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:25,423 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 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:37:25,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:25,439 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:25,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:25,710 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:25,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:37:25,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-10 11:37:25,973 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:37:25,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 11:37:25,974 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 11:37:25,974 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2018-09-10 11:37:25,974 INFO L87 Difference]: Start difference. First operand 5167 states and 6642 transitions. Second operand 9 states. [2018-09-10 11:37:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:31,994 INFO L93 Difference]: Finished difference Result 15073 states and 24633 transitions. [2018-09-10 11:37:31,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-10 11:37:31,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 253 [2018-09-10 11:37:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:32,110 INFO L225 Difference]: With dead ends: 15073 [2018-09-10 11:37:32,110 INFO L226 Difference]: Without dead ends: 9912 [2018-09-10 11:37:32,192 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 1011 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2018-09-10 11:37:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9912 states. [2018-09-10 11:37:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9912 to 9482. [2018-09-10 11:37:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9482 states. [2018-09-10 11:37:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9482 states to 9482 states and 12333 transitions. [2018-09-10 11:37:32,616 INFO L78 Accepts]: Start accepts. Automaton has 9482 states and 12333 transitions. Word has length 253 [2018-09-10 11:37:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:32,617 INFO L480 AbstractCegarLoop]: Abstraction has 9482 states and 12333 transitions. [2018-09-10 11:37:32,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 11:37:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 9482 states and 12333 transitions. [2018-09-10 11:37:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-10 11:37:32,633 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:32,634 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 11:37:32,634 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -484433604, now seen corresponding path program 1 times [2018-09-10 11:37:32,635 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:32,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:32,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:32,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:32,636 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-10 11:37:33,003 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:37:33,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 11:37:33,004 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:37:33,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 11:37:33,004 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 11:37:33,004 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 11:37:33,005 INFO L87 Difference]: Start difference. First operand 9482 states and 12333 transitions. Second operand 4 states. [2018-09-10 11:37:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:36,374 INFO L93 Difference]: Finished difference Result 24972 states and 35622 transitions. [2018-09-10 11:37:36,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 11:37:36,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 274 [2018-09-10 11:37:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:36,447 INFO L225 Difference]: With dead ends: 24972 [2018-09-10 11:37:36,447 INFO L226 Difference]: Without dead ends: 15496 [2018-09-10 11:37:36,526 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 11:37:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15496 states. [2018-09-10 11:37:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15496 to 14980. [2018-09-10 11:37:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14980 states. [2018-09-10 11:37:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14980 states to 14980 states and 19279 transitions. [2018-09-10 11:37:36,956 INFO L78 Accepts]: Start accepts. Automaton has 14980 states and 19279 transitions. Word has length 274 [2018-09-10 11:37:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:36,957 INFO L480 AbstractCegarLoop]: Abstraction has 14980 states and 19279 transitions. [2018-09-10 11:37:36,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 11:37:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14980 states and 19279 transitions. [2018-09-10 11:37:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-09-10 11:37:36,987 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:36,987 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:37:36,988 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1247546700, now seen corresponding path program 1 times [2018-09-10 11:37:36,988 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:36,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:36,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:36,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:36,989 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-10 11:37:37,254 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:37:37,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 11:37:37,255 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:37:37,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:37:37,256 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:37:37,256 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 11:37:37,256 INFO L87 Difference]: Start difference. First operand 14980 states and 19279 transitions. Second operand 3 states. [2018-09-10 11:37:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:37:39,441 INFO L93 Difference]: Finished difference Result 29573 states and 38140 transitions. [2018-09-10 11:37:39,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:37:39,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2018-09-10 11:37:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:37:39,502 INFO L225 Difference]: With dead ends: 29573 [2018-09-10 11:37:39,502 INFO L226 Difference]: Without dead ends: 14980 [2018-09-10 11:37:39,563 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 11:37:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14980 states. [2018-09-10 11:37:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14980 to 14980. [2018-09-10 11:37:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14980 states. [2018-09-10 11:37:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14980 states to 14980 states and 18436 transitions. [2018-09-10 11:37:39,920 INFO L78 Accepts]: Start accepts. Automaton has 14980 states and 18436 transitions. Word has length 295 [2018-09-10 11:37:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:37:39,921 INFO L480 AbstractCegarLoop]: Abstraction has 14980 states and 18436 transitions. [2018-09-10 11:37:39,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:37:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14980 states and 18436 transitions. [2018-09-10 11:37:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-10 11:37:39,943 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:37:39,944 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:37:39,944 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:37:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash -834641486, now seen corresponding path program 1 times [2018-09-10 11:37:39,945 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:37:39,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:39,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:39,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:37:39,946 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:37:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:40,779 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 11:37:41,155 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 11:37:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:41,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:41,901 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:37:41,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:41,909 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:42,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:42,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:43,121 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 11:37:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 97 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:43,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:37:43,816 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:37:43,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:37:43,832 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:37:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:37:44,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:37:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:44,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:37:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:37:45,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:37:45,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8, 5, 5] total 33 [2018-09-10 11:37:45,075 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:37:45,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-10 11:37:45,077 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-10 11:37:45,077 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2018-09-10 11:37:45,077 INFO L87 Difference]: Start difference. First operand 14980 states and 18436 transitions. Second operand 23 states. [2018-09-10 11:37:48,327 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-09-10 11:37:48,752 WARN L175 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2018-09-10 11:37:50,273 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2018-09-10 11:37:50,758 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2018-09-10 11:37:52,880 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-09-10 11:37:53,535 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2018-09-10 11:37:54,204 WARN L175 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2018-09-10 11:37:56,964 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-09-10 11:37:57,652 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2018-09-10 11:37:58,035 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2018-09-10 11:37:58,379 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-09-10 11:37:58,533 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2018-09-10 11:38:00,025 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2018-09-10 11:38:01,878 WARN L175 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-09-10 11:38:02,132 WARN L175 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-09-10 11:38:07,362 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2018-09-10 11:38:10,614 WARN L175 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-09-10 11:38:13,742 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-09-10 11:38:16,621 WARN L175 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-09-10 11:38:20,119 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-09-10 11:38:22,015 WARN L175 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-10 11:38:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:23,740 INFO L93 Difference]: Finished difference Result 43112 states and 75155 transitions. [2018-09-10 11:38:23,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-10 11:38:23,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 298 [2018-09-10 11:38:23,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:24,036 INFO L225 Difference]: With dead ends: 43112 [2018-09-10 11:38:24,036 INFO L226 Difference]: Without dead ends: 26307 [2018-09-10 11:38:24,234 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1333 GetRequests, 1176 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8145 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=3450, Invalid=20420, Unknown=0, NotChecked=0, Total=23870 [2018-09-10 11:38:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26307 states. [2018-09-10 11:38:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26307 to 22801. [2018-09-10 11:38:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22801 states. [2018-09-10 11:38:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22801 states to 22801 states and 30322 transitions. [2018-09-10 11:38:25,495 INFO L78 Accepts]: Start accepts. Automaton has 22801 states and 30322 transitions. Word has length 298 [2018-09-10 11:38:25,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:25,496 INFO L480 AbstractCegarLoop]: Abstraction has 22801 states and 30322 transitions. [2018-09-10 11:38:25,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-10 11:38:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 22801 states and 30322 transitions. [2018-09-10 11:38:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-09-10 11:38:25,563 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:25,564 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:38:25,564 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1807844544, now seen corresponding path program 1 times [2018-09-10 11:38:25,564 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:25,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:25,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:25,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:25,566 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 150 proven. 194 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 11:38:26,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:26,319 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-10 11:38:26,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:26,330 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:38:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:26,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-10 11:38:26,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-10 11:38:27,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:27,514 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:38:27,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:27,529 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:27,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-10 11:38:27,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-10 11:38:28,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:38:28,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 6, 5] total 13 [2018-09-10 11:38:28,575 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:38:28,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 11:38:28,576 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 11:38:28,576 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-09-10 11:38:28,578 INFO L87 Difference]: Start difference. First operand 22801 states and 30322 transitions. Second operand 10 states. [2018-09-10 11:38:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:41,125 INFO L93 Difference]: Finished difference Result 58121 states and 81035 transitions. [2018-09-10 11:38:41,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-10 11:38:41,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 370 [2018-09-10 11:38:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:41,295 INFO L225 Difference]: With dead ends: 58121 [2018-09-10 11:38:41,296 INFO L226 Difference]: Without dead ends: 36093 [2018-09-10 11:38:41,406 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1572 GetRequests, 1514 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=518, Invalid=2674, Unknown=0, NotChecked=0, Total=3192 [2018-09-10 11:38:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36093 states. [2018-09-10 11:38:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36093 to 34900. [2018-09-10 11:38:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34900 states. [2018-09-10 11:38:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34900 states to 34900 states and 48224 transitions. [2018-09-10 11:38:42,769 INFO L78 Accepts]: Start accepts. Automaton has 34900 states and 48224 transitions. Word has length 370 [2018-09-10 11:38:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:42,770 INFO L480 AbstractCegarLoop]: Abstraction has 34900 states and 48224 transitions. [2018-09-10 11:38:42,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 11:38:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 34900 states and 48224 transitions. [2018-09-10 11:38:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-09-10 11:38:42,829 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:42,829 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 11:38:42,830 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:42,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1275299725, now seen corresponding path program 1 times [2018-09-10 11:38:42,830 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:42,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:42,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:42,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:42,832 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 364 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-10 11:38:43,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:43,323 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:38:43,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:43,332 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:43,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 465 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:38:44,018 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 359 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:38:44,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:38:44,926 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:38:44,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:44,956 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:38:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:38:45,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:38:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 465 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:38:45,509 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:38:45,688 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-09-10 11:38:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 364 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-10 11:38:46,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:38:46,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 5] total 23 [2018-09-10 11:38:46,475 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:38:46,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 11:38:46,476 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 11:38:46,477 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-10 11:38:46,477 INFO L87 Difference]: Start difference. First operand 34900 states and 48224 transitions. Second operand 13 states. [2018-09-10 11:38:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:38:56,682 INFO L93 Difference]: Finished difference Result 84499 states and 121203 transitions. [2018-09-10 11:38:56,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-10 11:38:56,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 406 [2018-09-10 11:38:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:38:56,980 INFO L225 Difference]: With dead ends: 84499 [2018-09-10 11:38:56,980 INFO L226 Difference]: Without dead ends: 50181 [2018-09-10 11:38:57,196 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1666 GetRequests, 1622 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2018-09-10 11:38:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50181 states. [2018-09-10 11:38:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50181 to 47182. [2018-09-10 11:38:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47182 states. [2018-09-10 11:38:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47182 states to 47182 states and 68197 transitions. [2018-09-10 11:38:59,294 INFO L78 Accepts]: Start accepts. Automaton has 47182 states and 68197 transitions. Word has length 406 [2018-09-10 11:38:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:38:59,295 INFO L480 AbstractCegarLoop]: Abstraction has 47182 states and 68197 transitions. [2018-09-10 11:38:59,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 11:38:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 47182 states and 68197 transitions. [2018-09-10 11:38:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-09-10 11:38:59,374 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:38:59,375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 11:38:59,375 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:38:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash 303171955, now seen corresponding path program 1 times [2018-09-10 11:38:59,375 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:38:59,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:59,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:38:59,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:38:59,377 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:38:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:00,294 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 11:39:00,560 WARN L175 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-10 11:39:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 13 proven. 356 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-10 11:39:01,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:01,269 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:39:01,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:01,276 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:01,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 365 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-10 11:39:01,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:01,922 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 11:39:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 146 proven. 223 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-10 11:39:03,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:03,384 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:39:03,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:03,400 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:03,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-10 11:39:04,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:04,313 WARN L175 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-09-10 11:39:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-10 11:39:04,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:39:04,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8, 6, 5] total 35 [2018-09-10 11:39:04,916 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:39:04,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-10 11:39:04,917 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-10 11:39:04,918 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2018-09-10 11:39:04,918 INFO L87 Difference]: Start difference. First operand 47182 states and 68197 transitions. Second operand 24 states. [2018-09-10 11:39:05,753 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-09-10 11:39:06,173 WARN L175 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2018-09-10 11:39:07,285 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-09-10 11:39:07,808 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-09-10 11:39:08,745 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2018-09-10 11:39:10,844 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2018-09-10 11:39:15,832 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-09-10 11:39:16,199 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-09-10 11:39:17,638 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2018-09-10 11:39:18,776 WARN L175 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2018-09-10 11:39:20,619 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2018-09-10 11:39:20,802 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2018-09-10 11:39:26,040 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2018-09-10 11:39:32,198 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2018-09-10 11:39:33,140 WARN L175 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-09-10 11:39:44,322 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-09-10 11:39:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:39:48,283 INFO L93 Difference]: Finished difference Result 114408 states and 233305 transitions. [2018-09-10 11:39:48,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-10 11:39:48,284 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 415 [2018-09-10 11:39:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:39:49,573 INFO L225 Difference]: With dead ends: 114408 [2018-09-10 11:39:49,574 INFO L226 Difference]: Without dead ends: 65477 [2018-09-10 11:39:50,056 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1809 GetRequests, 1643 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9209 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4198, Invalid=22534, Unknown=0, NotChecked=0, Total=26732 [2018-09-10 11:39:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65477 states. [2018-09-10 11:39:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65477 to 56332. [2018-09-10 11:39:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56332 states. [2018-09-10 11:39:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56332 states to 56332 states and 77843 transitions. [2018-09-10 11:39:54,716 INFO L78 Accepts]: Start accepts. Automaton has 56332 states and 77843 transitions. Word has length 415 [2018-09-10 11:39:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:39:54,717 INFO L480 AbstractCegarLoop]: Abstraction has 56332 states and 77843 transitions. [2018-09-10 11:39:54,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-10 11:39:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 56332 states and 77843 transitions. [2018-09-10 11:39:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-09-10 11:39:54,796 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:39:54,796 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 11:39:54,797 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:39:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -18223156, now seen corresponding path program 1 times [2018-09-10 11:39:54,797 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:39:54,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:54,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:54,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:39:54,799 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:39:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:39:55,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:55,443 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:39:55,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:55,450 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:55,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:39:55,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:39:55,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:39:55,951 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:39:55,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:39:55,968 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:39:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:39:56,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:39:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:39:56,440 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:39:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-10 11:39:56,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:39:56,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 11:39:56,619 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:39:56,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 11:39:56,621 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 11:39:56,621 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 11:39:56,621 INFO L87 Difference]: Start difference. First operand 56332 states and 77843 transitions. Second operand 9 states. [2018-09-10 11:40:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:40:03,605 INFO L93 Difference]: Finished difference Result 120687 states and 195114 transitions. [2018-09-10 11:40:03,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-10 11:40:03,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 432 [2018-09-10 11:40:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:40:04,074 INFO L225 Difference]: With dead ends: 120687 [2018-09-10 11:40:04,075 INFO L226 Difference]: Without dead ends: 64353 [2018-09-10 11:40:04,436 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1754 GetRequests, 1728 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2018-09-10 11:40:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64353 states. [2018-09-10 11:40:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64353 to 63361. [2018-09-10 11:40:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63361 states. [2018-09-10 11:40:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63361 states to 63361 states and 101652 transitions. [2018-09-10 11:40:07,983 INFO L78 Accepts]: Start accepts. Automaton has 63361 states and 101652 transitions. Word has length 432 [2018-09-10 11:40:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:40:07,983 INFO L480 AbstractCegarLoop]: Abstraction has 63361 states and 101652 transitions. [2018-09-10 11:40:07,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 11:40:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 63361 states and 101652 transitions. [2018-09-10 11:40:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-09-10 11:40:08,053 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:40:08,054 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:40:08,054 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 11:40:08,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1171128106, now seen corresponding path program 1 times [2018-09-10 11:40:08,054 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:40:08,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:08,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:08,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:40:08,055 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:40:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 377 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:40:08,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:08,978 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:40:08,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:08,986 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:09,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:11,997 WARN L175 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 106 DAG size of output: 45 [2018-09-10 11:40:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 273 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:40:12,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:12,717 WARN L175 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-10 11:40:13,023 WARN L175 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 11:40:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 377 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:40:14,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:40:14,490 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:40:14,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:40:14,506 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:40:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:40:14,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:40:20,204 WARN L175 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 194 DAG size of output: 47 [2018-09-10 11:40:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 273 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:40:21,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:40:21,521 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-10 11:40:22,738 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-09-10 11:40:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 373 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:40:24,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:40:24,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11, 12, 15] total 52 [2018-09-10 11:40:24,118 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:40:24,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-10 11:40:24,119 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-10 11:40:24,120 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2298, Unknown=0, NotChecked=0, Total=2652 [2018-09-10 11:40:24,120 INFO L87 Difference]: Start difference. First operand 63361 states and 101652 transitions. Second operand 25 states. [2018-09-10 11:40:26,060 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2018-09-10 11:40:27,463 WARN L175 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2018-09-10 11:40:29,402 WARN L175 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-09-10 11:40:31,923 WARN L175 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 73 DAG size of output: 56 Received shutdown request... [2018-09-10 11:40:35,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-10 11:40:35,338 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 11:40:35,343 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 11:40:35,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 11:40:35 BoogieIcfgContainer [2018-09-10 11:40:35,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 11:40:35,345 INFO L168 Benchmark]: Toolchain (without parser) took 227924.58 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -274.4 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-09-10 11:40:35,346 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 11:40:35,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 881.27 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-09-10 11:40:35,347 INFO L168 Benchmark]: Boogie Procedure Inliner took 168.91 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-10 11:40:35,347 INFO L168 Benchmark]: Boogie Preprocessor took 339.27 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 824.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -948.6 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2018-09-10 11:40:35,348 INFO L168 Benchmark]: RCFGBuilder took 5477.18 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 198.7 MB). Peak memory consumption was 198.7 MB. Max. memory is 7.1 GB. [2018-09-10 11:40:35,349 INFO L168 Benchmark]: TraceAbstraction took 221051.79 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 380.4 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-09-10 11:40:35,353 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 881.27 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 168.91 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 339.27 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 824.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -948.6 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5477.18 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 198.7 MB). Peak memory consumption was 198.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221051.79 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 380.4 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 150). Cancelled while BasicCegarLoop was constructing difference of abstraction (63361states) and FLOYD_HOARE automaton (currently 31 states, 25 states before enhancement), while ReachableStatesComputation was computing reachable states (904 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 220.9s OverallTime, 14 OverallIterations, 4 TraceHistogramMax, 161.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2757 SDtfs, 35544 SDslu, 5819 SDs, 0 SdLazy, 65790 SolverSat, 14438 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 99.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12241 GetRequests, 11628 SyntacticMatches, 39 SemanticMatches, 574 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20782 ImplicationChecksByTransitivity, 50.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63361occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 14.7s AutomataMinimizationTime, 13 MinimizatonAttempts, 19295 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 37.0s InterpolantComputationTime, 9753 NumberOfCodeBlocks, 9753 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 15537 ConstructedInterpolants, 14 QuantifiedInterpolants, 44700173 SizeOfPredicates, 48 NumberOfNonLiveVariables, 9773 ConjunctsInSsa, 247 ConjunctsInUnsatCore, 48 InterpolantComputations, 6 PerfectInterpolantSequences, 13305/15588 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/Problem11_label28_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_11-40-35-365.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label28_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_11-40-35-365.csv Completed graceful shutdown