java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/linear_search_false-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 10:43:50,575 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 10:43:50,577 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 10:43:50,600 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 10:43:50,600 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 10:43:50,603 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 10:43:50,605 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 10:43:50,607 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 10:43:50,608 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 10:43:50,609 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 10:43:50,610 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 10:43:50,611 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 10:43:50,612 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 10:43:50,613 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 10:43:50,614 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 10:43:50,615 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 10:43:50,616 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 10:43:50,618 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 10:43:50,620 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 10:43:50,622 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 10:43:50,623 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 10:43:50,624 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 10:43:50,627 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 10:43:50,628 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 10:43:50,628 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 10:43:50,629 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 10:43:50,630 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 10:43:50,631 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 10:43:50,632 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 10:43:50,633 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 10:43:50,633 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 10:43:50,634 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 10:43:50,635 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 10:43:50,635 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 10:43:50,636 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 10:43:50,637 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 10:43:50,637 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 10:43:50,654 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 10:43:50,654 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 10:43:50,655 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 10:43:50,655 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 10:43:50,656 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 10:43:50,656 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 10:43:50,656 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 10:43:50,656 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 10:43:50,656 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 10:43:50,657 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 10:43:50,657 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 10:43:50,658 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 10:43:50,658 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 10:43:50,658 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 10:43:50,658 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 10:43:50,658 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 10:43:50,659 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 10:43:50,659 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 10:43:50,659 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 10:43:50,659 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 10:43:50,659 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 10:43:50,660 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 10:43:50,660 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 10:43:50,660 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 10:43:50,660 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 10:43:50,660 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 10:43:50,661 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 10:43:50,661 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 10:43:50,661 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 10:43:50,661 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 10:43:50,661 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 10:43:50,662 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 10:43:50,662 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 10:43:50,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 10:43:50,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 10:43:50,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 10:43:50,729 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 10:43:50,729 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 10:43:50,730 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search_false-unreach-call.i [2018-07-24 10:43:51,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742689799/d18fe6cd87eb4b13866ed05b5297c049/FLAG85e30f703 [2018-07-24 10:43:51,215 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 10:43:51,216 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search_false-unreach-call.i [2018-07-24 10:43:51,224 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742689799/d18fe6cd87eb4b13866ed05b5297c049/FLAG85e30f703 [2018-07-24 10:43:51,239 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742689799/d18fe6cd87eb4b13866ed05b5297c049 [2018-07-24 10:43:51,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 10:43:51,253 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 10:43:51,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:51,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 10:43:51,262 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 10:43:51,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6cfecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51, skipping insertion in model container [2018-07-24 10:43:51,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,491 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 10:43:51,538 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:51,562 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 10:43:51,570 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:51,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51 WrapperNode [2018-07-24 10:43:51,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:51,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:51,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 10:43:51,588 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 10:43:51,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:51,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 10:43:51,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 10:43:51,639 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 10:43:51,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... [2018-07-24 10:43:51,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 10:43:51,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 10:43:51,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 10:43:51,666 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 10:43:51,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 10:43:51,805 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i__linear_search [2018-07-24 10:43:51,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i__linear_search [2018-07-24 10:43:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 10:43:51,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 10:43:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 10:43:51,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 10:43:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 10:43:51,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 10:43:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assert [2018-07-24 10:43:51,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assert [2018-07-24 10:43:52,253 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 10:43:52,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:52 BoogieIcfgContainer [2018-07-24 10:43:52,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 10:43:52,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 10:43:52,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 10:43:52,258 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 10:43:52,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 10:43:51" (1/3) ... [2018-07-24 10:43:52,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1500c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:52, skipping insertion in model container [2018-07-24 10:43:52,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:51" (2/3) ... [2018-07-24 10:43:52,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1500c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:52, skipping insertion in model container [2018-07-24 10:43:52,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:52" (3/3) ... [2018-07-24 10:43:52,261 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search_false-unreach-call.i [2018-07-24 10:43:52,269 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 10:43:52,276 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 10:43:52,319 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 10:43:52,320 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 10:43:52,320 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 10:43:52,320 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 10:43:52,320 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 10:43:52,321 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 10:43:52,321 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 10:43:52,321 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 10:43:52,321 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 10:43:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-07-24 10:43:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-24 10:43:52,348 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:52,350 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:52,350 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 700043364, now seen corresponding path program 1 times [2018-07-24 10:43:52,359 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:52,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:52,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:52,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:52,411 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:52,550 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:52,551 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-24 10:43:52,551 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:52,557 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-24 10:43:52,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-24 10:43:52,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:43:52,573 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-07-24 10:43:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:52,600 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2018-07-24 10:43:52,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 10:43:52,602 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-07-24 10:43:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:52,610 INFO L225 Difference]: With dead ends: 45 [2018-07-24 10:43:52,610 INFO L226 Difference]: Without dead ends: 22 [2018-07-24 10:43:52,614 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:43:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-24 10:43:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-24 10:43:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-24 10:43:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-07-24 10:43:52,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2018-07-24 10:43:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:52,655 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-07-24 10:43:52,655 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-24 10:43:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-07-24 10:43:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-24 10:43:52,657 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:52,657 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:52,657 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1077985819, now seen corresponding path program 1 times [2018-07-24 10:43:52,659 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:52,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:52,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:52,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:52,661 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:53,087 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:53,087 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 10:43:53,087 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:53,089 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 10:43:53,090 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 10:43:53,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-24 10:43:53,090 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2018-07-24 10:43:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:53,209 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-07-24 10:43:53,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 10:43:53,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-07-24 10:43:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:53,211 INFO L225 Difference]: With dead ends: 30 [2018-07-24 10:43:53,211 INFO L226 Difference]: Without dead ends: 22 [2018-07-24 10:43:53,212 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 10:43:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-24 10:43:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-24 10:43:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-24 10:43:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-07-24 10:43:53,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2018-07-24 10:43:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:53,218 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-07-24 10:43:53,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 10:43:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-07-24 10:43:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-24 10:43:53,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:53,219 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:53,220 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:53,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1474171142, now seen corresponding path program 1 times [2018-07-24 10:43:53,220 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:53,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:53,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:53,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:53,222 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:53,569 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-07-24 10:43:53,741 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-07-24 10:43:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:53,808 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:53,808 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 10:43:53,809 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:53,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 10:43:53,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 10:43:53,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-07-24 10:43:53,810 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2018-07-24 10:43:54,150 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2018-07-24 10:43:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:54,202 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-07-24 10:43:54,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 10:43:54,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-07-24 10:43:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:54,206 INFO L225 Difference]: With dead ends: 39 [2018-07-24 10:43:54,206 INFO L226 Difference]: Without dead ends: 30 [2018-07-24 10:43:54,207 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-07-24 10:43:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-24 10:43:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-07-24 10:43:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-24 10:43:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-07-24 10:43:54,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-07-24 10:43:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:54,215 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-07-24 10:43:54,215 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 10:43:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-07-24 10:43:54,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-24 10:43:54,216 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:54,216 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:54,217 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1867198152, now seen corresponding path program 1 times [2018-07-24 10:43:54,217 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:54,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:54,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:54,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:54,219 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:54,550 WARN L169 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-07-24 10:43:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:54,674 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:54,674 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 10:43:54,674 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:54,675 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 10:43:54,675 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 10:43:54,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:43:54,676 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2018-07-24 10:43:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:54,820 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2018-07-24 10:43:54,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:43:54,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-07-24 10:43:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:54,822 INFO L225 Difference]: With dead ends: 36 [2018-07-24 10:43:54,822 INFO L226 Difference]: Without dead ends: 27 [2018-07-24 10:43:54,823 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 10:43:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-24 10:43:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-07-24 10:43:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-24 10:43:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-07-24 10:43:54,829 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-07-24 10:43:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:54,830 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-07-24 10:43:54,830 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 10:43:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-07-24 10:43:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-24 10:43:54,831 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:54,831 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:54,831 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash -461535108, now seen corresponding path program 1 times [2018-07-24 10:43:54,832 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:54,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:54,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:54,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:54,834 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:54,926 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:54,926 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 10:43:54,926 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:54,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:43:54,927 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:43:54,927 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-24 10:43:54,928 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2018-07-24 10:43:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:54,980 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2018-07-24 10:43:54,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 10:43:54,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-07-24 10:43:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:54,983 INFO L225 Difference]: With dead ends: 48 [2018-07-24 10:43:54,983 INFO L226 Difference]: Without dead ends: 34 [2018-07-24 10:43:54,984 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-24 10:43:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-24 10:43:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2018-07-24 10:43:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-24 10:43:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2018-07-24 10:43:54,992 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2018-07-24 10:43:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:54,992 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2018-07-24 10:43:54,992 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:43:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2018-07-24 10:43:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-24 10:43:54,994 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:54,994 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:54,994 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1048341122, now seen corresponding path program 1 times [2018-07-24 10:43:54,994 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:54,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:54,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:54,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:54,996 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:55,720 WARN L169 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-07-24 10:43:56,241 WARN L169 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2018-07-24 10:43:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:56,288 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:43:56,289 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:43:56,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:56,310 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:43:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:56,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:43:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:56,592 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:43:56,711 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-07-24 10:43:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:57,343 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:43:57,343 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 10:43:57,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:57,361 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:43:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:57,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:43:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 10:43:57,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:43:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 10:43:58,109 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:43:58,109 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7, 6, 6] total 21 [2018-07-24 10:43:58,110 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:43:58,110 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 10:43:58,111 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 10:43:58,111 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-07-24 10:43:58,111 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2018-07-24 10:43:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:58,568 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-07-24 10:43:58,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 10:43:58,570 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-07-24 10:43:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:58,571 INFO L225 Difference]: With dead ends: 45 [2018-07-24 10:43:58,572 INFO L226 Difference]: Without dead ends: 36 [2018-07-24 10:43:58,573 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-07-24 10:43:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-24 10:43:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2018-07-24 10:43:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-24 10:43:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-07-24 10:43:58,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2018-07-24 10:43:58,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:58,580 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-07-24 10:43:58,580 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 10:43:58,580 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-07-24 10:43:58,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-24 10:43:58,581 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:58,581 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:58,581 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1441368132, now seen corresponding path program 1 times [2018-07-24 10:43:58,582 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:58,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:58,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:58,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:58,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:01,314 WARN L169 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 110 DAG size of output: 29 [2018-07-24 10:44:01,588 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 29 [2018-07-24 10:44:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,592 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,592 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 10:44:01,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:01,602 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:01,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:01,667 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:44:01,667 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:09,749 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-07-24 10:44:09,751 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:44:09,752 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:09,755 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:09,760 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:09,761 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-07-24 10:44:10,566 WARN L169 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-07-24 10:44:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:11,066 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:11,233 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2018-07-24 10:44:12,387 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2018-07-24 10:44:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:12,445 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:12,446 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:44:12,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:12,463 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:12,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:12,611 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-07-24 10:44:12,623 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:44:12,624 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:12,730 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:12,767 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-07-24 10:44:12,781 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:44:12,782 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:12,847 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:20,902 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:20,903 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-07-24 10:44:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:21,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:21,246 WARN L169 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-07-24 10:44:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:21,853 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:21,853 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11, 10, 10] total 28 [2018-07-24 10:44:21,853 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:21,853 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 10:44:21,854 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 10:44:21,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2018-07-24 10:44:21,854 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 16 states. [2018-07-24 10:44:22,468 WARN L169 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2018-07-24 10:44:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:23,025 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2018-07-24 10:44:23,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 10:44:23,027 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2018-07-24 10:44:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:23,029 INFO L225 Difference]: With dead ends: 51 [2018-07-24 10:44:23,029 INFO L226 Difference]: Without dead ends: 39 [2018-07-24 10:44:23,030 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 10:44:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-24 10:44:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2018-07-24 10:44:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-24 10:44:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-07-24 10:44:23,037 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2018-07-24 10:44:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:23,038 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-07-24 10:44:23,038 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 10:44:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-07-24 10:44:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-24 10:44:23,039 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:23,039 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:23,039 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1519168392, now seen corresponding path program 1 times [2018-07-24 10:44:23,039 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:23,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:23,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:23,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:23,041 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:23,354 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 2 [2018-07-24 10:44:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 10:44:23,364 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:44:23,365 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 10:44:23,365 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:44:23,365 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:44:23,365 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:44:23,366 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-24 10:44:23,366 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2018-07-24 10:44:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:23,433 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-07-24 10:44:23,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:44:23,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-07-24 10:44:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:23,434 INFO L225 Difference]: With dead ends: 60 [2018-07-24 10:44:23,435 INFO L226 Difference]: Without dead ends: 39 [2018-07-24 10:44:23,435 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:44:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-24 10:44:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-07-24 10:44:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-24 10:44:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-07-24 10:44:23,442 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-07-24 10:44:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:23,442 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-07-24 10:44:23,443 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:44:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-07-24 10:44:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-24 10:44:23,444 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:23,444 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:23,444 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1912195402, now seen corresponding path program 1 times [2018-07-24 10:44:23,444 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:23,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:23,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:23,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:23,446 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:23,585 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:23,586 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:23,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:23,594 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:23,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:23,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:23,843 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:23,843 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:44:23,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:23,859 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:23,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:23,930 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:23,965 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:23,966 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 10 [2018-07-24 10:44:23,966 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:23,966 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 10:44:23,967 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 10:44:23,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:23,967 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 7 states. [2018-07-24 10:44:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:24,486 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-07-24 10:44:24,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:44:24,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-07-24 10:44:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:24,487 INFO L225 Difference]: With dead ends: 57 [2018-07-24 10:44:24,487 INFO L226 Difference]: Without dead ends: 44 [2018-07-24 10:44:24,488 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-24 10:44:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2018-07-24 10:44:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-24 10:44:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-07-24 10:44:24,495 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2018-07-24 10:44:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:24,496 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-07-24 10:44:24,496 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 10:44:24,496 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-07-24 10:44:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-24 10:44:24,497 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:24,497 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:24,497 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2105974406, now seen corresponding path program 2 times [2018-07-24 10:44:24,498 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:24,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:24,499 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:24,968 WARN L169 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 8 [2018-07-24 10:44:25,252 WARN L169 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 8 [2018-07-24 10:44:25,541 WARN L169 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2018-07-24 10:44:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:25,681 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:25,681 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-24 10:44:25,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:25,698 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:25,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-07-24 10:44:25,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:25,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 10:44:25,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 10:44:26,225 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:26,225 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:44:26,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:26,243 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:26,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-07-24 10:44:26,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:26,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:34,493 WARN L169 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-07-24 10:44:37,467 WARN L169 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 10:44:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 10:44:37,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 10:44:38,595 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:38,596 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6, 7, 6] total 25 [2018-07-24 10:44:38,596 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:38,596 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 10:44:38,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 10:44:38,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=481, Unknown=5, NotChecked=0, Total=600 [2018-07-24 10:44:38,597 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2018-07-24 10:44:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:41,615 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2018-07-24 10:44:41,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 10:44:41,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2018-07-24 10:44:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:41,616 INFO L225 Difference]: With dead ends: 56 [2018-07-24 10:44:41,616 INFO L226 Difference]: Without dead ends: 44 [2018-07-24 10:44:41,618 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=246, Invalid=938, Unknown=6, NotChecked=0, Total=1190 [2018-07-24 10:44:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-24 10:44:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2018-07-24 10:44:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-24 10:44:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-07-24 10:44:41,624 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2018-07-24 10:44:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:41,625 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-07-24 10:44:41,625 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 10:44:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-07-24 10:44:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-24 10:44:41,626 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:41,626 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:41,626 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1795965880, now seen corresponding path program 2 times [2018-07-24 10:44:41,627 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:41,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:41,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:41,631 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:42,286 WARN L169 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2018-07-24 10:44:42,565 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2018-07-24 10:44:43,038 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2018-07-24 10:44:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:43,046 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:43,046 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:43,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:43,058 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:43,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:43,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:43,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:43,171 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-07-24 10:44:43,174 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:44:43,174 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,215 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,221 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-07-24 10:44:43,227 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:44:43,228 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,246 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,251 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:44:43,252 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,257 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-07-24 10:44:43,263 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:44:43,263 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,284 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,286 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:44:43,286 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,291 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-07-24 10:44:43,295 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:44:43,295 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-07-24 10:44:43,310 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:44:53,446 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-07-24 10:44:53,447 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-07-24 10:44:57,651 WARN L169 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2018-07-24 10:44:58,651 WARN L169 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2018-07-24 10:44:59,018 WARN L169 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2018-07-24 10:45:01,916 WARN L169 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 62 [2018-07-24 10:45:02,288 WARN L169 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2018-07-24 10:45:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:45:02,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:45:02,671 WARN L169 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2018-07-24 10:45:02,859 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2018-07-24 10:45:03,503 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2018-07-24 10:45:03,893 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-07-24 10:45:04,197 WARN L169 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2018-07-24 10:45:04,431 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2018-07-24 10:45:04,695 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2018-07-24 10:45:05,161 WARN L169 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2018-07-24 10:45:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:45:05,288 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:45:05,289 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:45:05,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:45:05,314 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:45:05,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:45:05,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:45:05,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:45:05,461 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-07-24 10:45:05,480 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:45:05,481 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:45:05,588 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:45:05,593 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-07-24 10:45:05,597 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:45:05,597 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:45:07,646 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:45:07,650 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:45:07,650 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-07-24 10:45:07,654 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-07-24 10:45:07,659 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:45:07,660 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-07-24 10:45:07,679 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:45:07,684 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-07-24 10:45:07,692 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:45:07,693 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-07-24 10:45:07,703 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:45:07,705 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:45:07,705 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-07-24 10:45:09,805 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-07-24 10:45:09,806 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-07-24 10:45:20,689 WARN L169 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-07-24 10:45:35,756 WARN L169 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 51 [2018-07-24 10:45:47,586 WARN L169 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2018-07-24 10:46:01,316 WARN L169 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2018-07-24 10:46:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:05,653 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:46:05,893 WARN L169 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2018-07-24 10:46:06,290 WARN L169 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2018-07-24 10:46:07,430 WARN L169 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2018-07-24 10:46:08,023 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2018-07-24 10:46:08,457 WARN L169 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-07-24 10:46:08,794 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-07-24 10:46:09,214 WARN L169 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-07-24 10:46:09,684 WARN L169 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-07-24 10:46:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (11)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 10:46:09,715 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:46:09,716 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13, 14, 13] total 57 [2018-07-24 10:46:09,716 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:46:09,716 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-24 10:46:09,716 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-24 10:46:09,719 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2747, Unknown=21, NotChecked=0, Total=3192 [2018-07-24 10:46:09,719 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 23 states. [2018-07-24 10:46:12,252 WARN L169 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2018-07-24 10:46:14,002 WARN L169 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2018-07-24 10:46:16,273 WARN L169 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-07-24 10:46:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:46:16,714 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-07-24 10:46:16,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 10:46:16,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2018-07-24 10:46:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:46:16,721 INFO L225 Difference]: With dead ends: 50 [2018-07-24 10:46:16,721 INFO L226 Difference]: Without dead ends: 40 [2018-07-24 10:46:16,723 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 76.0s TimeCoverageRelationStatistics Valid=531, Invalid=3230, Unknown=21, NotChecked=0, Total=3782 [2018-07-24 10:46:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-24 10:46:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-07-24 10:46:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-24 10:46:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-07-24 10:46:16,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 30 [2018-07-24 10:46:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:46:16,730 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-07-24 10:46:16,730 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-24 10:46:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-07-24 10:46:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-24 10:46:16,731 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:46:16,731 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:46:16,731 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:46:16,731 INFO L82 PathProgramCache]: Analyzing trace with hash 872187962, now seen corresponding path program 2 times [2018-07-24 10:46:16,731 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:46:16,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:16,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:46:16,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:16,733 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:46:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:46:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:17,730 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:46:17,730 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:46:17,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:46:17,737 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:46:17,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:46:17,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:46:17,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:46:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:17,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:46:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:17,930 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:46:17,930 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:46:17,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:46:17,946 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:46:18,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:46:18,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:46:18,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:46:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:18,046 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:46:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:18,188 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:46:18,188 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 13 [2018-07-24 10:46:18,188 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:46:18,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 10:46:18,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 10:46:18,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-07-24 10:46:18,189 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 9 states. [2018-07-24 10:46:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:46:18,908 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-07-24 10:46:18,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 10:46:18,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-07-24 10:46:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:46:18,909 INFO L225 Difference]: With dead ends: 62 [2018-07-24 10:46:18,909 INFO L226 Difference]: Without dead ends: 49 [2018-07-24 10:46:18,910 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-07-24 10:46:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-24 10:46:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2018-07-24 10:46:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-24 10:46:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-07-24 10:46:18,930 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2018-07-24 10:46:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:46:18,930 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-07-24 10:46:18,931 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 10:46:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-07-24 10:46:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-24 10:46:18,931 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:46:18,932 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:46:18,932 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:46:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash 285381948, now seen corresponding path program 3 times [2018-07-24 10:46:18,934 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:46:18,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:18,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:46:18,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:18,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:46:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:46:19,611 WARN L169 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 42 [2018-07-24 10:46:20,156 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2018-07-24 10:46:20,837 WARN L169 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2018-07-24 10:46:21,175 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2018-07-24 10:46:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:21,184 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:46:21,184 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:46:21,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:46:21,191 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:46:21,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-24 10:46:21,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:46:21,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:46:21,958 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-07-24 10:46:21,960 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:46:21,961 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:46:21,972 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:21,978 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-07-24 10:46:21,981 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:46:21,981 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:46:21,989 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:26,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:26,029 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-07-24 10:46:26,664 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-07-24 10:46:27,561 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-07-24 10:46:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:27,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:46:28,052 WARN L169 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2018-07-24 10:46:28,236 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2018-07-24 10:46:28,995 WARN L169 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2018-07-24 10:46:29,498 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2018-07-24 10:46:29,800 WARN L169 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-07-24 10:46:30,102 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2018-07-24 10:46:30,486 WARN L169 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2018-07-24 10:46:31,045 WARN L169 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-07-24 10:46:31,594 WARN L169 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2018-07-24 10:46:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:31,640 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:46:31,640 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:46:31,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:46:31,656 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:46:31,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-24 10:46:31,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:46:31,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:46:31,883 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:46:31,884 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-07-24 10:46:35,923 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-07-24 10:46:35,925 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:46:35,926 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-07-24 10:46:35,927 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:35,932 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:35,933 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-07-24 10:46:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:36,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:46:37,042 WARN L169 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2018-07-24 10:46:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:38,407 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:46:38,407 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 11, 10] total 54 [2018-07-24 10:46:38,407 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:46:38,407 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-24 10:46:38,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-24 10:46:38,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2622, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 10:46:38,409 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 27 states. [2018-07-24 10:46:39,707 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 53 [2018-07-24 10:46:40,329 WARN L169 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2018-07-24 10:46:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:46:40,995 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-07-24 10:46:40,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 10:46:40,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2018-07-24 10:46:40,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:46:40,996 INFO L225 Difference]: With dead ends: 55 [2018-07-24 10:46:40,997 INFO L226 Difference]: Without dead ends: 45 [2018-07-24 10:46:40,998 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=340, Invalid=3200, Unknown=0, NotChecked=0, Total=3540 [2018-07-24 10:46:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-24 10:46:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-07-24 10:46:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-24 10:46:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-07-24 10:46:41,006 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2018-07-24 10:46:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:46:41,006 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-07-24 10:46:41,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-24 10:46:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-07-24 10:46:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-24 10:46:41,007 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:46:41,007 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:46:41,007 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:46:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash -242185930, now seen corresponding path program 3 times [2018-07-24 10:46:41,008 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:46:41,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:41,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:46:41,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:41,009 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:46:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:46:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:44,935 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:46:44,935 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:46:44,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:46:44,946 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:46:45,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-07-24 10:46:45,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:46:45,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:46:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:45,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:46:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:45,799 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:46:45,799 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:46:45,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:46:45,816 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:46:46,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-07-24 10:46:46,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:46:46,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:46:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:46,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:46:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:46,239 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:46:46,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 16 [2018-07-24 10:46:46,240 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:46:46,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 10:46:46,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 10:46:46,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=161, Unknown=1, NotChecked=0, Total=240 [2018-07-24 10:46:46,241 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 11 states. [2018-07-24 10:46:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:46:46,449 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-07-24 10:46:46,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 10:46:46,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-07-24 10:46:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:46:46,450 INFO L225 Difference]: With dead ends: 67 [2018-07-24 10:46:46,450 INFO L226 Difference]: Without dead ends: 54 [2018-07-24 10:46:46,451 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=78, Invalid=161, Unknown=1, NotChecked=0, Total=240 [2018-07-24 10:46:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-24 10:46:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2018-07-24 10:46:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-24 10:46:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-07-24 10:46:46,458 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2018-07-24 10:46:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:46:46,459 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-07-24 10:46:46,459 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 10:46:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-07-24 10:46:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-24 10:46:46,459 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:46:46,460 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:46:46,460 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:46:46,460 INFO L82 PathProgramCache]: Analyzing trace with hash -828991944, now seen corresponding path program 4 times [2018-07-24 10:46:46,460 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:46:46,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:46,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:46:46,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:46:46,461 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:46:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:46:47,378 WARN L169 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 38 [2018-07-24 10:46:48,076 WARN L169 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2018-07-24 10:46:48,793 WARN L169 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2018-07-24 10:46:49,238 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-07-24 10:46:49,615 WARN L169 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 49 [2018-07-24 10:46:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:49,626 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:46:49,626 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:46:49,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:46:49,634 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:46:49,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:46:49,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:46:49,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:46:49,732 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-07-24 10:46:49,734 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:46:49,734 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:46:49,745 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:49,749 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-07-24 10:46:49,753 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:46:49,754 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:46:49,760 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:57,814 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:46:57,814 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-07-24 10:46:58,769 WARN L169 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-07-24 10:46:59,479 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2018-07-24 10:46:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:46:59,739 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:47:00,136 WARN L169 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 93 [2018-07-24 10:47:00,306 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2018-07-24 10:47:01,162 WARN L169 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-07-24 10:47:01,365 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-07-24 10:47:01,595 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-07-24 10:47:01,839 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2018-07-24 10:47:02,337 WARN L169 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2018-07-24 10:47:02,881 WARN L169 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2018-07-24 10:47:03,258 WARN L169 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-07-24 10:47:03,876 WARN L169 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-07-24 10:47:04,640 WARN L169 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2018-07-24 10:47:05,511 WARN L169 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-07-24 10:47:06,322 WARN L169 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2018-07-24 10:47:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:06,376 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:47:06,377 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:47:06,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:47:06,393 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:47:06,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:47:06,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:47:06,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:47:06,576 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-07-24 10:47:06,580 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:47:06,580 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:47:06,589 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:47:06,592 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-07-24 10:47:06,597 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:47:06,597 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:47:06,607 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:47:14,661 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:47:14,662 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-07-24 10:47:17,414 WARN L169 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-07-24 10:47:19,498 WARN L169 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-07-24 10:47:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:19,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:47:20,419 WARN L169 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2018-07-24 10:47:20,639 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2018-07-24 10:47:22,582 WARN L169 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-07-24 10:47:22,922 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-07-24 10:47:24,834 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-07-24 10:47:25,372 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2018-07-24 10:47:25,907 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-07-24 10:47:26,647 WARN L169 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-07-24 10:47:27,778 WARN L169 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2018-07-24 10:47:28,584 WARN L169 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-07-24 10:47:29,858 WARN L169 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2018-07-24 10:47:31,672 WARN L169 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-07-24 10:47:34,067 WARN L169 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2018-07-24 10:47:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:34,109 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:47:34,109 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17, 18, 17] total 71 [2018-07-24 10:47:34,109 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:47:34,110 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-24 10:47:34,110 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-24 10:47:34,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=4483, Unknown=0, NotChecked=0, Total=4970 [2018-07-24 10:47:34,112 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 30 states. [2018-07-24 10:47:35,556 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2018-07-24 10:47:35,891 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2018-07-24 10:47:36,435 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2018-07-24 10:47:36,993 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2018-07-24 10:47:37,579 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 50 [2018-07-24 10:47:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:47:37,855 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-07-24 10:47:37,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-24 10:47:37,856 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 40 [2018-07-24 10:47:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:47:37,856 INFO L225 Difference]: With dead ends: 60 [2018-07-24 10:47:37,856 INFO L226 Difference]: Without dead ends: 50 [2018-07-24 10:47:37,859 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 100 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=664, Invalid=5656, Unknown=0, NotChecked=0, Total=6320 [2018-07-24 10:47:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-24 10:47:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-07-24 10:47:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-24 10:47:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-07-24 10:47:37,867 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 40 [2018-07-24 10:47:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:47:37,867 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-07-24 10:47:37,867 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-24 10:47:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-07-24 10:47:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-24 10:47:37,868 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:47:37,868 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:47:37,868 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:47:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1048692154, now seen corresponding path program 4 times [2018-07-24 10:47:37,869 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:47:37,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:47:37,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:47:37,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:47:37,870 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:47:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:47:38,548 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 9 [2018-07-24 10:47:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:41,073 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:47:41,073 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:47:41,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:47:41,082 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:47:41,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:47:41,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:47:41,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:47:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:41,234 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:47:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:41,449 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:47:41,450 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:47:41,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:47:41,465 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:47:41,557 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:47:41,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:47:41,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:47:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:41,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:47:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:41,595 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:47:41,595 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-07-24 10:47:41,595 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:47:41,596 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 10:47:41,596 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 10:47:41,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=235, Unknown=1, NotChecked=0, Total=342 [2018-07-24 10:47:41,597 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 13 states. [2018-07-24 10:47:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:47:41,799 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-07-24 10:47:41,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 10:47:41,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2018-07-24 10:47:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:47:41,800 INFO L225 Difference]: With dead ends: 72 [2018-07-24 10:47:41,800 INFO L226 Difference]: Without dead ends: 59 [2018-07-24 10:47:41,800 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=106, Invalid=235, Unknown=1, NotChecked=0, Total=342 [2018-07-24 10:47:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-24 10:47:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2018-07-24 10:47:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-24 10:47:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-07-24 10:47:41,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2018-07-24 10:47:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:47:41,809 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-07-24 10:47:41,809 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 10:47:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-07-24 10:47:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-24 10:47:41,810 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:47:41,810 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:47:41,810 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_linear_search_false_unreach_call_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:47:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash 461886140, now seen corresponding path program 5 times [2018-07-24 10:47:41,811 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:47:41,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:47:41,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:47:41,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:47:41,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:47:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:47:42,823 WARN L169 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 39 [2018-07-24 10:47:43,462 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2018-07-24 10:47:43,615 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2018-07-24 10:47:44,069 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2018-07-24 10:47:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:44,083 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:47:44,083 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:47:44,090 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:47:44,091 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:47:44,256 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-24 10:47:44,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:47:44,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:47:44,266 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-07-24 10:47:44,271 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:47:44,271 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:47:44,280 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:47:44,287 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-07-24 10:47:44,288 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:47:44,289 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:47:44,299 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:47:52,349 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:47:52,349 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-07-24 10:47:53,828 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2018-07-24 10:47:54,313 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2018-07-24 10:47:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:47:54,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:47:54,934 WARN L169 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 97 [2018-07-24 10:47:55,093 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2018-07-24 10:47:55,936 WARN L169 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-07-24 10:47:56,148 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-07-24 10:47:56,390 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-07-24 10:47:56,624 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2018-07-24 10:47:57,110 WARN L169 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2018-07-24 10:47:57,465 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-07-24 10:47:57,803 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-07-24 10:47:58,258 WARN L169 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-07-24 10:47:58,893 WARN L169 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2018-07-24 10:47:59,451 WARN L169 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2018-07-24 10:48:00,071 WARN L169 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2018-07-24 10:48:00,614 WARN L169 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-07-24 10:48:01,350 WARN L169 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-07-24 10:48:02,945 WARN L169 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2018-07-24 10:48:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:03,007 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:03,007 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:48:03,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:48:03,023 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:48:03,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-24 10:48:03,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:03,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:03,294 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-07-24 10:48:03,300 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:48:03,300 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,325 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,327 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:48:05,327 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,328 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-07-24 10:48:05,328 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,333 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-07-24 10:48:05,341 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:48:05,341 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,352 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,356 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-07-24 10:48:05,359 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:48:05,359 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,377 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,382 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-07-24 10:48:05,386 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-07-24 10:48:05,386 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-07-24 10:48:05,405 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. Received shutdown request... [2018-07-24 10:48:17,530 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 10:48:17,730 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:48:17,731 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 10:48:17,736 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 10:48:17,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 10:48:17 BoogieIcfgContainer [2018-07-24 10:48:17,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 10:48:17,737 INFO L168 Benchmark]: Toolchain (without parser) took 266485.36 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 886.6 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -258.6 MB). Peak memory consumption was 628.0 MB. Max. memory is 7.1 GB. [2018-07-24 10:48:17,738 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:48:17,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 10:48:17,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:48:17,739 INFO L168 Benchmark]: Boogie Preprocessor took 27.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:48:17,739 INFO L168 Benchmark]: RCFGBuilder took 588.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -785.2 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-07-24 10:48:17,740 INFO L168 Benchmark]: TraceAbstraction took 265481.54 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 136.3 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 516.1 MB). Peak memory consumption was 652.4 MB. Max. memory is 7.1 GB. [2018-07-24 10:48:17,742 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 333.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 588.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -785.2 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 265481.54 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 136.3 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 516.1 MB). Peak memory consumption was 652.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while SimplifyDDAWithTimeout was simplifying term of DAG size 34. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. TIMEOUT Result, 265.4s OverallTime, 17 OverallIterations, 6 TraceHistogramMax, 20.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 340 SDtfs, 325 SDslu, 1817 SDs, 0 SdLazy, 2270 SolverSat, 103 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 7.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1508 GetRequests, 1098 SyntacticMatches, 54 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5213 ImplicationChecksByTransitivity, 153.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 72 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 204.4s InterpolantComputationTime, 1137 NumberOfCodeBlocks, 1117 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1751 ConstructedInterpolants, 242 QuantifiedInterpolants, 2011665 SizeOfPredicates, 214 NumberOfNonLiveVariables, 3068 ConjunctsInSsa, 606 ConjunctsInUnsatCore, 56 InterpolantComputations, 6 PerfectInterpolantSequences, 337/1332 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/linear_search_false-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_10-48-17-751.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/linear_search_false-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_10-48-17-751.csv Completed graceful shutdown