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/sum01_bug02_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 10:43:55,375 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 10:43:55,377 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 10:43:55,395 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 10:43:55,396 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 10:43:55,397 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 10:43:55,400 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 10:43:55,402 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 10:43:55,405 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 10:43:55,406 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 10:43:55,407 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 10:43:55,408 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 10:43:55,415 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 10:43:55,416 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 10:43:55,419 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 10:43:55,420 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 10:43:55,421 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 10:43:55,425 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 10:43:55,430 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 10:43:55,433 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 10:43:55,434 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 10:43:55,435 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 10:43:55,438 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 10:43:55,438 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 10:43:55,439 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 10:43:55,440 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 10:43:55,441 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 10:43:55,442 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 10:43:55,443 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 10:43:55,444 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 10:43:55,446 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 10:43:55,447 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 10:43:55,447 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 10:43:55,448 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 10:43:55,450 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 10:43:55,451 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 10:43:55,451 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 10:43:55,478 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 10:43:55,478 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 10:43:55,479 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 10:43:55,479 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 10:43:55,479 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 10:43:55,480 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 10:43:55,480 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 10:43:55,480 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 10:43:55,480 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 10:43:55,480 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 10:43:55,481 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 10:43:55,481 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 10:43:55,482 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 10:43:55,482 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 10:43:55,482 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 10:43:55,482 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 10:43:55,482 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 10:43:55,484 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 10:43:55,484 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 10:43:55,484 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 10:43:55,485 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 10:43:55,485 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 10:43:55,485 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 10:43:55,485 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 10:43:55,485 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 10:43:55,486 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 10:43:55,486 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 10:43:55,486 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 10:43:55,486 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 10:43:55,487 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 10:43:55,487 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 10:43:55,487 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 10:43:55,487 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 10:43:55,554 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 10:43:55,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 10:43:55,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 10:43:55,572 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 10:43:55,572 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 10:43:55,573 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-07-24 10:43:55,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966ff3cde/b98808e293de4ea0a573e46ec84956b2/FLAG62664f9d5 [2018-07-24 10:43:56,052 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 10:43:56,053 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-07-24 10:43:56,059 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966ff3cde/b98808e293de4ea0a573e46ec84956b2/FLAG62664f9d5 [2018-07-24 10:43:56,074 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966ff3cde/b98808e293de4ea0a573e46ec84956b2 [2018-07-24 10:43:56,084 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 10:43:56,085 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 10:43:56,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:56,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 10:43:56,092 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 10:43:56,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7930bb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56, skipping insertion in model container [2018-07-24 10:43:56,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,300 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 10:43:56,337 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:56,351 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 10:43:56,356 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:56,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56 WrapperNode [2018-07-24 10:43:56,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:56,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:56,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 10:43:56,370 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 10:43:56,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:56,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 10:43:56,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 10:43:56,394 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 10:43:56,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (1/1) ... [2018-07-24 10:43:56,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 10:43:56,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 10:43:56,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 10:43:56,416 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 10:43:56,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (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 10:43:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 10:43:56,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 10:43:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-24 10:43:56,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-24 10:43:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 10:43:56,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 10:43:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 10:43:56,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 10:43:56,759 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 10:43:56,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:56 BoogieIcfgContainer [2018-07-24 10:43:56,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 10:43:56,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 10:43:56,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 10:43:56,777 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 10:43:56,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 10:43:56" (1/3) ... [2018-07-24 10:43:56,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d670d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:56, skipping insertion in model container [2018-07-24 10:43:56,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:56" (2/3) ... [2018-07-24 10:43:56,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d670d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:56, skipping insertion in model container [2018-07-24 10:43:56,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:56" (3/3) ... [2018-07-24 10:43:56,781 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_false-unreach-call_true-termination.i [2018-07-24 10:43:56,811 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 10:43:56,827 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 10:43:56,895 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 10:43:56,896 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 10:43:56,896 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 10:43:56,896 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 10:43:56,896 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 10:43:56,896 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 10:43:56,897 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 10:43:56,897 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 10:43:56,897 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 10:43:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-07-24 10:43:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-24 10:43:56,921 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:56,922 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:56,923 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1682118937, now seen corresponding path program 1 times [2018-07-24 10:43:56,931 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:56,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:56,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:56,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:56,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:57,051 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 10:43:57,053 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:57,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-24 10:43:57,054 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:57,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-24 10:43:57,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-24 10:43:57,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:43:57,072 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-07-24 10:43:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:57,092 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-07-24 10:43:57,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 10:43:57,093 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-07-24 10:43:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:57,103 INFO L225 Difference]: With dead ends: 32 [2018-07-24 10:43:57,103 INFO L226 Difference]: Without dead ends: 15 [2018-07-24 10:43:57,107 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 10:43:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-24 10:43:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-24 10:43:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-24 10:43:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-07-24 10:43:57,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-07-24 10:43:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:57,143 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-07-24 10:43:57,143 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-24 10:43:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-07-24 10:43:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-24 10:43:57,144 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:57,145 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:57,145 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1082291569, now seen corresponding path program 1 times [2018-07-24 10:43:57,146 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:57,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:57,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,147 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:57,444 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 10:43:57,445 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:57,445 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 10:43:57,445 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:57,447 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 10:43:57,447 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 10:43:57,448 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:43:57,448 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-07-24 10:43:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:57,580 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-07-24 10:43:57,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:43:57,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-24 10:43:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:57,582 INFO L225 Difference]: With dead ends: 25 [2018-07-24 10:43:57,582 INFO L226 Difference]: Without dead ends: 20 [2018-07-24 10:43:57,584 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 10:43:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-24 10:43:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-24 10:43:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-24 10:43:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-07-24 10:43:57,591 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2018-07-24 10:43:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:57,592 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-07-24 10:43:57,592 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 10:43:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-07-24 10:43:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-24 10:43:57,593 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:57,593 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:57,593 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1112918305, now seen corresponding path program 1 times [2018-07-24 10:43:57,594 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:57,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:57,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:57,595 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:58,087 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-07-24 10:43:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:58,305 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:43:58,305 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 10:43:58,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:58,318 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:43:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:58,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:43:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:58,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:43:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:59,313 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:43:59,313 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 10:43:59,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:59,332 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:43:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:59,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:43:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:59,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:43:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:59,464 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:43:59,465 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 21 [2018-07-24 10:43:59,465 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:43:59,465 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 10:43:59,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 10:43:59,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-07-24 10:43:59,474 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 14 states. [2018-07-24 10:43:59,958 WARN L169 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-07-24 10:44:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:00,121 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-07-24 10:44:00,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 10:44:00,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-07-24 10:44:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:00,125 INFO L225 Difference]: With dead ends: 45 [2018-07-24 10:44:00,126 INFO L226 Difference]: Without dead ends: 39 [2018-07-24 10:44:00,127 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-07-24 10:44:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-24 10:44:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-07-24 10:44:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-24 10:44:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-07-24 10:44:00,134 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2018-07-24 10:44:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:00,134 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-07-24 10:44:00,135 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 10:44:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-07-24 10:44:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-24 10:44:00,136 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:00,136 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:00,136 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash -308962671, now seen corresponding path program 1 times [2018-07-24 10:44:00,137 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:00,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,138 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,208 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,208 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 10:44:00,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,221 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,423 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,423 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 10:44:00,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,440 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,486 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:00,486 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-07-24 10:44:00,486 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:00,487 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 10:44:00,488 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 10:44:00,488 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-07-24 10:44:00,488 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-07-24 10:44:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:00,603 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-07-24 10:44:00,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:44:00,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-07-24 10:44:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:00,607 INFO L225 Difference]: With dead ends: 42 [2018-07-24 10:44:00,607 INFO L226 Difference]: Without dead ends: 27 [2018-07-24 10:44:00,607 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-07-24 10:44:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-24 10:44:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-24 10:44:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-24 10:44:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-07-24 10:44:00,613 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2018-07-24 10:44:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:00,614 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-07-24 10:44:00,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 10:44:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-07-24 10:44:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-24 10:44:00,615 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:00,615 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:00,616 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash 734676191, now seen corresponding path program 2 times [2018-07-24 10:44:00,616 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:00,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,617 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 10:44:01,032 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,032 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) [2018-07-24 10:44:01,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:01,048 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:01,068 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:01,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:01,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,935 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,935 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 10:44:01,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:01,953 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:01,977 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:01,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:01,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:02,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:02,090 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:02,091 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 13, 13] total 30 [2018-07-24 10:44:02,091 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:02,092 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 10:44:02,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 10:44:02,093 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-07-24 10:44:02,093 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 19 states. [2018-07-24 10:44:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:03,001 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-07-24 10:44:03,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 10:44:03,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2018-07-24 10:44:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:03,002 INFO L225 Difference]: With dead ends: 50 [2018-07-24 10:44:03,002 INFO L226 Difference]: Without dead ends: 44 [2018-07-24 10:44:03,004 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2018-07-24 10:44:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-24 10:44:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2018-07-24 10:44:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-24 10:44:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-07-24 10:44:03,011 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2018-07-24 10:44:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:03,011 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-07-24 10:44:03,012 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 10:44:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-07-24 10:44:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-24 10:44:03,013 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:03,013 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:03,013 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1414734561, now seen corresponding path program 2 times [2018-07-24 10:44:03,014 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:03,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:03,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:03,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:03,015 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,085 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:03,085 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:03,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:03,093 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:03,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:03,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:03,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,264 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:03,264 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 10:44:03,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:03,280 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:03,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:03,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:03,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,349 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:03,349 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 16 [2018-07-24 10:44:03,349 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:03,350 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 10:44:03,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 10:44:03,350 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-07-24 10:44:03,351 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2018-07-24 10:44:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:03,448 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-07-24 10:44:03,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 10:44:03,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2018-07-24 10:44:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:03,457 INFO L225 Difference]: With dead ends: 44 [2018-07-24 10:44:03,457 INFO L226 Difference]: Without dead ends: 34 [2018-07-24 10:44:03,457 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-07-24 10:44:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-24 10:44:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-07-24 10:44:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-24 10:44:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-07-24 10:44:03,463 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2018-07-24 10:44:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:03,464 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-07-24 10:44:03,464 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 10:44:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-07-24 10:44:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-24 10:44:03,465 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:03,465 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:03,465 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash 927878289, now seen corresponding path program 3 times [2018-07-24 10:44:03,466 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:03,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:03,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:03,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:03,467 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,596 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:03,596 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 10:44:03,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:44:03,604 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:44:03,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-07-24 10:44:03,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:03,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:03,978 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:03,978 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 10:44:03,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:44:03,995 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:44:04,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-07-24 10:44:04,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:04,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:04,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:04,278 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:04,278 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 18 [2018-07-24 10:44:04,279 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:04,279 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 10:44:04,280 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 10:44:04,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-07-24 10:44:04,280 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2018-07-24 10:44:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:04,434 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-07-24 10:44:04,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 10:44:04,436 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-07-24 10:44:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:04,437 INFO L225 Difference]: With dead ends: 49 [2018-07-24 10:44:04,437 INFO L226 Difference]: Without dead ends: 39 [2018-07-24 10:44:04,438 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-07-24 10:44:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-24 10:44:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-07-24 10:44:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-24 10:44:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-07-24 10:44:04,444 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2018-07-24 10:44:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:04,444 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-07-24 10:44:04,444 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 10:44:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-07-24 10:44:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-24 10:44:04,445 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:04,446 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:04,446 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:04,446 INFO L82 PathProgramCache]: Analyzing trace with hash 473542881, now seen corresponding path program 4 times [2018-07-24 10:44:04,446 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:04,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:04,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:04,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:04,448 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:04,627 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:04,627 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 10:44:04,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:44:04,635 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:44:04,650 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:44:04,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:04,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:04,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:04,916 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:04,916 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 10:44:04,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:44:04,932 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:44:04,961 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:44:04,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:04,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:04,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:05,075 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:05,076 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-07-24 10:44:05,076 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:05,076 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 10:44:05,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 10:44:05,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-07-24 10:44:05,077 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-07-24 10:44:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:05,218 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-07-24 10:44:05,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 10:44:05,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-07-24 10:44:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:05,221 INFO L225 Difference]: With dead ends: 55 [2018-07-24 10:44:05,221 INFO L226 Difference]: Without dead ends: 45 [2018-07-24 10:44:05,222 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-07-24 10:44:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-24 10:44:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-07-24 10:44:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-24 10:44:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-07-24 10:44:05,229 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2018-07-24 10:44:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:05,230 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-07-24 10:44:05,230 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 10:44:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-07-24 10:44:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-24 10:44:05,231 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:05,231 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:05,231 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___bug___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:05,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1085243759, now seen corresponding path program 5 times [2018-07-24 10:44:05,232 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:05,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:05,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:05,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:05,233 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:44:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:44:05,283 INFO L419 BasicCegarLoop]: Counterexample might be feasible [2018-07-24 10:44:05,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 10:44:05 BoogieIcfgContainer [2018-07-24 10:44:05,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 10:44:05,315 INFO L168 Benchmark]: Toolchain (without parser) took 9230.49 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 728.8 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -154.7 MB). Peak memory consumption was 574.0 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:05,316 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 10:44:05,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.24 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 10:44:05,317 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.29 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 10:44:05,318 INFO L168 Benchmark]: Boogie Preprocessor took 21.85 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 10:44:05,318 INFO L168 Benchmark]: RCFGBuilder took 344.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 728.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:05,320 INFO L168 Benchmark]: TraceAbstraction took 8552.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 615.8 MB). Peak memory consumption was 615.8 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:05,324 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.24 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 23.29 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 21.85 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 344.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 728.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8552.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 615.8 MB). Peak memory consumption was 615.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i