java -Xss4m -Xmx6000000000 -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 ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-20 21:03:56,399 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-20 21:03:56,401 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-20 21:03:56,419 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-20 21:03:56,419 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-20 21:03:56,420 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-20 21:03:56,421 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-20 21:03:56,425 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-20 21:03:56,427 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-20 21:03:56,428 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-20 21:03:56,429 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-20 21:03:56,430 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-20 21:03:56,431 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-20 21:03:56,431 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-20 21:03:56,436 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-20 21:03:56,437 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-20 21:03:56,438 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-20 21:03:56,450 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-20 21:03:56,452 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-20 21:03:56,453 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-20 21:03:56,454 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-20 21:03:56,455 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-20 21:03:56,460 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-20 21:03:56,461 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-20 21:03:56,461 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-20 21:03:56,462 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-20 21:03:56,466 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-20 21:03:56,467 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-20 21:03:56,468 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-20 21:03:56,469 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-20 21:03:56,474 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-20 21:03:56,475 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-20 21:03:56,475 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-20 21:03:56,475 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-20 21:03:56,476 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-20 21:03:56,477 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-20 21:03:56,477 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-07-20 21:03:56,501 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-20 21:03:56,501 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-20 21:03:56,502 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-20 21:03:56,502 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-20 21:03:56,503 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-20 21:03:56,503 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-20 21:03:56,503 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-20 21:03:56,503 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-20 21:03:56,503 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-20 21:03:56,504 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-20 21:03:56,504 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-07-20 21:03:56,504 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-20 21:03:56,505 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-20 21:03:56,505 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-20 21:03:56,505 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-20 21:03:56,505 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-20 21:03:56,505 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-20 21:03:56,507 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-20 21:03:56,507 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-20 21:03:56,507 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-20 21:03:56,507 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-20 21:03:56,508 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-20 21:03:56,508 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-20 21:03:56,508 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-20 21:03:56,508 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-20 21:03:56,508 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-20 21:03:56,509 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-20 21:03:56,509 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-20 21:03:56,509 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-20 21:03:56,509 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-20 21:03:56,509 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-20 21:03:56,509 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-20 21:03:56,510 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-20 21:03:56,510 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-20 21:03:56,510 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-20 21:03:56,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-20 21:03:56,579 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-20 21:03:56,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-20 21:03:56,585 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-20 21:03:56,586 INFO L276 PluginConnector]: CDTParser initialized [2018-07-20 21:03:56,587 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-07-20 21:03:56,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/fb668282e/bf6e970796e94fc287e0a2930e5957cc/FLAG61dbab7cf [2018-07-20 21:03:57,154 INFO L276 CDTParser]: Found 1 translation units. [2018-07-20 21:03:57,154 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-07-20 21:03:57,160 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/fb668282e/bf6e970796e94fc287e0a2930e5957cc/FLAG61dbab7cf [2018-07-20 21:03:57,173 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/fb668282e/bf6e970796e94fc287e0a2930e5957cc [2018-07-20 21:03:57,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-20 21:03:57,189 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-20 21:03:57,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-20 21:03:57,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-20 21:03:57,200 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-20 21:03:57,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3108fd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57, skipping insertion in model container [2018-07-20 21:03:57,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,350 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-20 21:03:57,389 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-20 21:03:57,408 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-20 21:03:57,414 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-20 21:03:57,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57 WrapperNode [2018-07-20 21:03:57,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-20 21:03:57,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-20 21:03:57,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-20 21:03:57,431 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-20 21:03:57,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-20 21:03:57,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-20 21:03:57,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-20 21:03:57,455 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-20 21:03:57,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... [2018-07-20 21:03:57,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-20 21:03:57,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-20 21:03:57,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-20 21:03:57,480 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-20 21:03:57,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (1/1) ... No working directory specified, using /storage/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 [2018-07-20 21:03:57,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-20 21:03:57,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-20 21:03:57,533 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-20 21:03:57,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-20 21:03:57,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-20 21:03:57,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-20 21:03:57,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-20 21:03:57,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-20 21:03:57,811 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-20 21:03:57,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:03:57 BoogieIcfgContainer [2018-07-20 21:03:57,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-20 21:03:57,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-20 21:03:57,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-20 21:03:57,824 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-20 21:03:57,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:03:57" (1/3) ... [2018-07-20 21:03:57,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2a3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:03:57, skipping insertion in model container [2018-07-20 21:03:57,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:57" (2/3) ... [2018-07-20 21:03:57,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2a3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:03:57, skipping insertion in model container [2018-07-20 21:03:57,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:03:57" (3/3) ... [2018-07-20 21:03:57,828 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_false-unreach-call_true-termination.i [2018-07-20 21:03:57,841 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-20 21:03:57,849 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-20 21:03:57,886 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-20 21:03:57,887 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-20 21:03:57,887 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-20 21:03:57,887 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-20 21:03:57,887 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-20 21:03:57,887 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-20 21:03:57,887 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-20 21:03:57,888 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-20 21:03:57,888 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-20 21:03:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-07-20 21:03:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-20 21:03:57,906 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:03:57,907 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:03:57,907 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:03:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2038308009, now seen corresponding path program 1 times [2018-07-20 21:03:57,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:03:57,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:57,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:03:57,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:57,959 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:03:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:03:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:58,022 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-20 21:03:58,022 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-20 21:03:58,022 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:03:58,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-20 21:03:58,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-20 21:03:58,035 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-20 21:03:58,037 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-07-20 21:03:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:03:58,055 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-07-20 21:03:58,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-20 21:03:58,057 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-07-20 21:03:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:03:58,064 INFO L225 Difference]: With dead ends: 31 [2018-07-20 21:03:58,064 INFO L226 Difference]: Without dead ends: 14 [2018-07-20 21:03:58,068 INFO L578 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 [2018-07-20 21:03:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-20 21:03:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-20 21:03:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-20 21:03:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-07-20 21:03:58,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-07-20 21:03:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:03:58,117 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-07-20 21:03:58,117 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-20 21:03:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-07-20 21:03:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-20 21:03:58,117 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:03:58,118 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:03:58,118 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:03:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1654127473, now seen corresponding path program 1 times [2018-07-20 21:03:58,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:03:58,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:58,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:03:58,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:58,122 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:03:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:03:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:58,213 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-20 21:03:58,213 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-20 21:03:58,213 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:03:58,216 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-20 21:03:58,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-20 21:03:58,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-20 21:03:58,217 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-07-20 21:03:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:03:58,336 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-07-20 21:03:58,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-20 21:03:58,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-07-20 21:03:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:03:58,338 INFO L225 Difference]: With dead ends: 27 [2018-07-20 21:03:58,339 INFO L226 Difference]: Without dead ends: 18 [2018-07-20 21:03:58,340 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-20 21:03:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-20 21:03:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-20 21:03:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-20 21:03:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-07-20 21:03:58,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-07-20 21:03:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:03:58,345 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-07-20 21:03:58,345 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-20 21:03:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-07-20 21:03:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-20 21:03:58,346 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:03:58,346 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:03:58,347 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:03:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1318760104, now seen corresponding path program 1 times [2018-07-20 21:03:58,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:03:58,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:58,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:03:58,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:58,349 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:03:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:03:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:58,424 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:03:58,424 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:03:58,425 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-07-20 21:03:58,427 INFO L201 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [22], [24], [27], [31], [37], [38], [39], [41] [2018-07-20 21:03:58,467 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-20 21:03:58,467 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-20 21:03:58,803 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-07-20 21:03:58,807 INFO L272 AbstractInterpreter]: Visited 10 different actions 65 times. Merged at 4 different actions 44 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-07-20 21:03:58,858 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-07-20 21:03:58,944 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-07-20 21:03:58,944 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-07-20 21:03:59,010 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-07-20 21:03:59,011 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-07-20 21:03:59,012 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-07-20 21:03:59,012 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:03:59,012 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-20 21:03:59,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-20 21:03:59,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-20 21:03:59,013 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-07-20 21:03:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:03:59,151 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-07-20 21:03:59,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-20 21:03:59,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-07-20 21:03:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:03:59,152 INFO L225 Difference]: With dead ends: 27 [2018-07-20 21:03:59,153 INFO L226 Difference]: Without dead ends: 22 [2018-07-20 21:03:59,153 INFO L578 BasicCegarLoop]: 2 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-20 21:03:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-20 21:03:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-07-20 21:03:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-20 21:03:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-07-20 21:03:59,159 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2018-07-20 21:03:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:03:59,159 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-07-20 21:03:59,159 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-20 21:03:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-07-20 21:03:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-20 21:03:59,160 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:03:59,161 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:03:59,161 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:03:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2001769633, now seen corresponding path program 1 times [2018-07-20 21:03:59,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:03:59,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:59,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:03:59,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:59,163 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:03:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:03:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:59,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:03:59,231 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:03:59,231 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-07-20 21:03:59,232 INFO L201 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [22], [24], [27], [29], [31], [37], [38], [39], [41] [2018-07-20 21:03:59,233 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-20 21:03:59,234 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-20 21:03:59,444 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-20 21:03:59,445 INFO L272 AbstractInterpreter]: Visited 15 different actions 138 times. Merged at 6 different actions 75 times. Widened at 1 different actions 11 times. Found 14 fixpoints after 4 different actions. Largest state had 3 variables. [2018-07-20 21:03:59,485 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-20 21:03:59,485 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:03:59,485 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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 [2018-07-20 21:03:59,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:03:59,497 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:03:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:03:59,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:03:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:59,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:03:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:59,650 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:03:59,650 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/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 [2018-07-20 21:03:59,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:03:59,665 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:03:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:03:59,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:03:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:59,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:03:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:03:59,765 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:03:59,765 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 5 [2018-07-20 21:03:59,765 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:03:59,765 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-20 21:03:59,766 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-20 21:03:59,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-20 21:03:59,766 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2018-07-20 21:03:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:03:59,918 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-07-20 21:03:59,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-20 21:03:59,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-07-20 21:03:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:03:59,921 INFO L225 Difference]: With dead ends: 35 [2018-07-20 21:03:59,921 INFO L226 Difference]: Without dead ends: 26 [2018-07-20 21:03:59,921 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-20 21:03:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-20 21:03:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-07-20 21:03:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-20 21:03:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-07-20 21:03:59,932 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2018-07-20 21:03:59,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:03:59,933 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-07-20 21:03:59,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-20 21:03:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-07-20 21:03:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-20 21:03:59,935 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:03:59,935 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:03:59,935 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:03:59,936 INFO L82 PathProgramCache]: Analyzing trace with hash 173793064, now seen corresponding path program 2 times [2018-07-20 21:03:59,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:03:59,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:59,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:03:59,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:03:59,937 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:03:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:04:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:00,025 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:00,026 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:04:00,026 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:04:00,026 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:04:00,026 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:00,026 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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) [2018-07-20 21:04:00,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:04:00,044 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:04:00,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:04:00,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:04:00,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:04:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:00,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:04:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:00,357 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:00,357 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/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 [2018-07-20 21:04:00,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:04:00,372 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:04:00,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:04:00,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:04:00,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:04:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:00,408 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:04:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:00,432 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:04:00,433 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 5] total 10 [2018-07-20 21:04:00,433 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:04:00,433 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-20 21:04:00,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-20 21:04:00,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:04:00,434 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2018-07-20 21:04:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:04:00,498 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2018-07-20 21:04:00,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-20 21:04:00,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-07-20 21:04:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:04:00,502 INFO L225 Difference]: With dead ends: 51 [2018-07-20 21:04:00,502 INFO L226 Difference]: Without dead ends: 42 [2018-07-20 21:04:00,503 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:04:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-20 21:04:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2018-07-20 21:04:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-20 21:04:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-07-20 21:04:00,510 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 23 [2018-07-20 21:04:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:04:00,511 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-07-20 21:04:00,511 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-20 21:04:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-07-20 21:04:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-20 21:04:00,512 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:04:00,512 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:04:00,512 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:04:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash -974457345, now seen corresponding path program 3 times [2018-07-20 21:04:00,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:04:00,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:04:00,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:04:00,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:04:00,514 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:04:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:04:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:00,623 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:00,623 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:04:00,623 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:04:00,623 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:04:00,624 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:00,624 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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) [2018-07-20 21:04:00,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:04:00,640 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:04:00,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-20 21:04:00,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:04:00,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:04:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-20 21:04:00,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:04:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-20 21:04:01,198 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:01,198 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/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 [2018-07-20 21:04:01,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:04:01,213 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:04:01,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-20 21:04:01,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:04:01,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:04:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-20 21:04:01,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:04:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-20 21:04:01,304 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:04:01,304 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 7, 7] total 10 [2018-07-20 21:04:01,304 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:04:01,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-20 21:04:01,305 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-20 21:04:01,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:04:01,306 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2018-07-20 21:04:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:04:01,348 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-07-20 21:04:01,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-20 21:04:01,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-07-20 21:04:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:04:01,350 INFO L225 Difference]: With dead ends: 47 [2018-07-20 21:04:01,350 INFO L226 Difference]: Without dead ends: 42 [2018-07-20 21:04:01,351 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:04:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-20 21:04:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2018-07-20 21:04:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-20 21:04:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-07-20 21:04:01,359 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-07-20 21:04:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:04:01,360 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-07-20 21:04:01,361 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-20 21:04:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-07-20 21:04:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-20 21:04:01,362 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:04:01,362 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:04:01,362 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:04:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash -487299962, now seen corresponding path program 4 times [2018-07-20 21:04:01,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:04:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:04:01,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:04:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:04:01,364 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:04:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:04:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:01,477 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:01,477 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:04:01,477 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:04:01,477 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:04:01,477 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:01,477 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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 [2018-07-20 21:04:01,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:04:01,483 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-20 21:04:01,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:04:01,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:04:01,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:04:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:01,515 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:04:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:01,612 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:04:01,612 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/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 [2018-07-20 21:04:01,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:04:01,627 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-20 21:04:01,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:04:01,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:04:01,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:04:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:01,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:04:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:04:01,755 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:04:01,756 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 10 [2018-07-20 21:04:01,756 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:04:01,756 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-20 21:04:01,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-20 21:04:01,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:04:01,757 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2018-07-20 21:04:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:04:01,845 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-07-20 21:04:01,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-20 21:04:01,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-07-20 21:04:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:04:01,847 INFO L225 Difference]: With dead ends: 49 [2018-07-20 21:04:01,847 INFO L226 Difference]: Without dead ends: 44 [2018-07-20 21:04:01,848 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 142 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:04:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-20 21:04:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-20 21:04:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-20 21:04:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-07-20 21:04:01,855 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2018-07-20 21:04:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:04:01,856 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-07-20 21:04:01,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-20 21:04:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-07-20 21:04:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-20 21:04:01,857 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:04:01,857 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:04:01,858 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:04:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1761949581, now seen corresponding path program 5 times [2018-07-20 21:04:01,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:04:01,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:04:01,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:04:01,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:04:01,859 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:04:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-20 21:04:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-20 21:04:01,907 INFO L424 BasicCegarLoop]: Counterexample might be feasible [2018-07-20 21:04:01,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:04:01 BoogieIcfgContainer [2018-07-20 21:04:01,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-20 21:04:01,930 INFO L168 Benchmark]: Toolchain (without parser) took 4746.46 ms. Allocated memory was 305.1 MB in the beginning and 484.4 MB in the end (delta: 179.3 MB). Free memory was 251.5 MB in the beginning and 327.9 MB in the end (delta: -76.3 MB). Peak memory consumption was 103.0 MB. Max. memory is 5.3 GB. [2018-07-20 21:04:01,932 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 305.1 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-07-20 21:04:01,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.13 ms. Allocated memory is still 305.1 MB. Free memory was 250.6 MB in the beginning and 241.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. [2018-07-20 21:04:01,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.78 ms. Allocated memory is still 305.1 MB. Free memory was 241.5 MB in the beginning and 240.5 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 5.3 GB. [2018-07-20 21:04:01,934 INFO L168 Benchmark]: Boogie Preprocessor took 24.28 ms. Allocated memory is still 305.1 MB. Free memory was 240.5 MB in the beginning and 239.5 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 5.3 GB. [2018-07-20 21:04:01,934 INFO L168 Benchmark]: RCFGBuilder took 333.00 ms. Allocated memory was 305.1 MB in the beginning and 467.1 MB in the end (delta: 162.0 MB). Free memory was 239.5 MB in the beginning and 437.8 MB in the end (delta: -198.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 5.3 GB. [2018-07-20 21:04:01,935 INFO L168 Benchmark]: TraceAbstraction took 4116.02 ms. Allocated memory was 467.1 MB in the beginning and 484.4 MB in the end (delta: 17.3 MB). Free memory was 437.8 MB in the beginning and 327.9 MB in the end (delta: 109.9 MB). Peak memory consumption was 127.2 MB. Max. memory is 5.3 GB. [2018-07-20 21:04:01,938 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 305.1 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 239.13 ms. Allocated memory is still 305.1 MB. Free memory was 250.6 MB in the beginning and 241.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. * Boogie Procedure Inliner took 24.78 ms. Allocated memory is still 305.1 MB. Free memory was 241.5 MB in the beginning and 240.5 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 5.3 GB. * Boogie Preprocessor took 24.28 ms. Allocated memory is still 305.1 MB. Free memory was 240.5 MB in the beginning and 239.5 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 5.3 GB. * RCFGBuilder took 333.00 ms. Allocated memory was 305.1 MB in the beginning and 467.1 MB in the end (delta: 162.0 MB). Free memory was 239.5 MB in the beginning and 437.8 MB in the end (delta: -198.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 5.3 GB. * TraceAbstraction took 4116.02 ms. Allocated memory was 467.1 MB in the beginning and 484.4 MB in the end (delta: 17.3 MB). Free memory was 437.8 MB in the beginning and 327.9 MB in the end (delta: 109.9 MB). Peak memory consumption was 127.2 MB. Max. memory is 5.3 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, sn=0; [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ [L13] i++ [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ [L13] i++ [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ [L13] i++ [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ [L13] i++ [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ [L13] i++ [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ [L13] i++ [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ [L13] i++ [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ [L13] i++ [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 4.0s OverallTime, 8 OverallIterations, 9 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 89 SDtfs, 64 SDslu, 138 SDs, 0 SdLazy, 117 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 503 GetRequests, 441 SyntacticMatches, 32 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.9761904761904763 AbsIntWeakeningRatio, 0.35714285714285715 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 427 NumberOfCodeBlocks, 417 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 593 ConstructedInterpolants, 0 QuantifiedInterpolants, 38553 SizeOfPredicates, 9 NumberOfNonLiveVariables, 394 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 269/982 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum04_false-unreach-call_true-termination.i_svcomp-Reach-64bit-Taipan_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-20_21-04-01-950.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum04_false-unreach-call_true-termination.i_svcomp-Reach-64bit-Taipan_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-20_21-04-01-950.csv Received shutdown request...