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/sum04_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 10:43:57,765 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 10:43:57,767 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 10:43:57,779 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 10:43:57,779 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 10:43:57,780 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 10:43:57,782 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 10:43:57,784 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 10:43:57,785 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 10:43:57,786 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 10:43:57,787 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 10:43:57,787 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 10:43:57,788 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 10:43:57,789 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 10:43:57,790 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 10:43:57,791 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 10:43:57,795 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 10:43:57,797 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 10:43:57,799 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 10:43:57,801 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 10:43:57,802 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 10:43:57,803 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 10:43:57,805 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 10:43:57,806 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 10:43:57,806 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 10:43:57,807 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 10:43:57,808 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 10:43:57,808 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 10:43:57,809 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 10:43:57,810 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 10:43:57,811 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 10:43:57,811 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 10:43:57,811 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 10:43:57,812 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 10:43:57,813 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 10:43:57,813 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 10:43:57,814 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 10:43:57,829 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 10:43:57,829 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 10:43:57,830 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 10:43:57,830 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 10:43:57,830 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 10:43:57,831 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 10:43:57,831 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 10:43:57,831 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 10:43:57,831 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 10:43:57,831 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 10:43:57,831 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 10:43:57,832 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 10:43:57,832 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 10:43:57,833 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 10:43:57,833 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 10:43:57,833 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 10:43:57,833 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 10:43:57,833 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 10:43:57,834 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 10:43:57,834 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 10:43:57,834 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 10:43:57,834 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 10:43:57,834 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 10:43:57,834 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 10:43:57,835 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 10:43:57,835 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 10:43:57,835 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 10:43:57,835 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 10:43:57,835 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 10:43:57,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 10:43:57,836 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 10:43:57,836 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 10:43:57,836 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 10:43:57,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 10:43:57,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 10:43:57,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 10:43:57,920 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 10:43:57,921 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 10:43:57,922 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-07-24 10:43:58,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38281e8ab/46399fdf61fb4b8ba17f3fd88efc04be/FLAGf12a86076 [2018-07-24 10:43:58,441 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 10:43:58,441 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04_false-unreach-call_true-termination.i [2018-07-24 10:43:58,448 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38281e8ab/46399fdf61fb4b8ba17f3fd88efc04be/FLAGf12a86076 [2018-07-24 10:43:58,465 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38281e8ab/46399fdf61fb4b8ba17f3fd88efc04be [2018-07-24 10:43:58,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 10:43:58,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 10:43:58,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:58,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 10:43:58,488 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 10:43:58,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b63e061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58, skipping insertion in model container [2018-07-24 10:43:58,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,691 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 10:43:58,727 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:58,742 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 10:43:58,747 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:43:58,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58 WrapperNode [2018-07-24 10:43:58,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 10:43:58,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:58,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 10:43:58,762 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 10:43:58,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 10:43:58,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 10:43:58,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 10:43:58,784 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 10:43:58,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (1/1) ... [2018-07-24 10:43:58,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 10:43:58,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 10:43:58,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 10:43:58,810 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 10:43:58,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (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 10:43:58,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 10:43:58,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 10:43:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-24 10:43:58,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assert [2018-07-24 10:43:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 10:43:58,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 10:43:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 10:43:58,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 10:43:59,112 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 10:43:59,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:59 BoogieIcfgContainer [2018-07-24 10:43:59,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 10:43:59,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 10:43:59,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 10:43:59,117 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 10:43:59,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 10:43:58" (1/3) ... [2018-07-24 10:43:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da670ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:59, skipping insertion in model container [2018-07-24 10:43:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:43:58" (2/3) ... [2018-07-24 10:43:59,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da670ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:43:59, skipping insertion in model container [2018-07-24 10:43:59,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:43:59" (3/3) ... [2018-07-24 10:43:59,121 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_false-unreach-call_true-termination.i [2018-07-24 10:43:59,131 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 10:43:59,139 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 10:43:59,188 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 10:43:59,189 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 10:43:59,189 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 10:43:59,189 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 10:43:59,189 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 10:43:59,190 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 10:43:59,190 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 10:43:59,190 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 10:43:59,190 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 10:43:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-07-24 10:43:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-24 10:43:59,215 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:59,216 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:59,216 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2038308009, now seen corresponding path program 1 times [2018-07-24 10:43:59,227 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:59,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:59,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:59,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:59,278 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:59,339 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 10:43:59,341 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:59,342 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-24 10:43:59,342 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:59,346 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-24 10:43:59,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-24 10:43:59,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:43:59,360 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-07-24 10:43:59,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:59,382 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-07-24 10:43:59,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 10:43:59,383 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-07-24 10:43:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:59,392 INFO L225 Difference]: With dead ends: 31 [2018-07-24 10:43:59,392 INFO L226 Difference]: Without dead ends: 14 [2018-07-24 10:43:59,395 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 10:43:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-24 10:43:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-24 10:43:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-24 10:43:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-07-24 10:43:59,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-07-24 10:43:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:59,433 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-07-24 10:43:59,434 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-24 10:43:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-07-24 10:43:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-24 10:43:59,435 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:59,435 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:59,435 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1654127473, now seen corresponding path program 1 times [2018-07-24 10:43:59,436 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:59,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:59,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:59,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:59,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:59,521 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 10:43:59,521 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:43:59,522 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 10:43:59,522 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:43:59,525 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 10:43:59,525 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 10:43:59,525 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:43:59,526 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-07-24 10:43:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:43:59,642 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-07-24 10:43:59,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 10:43:59,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-07-24 10:43:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:43:59,644 INFO L225 Difference]: With dead ends: 27 [2018-07-24 10:43:59,644 INFO L226 Difference]: Without dead ends: 18 [2018-07-24 10:43:59,645 INFO L573 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 [2018-07-24 10:43:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-24 10:43:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-07-24 10:43:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-24 10:43:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-07-24 10:43:59,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-07-24 10:43:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:43:59,651 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-07-24 10:43:59,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 10:43:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-07-24 10:43:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-24 10:43:59,653 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:43:59,653 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:43:59,653 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:43:59,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1318760104, now seen corresponding path program 1 times [2018-07-24 10:43:59,654 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:43:59,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:59,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:59,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:43:59,655 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:43:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:59,738 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 10:43:59,738 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:43:59,739 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 10:43:59,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:43:59,757 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:43:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:43:59,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:43:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:43:59,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:43:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,018 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 10:44:00,018 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2018-07-24 10:44:00,018 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:44:00,019 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:44:00,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:44:00,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-24 10:44:00,020 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-07-24 10:44:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:00,091 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-07-24 10:44:00,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 10:44:00,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-07-24 10:44:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:00,095 INFO L225 Difference]: With dead ends: 27 [2018-07-24 10:44:00,096 INFO L226 Difference]: Without dead ends: 22 [2018-07-24 10:44:00,096 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-24 10:44:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-24 10:44:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-07-24 10:44:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-24 10:44:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-07-24 10:44:00,103 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2018-07-24 10:44:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:00,104 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-07-24 10:44:00,104 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:44:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-07-24 10:44:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-24 10:44:00,105 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:00,105 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:00,105 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2001769633, now seen corresponding path program 1 times [2018-07-24 10:44:00,106 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:00,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,107 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,208 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,211 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:00,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,220 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,474 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,474 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 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:44:00,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,499 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:44:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (4)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 10:44:00,557 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:00,557 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 5 [2018-07-24 10:44:00,557 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:00,558 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:44:00,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:44:00,559 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:44:00,559 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-07-24 10:44:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:00,619 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-07-24 10:44:00,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 10:44:00,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-07-24 10:44:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:00,621 INFO L225 Difference]: With dead ends: 37 [2018-07-24 10:44:00,621 INFO L226 Difference]: Without dead ends: 25 [2018-07-24 10:44:00,622 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 10:44:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-24 10:44:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-07-24 10:44:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-24 10:44:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-07-24 10:44:00,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-07-24 10:44:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:00,628 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-07-24 10:44:00,628 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:44:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-07-24 10:44:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-24 10:44:00,629 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:00,629 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:00,629 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash 173793064, now seen corresponding path program 2 times [2018-07-24 10:44:00,630 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:00,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:44:00,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:00,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,697 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:00,698 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:00,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:00,715 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:00,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:00,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:00,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:00,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,051 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,051 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:44:01,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:44:01,068 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:44:01,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:44:01,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:01,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,097 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,146 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:01,146 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 5] total 10 [2018-07-24 10:44:01,146 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:01,147 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 10:44:01,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 10:44:01,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:01,148 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-07-24 10:44:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:01,235 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2018-07-24 10:44:01,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 10:44:01,236 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-07-24 10:44:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:01,240 INFO L225 Difference]: With dead ends: 50 [2018-07-24 10:44:01,240 INFO L226 Difference]: Without dead ends: 38 [2018-07-24 10:44:01,241 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-24 10:44:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-07-24 10:44:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-24 10:44:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-07-24 10:44:01,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 23 [2018-07-24 10:44:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:01,248 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-07-24 10:44:01,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 10:44:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-07-24 10:44:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-24 10:44:01,250 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:01,250 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:01,250 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash -974457345, now seen corresponding path program 3 times [2018-07-24 10:44:01,251 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:01,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:01,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:01,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:01,252 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:01,760 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,760 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:01,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:44:01,776 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:44:01,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-24 10:44:01,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:01,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 10:44:01,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 10:44:01,928 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:01,928 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:44:01,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:44:01,945 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:44:01,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-24 10:44:01,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:01,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 10:44:02,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-07-24 10:44:02,082 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:02,082 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 7, 7] total 10 [2018-07-24 10:44:02,083 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:02,084 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 10:44:02,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 10:44:02,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:02,084 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2018-07-24 10:44:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:02,192 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-07-24 10:44:02,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 10:44:02,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-07-24 10:44:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:02,194 INFO L225 Difference]: With dead ends: 47 [2018-07-24 10:44:02,194 INFO L226 Difference]: Without dead ends: 42 [2018-07-24 10:44:02,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-24 10:44:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2018-07-24 10:44:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-24 10:44:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-07-24 10:44:02,201 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-07-24 10:44:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:02,202 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-07-24 10:44:02,202 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 10:44:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-07-24 10:44:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-24 10:44:02,203 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:02,204 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:02,204 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:02,204 INFO L82 PathProgramCache]: Analyzing trace with hash -487299962, now seen corresponding path program 4 times [2018-07-24 10:44:02,204 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:02,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:02,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:02,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:02,206 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:44:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:02,376 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:02,376 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 10:44:02,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:44:02,384 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:44:02,401 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:44:02,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:02,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:02,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:02,578 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:44:02,578 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 10:44:02,595 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:44:02,595 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:44:02,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:44:02,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:44:02,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:44:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:02,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:44:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:44:02,910 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:44:02,910 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 10 [2018-07-24 10:44:02,911 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:44:02,911 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 10:44:02,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 10:44:02,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:02,912 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2018-07-24 10:44:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:44:03,021 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-07-24 10:44:03,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 10:44:03,023 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-07-24 10:44:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:44:03,024 INFO L225 Difference]: With dead ends: 49 [2018-07-24 10:44:03,024 INFO L226 Difference]: Without dead ends: 44 [2018-07-24 10:44:03,025 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 142 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-24 10:44:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-24 10:44:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-24 10:44:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-24 10:44:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-07-24 10:44:03,031 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2018-07-24 10:44:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:44:03,031 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-07-24 10:44:03,032 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 10:44:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-07-24 10:44:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-24 10:44:03,033 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:44:03,033 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:44:03,033 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_sum___false_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:44:03,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1761949581, now seen corresponding path program 5 times [2018-07-24 10:44:03,034 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:44:03,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:03,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:44:03,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:44:03,035 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:44:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:44:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:44:03,080 INFO L419 BasicCegarLoop]: Counterexample might be feasible [2018-07-24 10:44:03,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 10:44:03 BoogieIcfgContainer [2018-07-24 10:44:03,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 10:44:03,108 INFO L168 Benchmark]: Toolchain (without parser) took 4629.47 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 710.9 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -482.8 MB). Peak memory consumption was 228.1 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:03,110 INFO L168 Benchmark]: CDTParser took 0.25 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 10:44:03,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.53 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 10:44:03,111 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.06 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 10:44:03,111 INFO L168 Benchmark]: Boogie Preprocessor took 25.24 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 10:44:03,112 INFO L168 Benchmark]: RCFGBuilder took 303.54 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 710.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -762.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:03,113 INFO L168 Benchmark]: TraceAbstraction took 3993.17 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 268.9 MB). Peak memory consumption was 268.9 MB. Max. memory is 7.1 GB. [2018-07-24 10:44:03,117 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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. * CACSL2BoogieTranslator took 280.53 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 22.06 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 25.24 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 303.54 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 710.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -762.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3993.17 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 268.9 MB). Peak memory consumption was 268.9 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, 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, 3.9s OverallTime, 8 OverallIterations, 9 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 89 SDtfs, 59 SDslu, 178 SDs, 0 SdLazy, 126 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 522 GetRequests, 456 SyntacticMatches, 32 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.9s 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, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 442 NumberOfCodeBlocks, 432 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 621 ConstructedInterpolants, 0 QuantifiedInterpolants, 39113 SizeOfPredicates, 11 NumberOfNonLiveVariables, 426 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 273/986 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/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/sum04_false-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_10-44-03-129.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/sum04_false-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_10-44-03-129.csv Received shutdown request...