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_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-20 21:15:24,793 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-20 21:15:24,797 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-20 21:15:24,810 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-20 21:15:24,810 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-20 21:15:24,811 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-20 21:15:24,812 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-20 21:15:24,819 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-20 21:15:24,821 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-20 21:15:24,823 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-20 21:15:24,824 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-20 21:15:24,824 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-20 21:15:24,825 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-20 21:15:24,826 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-20 21:15:24,829 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-20 21:15:24,830 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-20 21:15:24,831 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-20 21:15:24,832 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-20 21:15:24,842 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-20 21:15:24,843 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-20 21:15:24,844 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-20 21:15:24,845 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-20 21:15:24,850 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-20 21:15:24,861 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 21:15:24,883 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-20 21:15:24,883 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-20 21:15:24,884 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-20 21:15:24,884 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-20 21:15:24,884 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-20 21:15:24,884 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-20 21:15:24,885 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-20 21:15:24,885 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-20 21:15:24,885 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-20 21:15:24,885 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-20 21:15:24,885 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-07-20 21:15:24,885 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-20 21:15:24,886 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-20 21:15:24,886 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-20 21:15:24,886 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-20 21:15:24,887 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-20 21:15:24,887 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-20 21:15:24,887 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-20 21:15:24,887 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-20 21:15:24,887 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-20 21:15:24,888 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-20 21:15:24,888 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-20 21:15:24,888 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-20 21:15:24,888 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-20 21:15:24,888 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-20 21:15:24,889 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-20 21:15:24,890 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-20 21:15:24,890 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-20 21:15:24,890 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-20 21:15:24,890 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-07-20 21:15:24,891 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-20 21:15:24,891 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-20 21:15:24,891 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-20 21:15:24,891 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-20 21:15:24,891 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-20 21:15:24,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-20 21:15:24,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-20 21:15:24,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-20 21:15:24,960 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-20 21:15:24,960 INFO L276 PluginConnector]: CDTParser initialized [2018-07-20 21:15:24,961 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-07-20 21:15:25,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/341792e16/4bdc45cb0dd1494490deb8796cacd8db/FLAG8db8fbf0e [2018-07-20 21:15:25,466 INFO L276 CDTParser]: Found 1 translation units. [2018-07-20 21:15:25,466 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-07-20 21:15:25,474 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/341792e16/4bdc45cb0dd1494490deb8796cacd8db/FLAG8db8fbf0e [2018-07-20 21:15:25,487 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/341792e16/4bdc45cb0dd1494490deb8796cacd8db [2018-07-20 21:15:25,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-20 21:15:25,507 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-20 21:15:25,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-20 21:15:25,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-20 21:15:25,522 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-20 21:15:25,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a16f28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25, skipping insertion in model container [2018-07-20 21:15:25,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,719 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-20 21:15:25,760 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-20 21:15:25,774 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-20 21:15:25,778 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-20 21:15:25,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25 WrapperNode [2018-07-20 21:15:25,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-20 21:15:25,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-20 21:15:25,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-20 21:15:25,793 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-20 21:15:25,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-20 21:15:25,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-20 21:15:25,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-20 21:15:25,814 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-20 21:15:25,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (1/1) ... [2018-07-20 21:15:25,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-20 21:15:25,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-20 21:15:25,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-20 21:15:25,836 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-20 21:15:25,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (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 21:15:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-20 21:15:25,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-20 21:15:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-20 21:15:25,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-20 21:15:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-20 21:15:25,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-20 21:15:25,899 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assert [2018-07-20 21:15:25,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assert [2018-07-20 21:15:26,141 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-20 21:15:26,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:15:26 BoogieIcfgContainer [2018-07-20 21:15:26,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-20 21:15:26,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-20 21:15:26,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-20 21:15:26,146 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-20 21:15:26,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:15:25" (1/3) ... [2018-07-20 21:15:26,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397cb411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:15:26, skipping insertion in model container [2018-07-20 21:15:26,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:15:25" (2/3) ... [2018-07-20 21:15:26,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397cb411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:15:26, skipping insertion in model container [2018-07-20 21:15:26,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:15:26" (3/3) ... [2018-07-20 21:15:26,150 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_true-unreach-call_true-termination.i [2018-07-20 21:15:26,159 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-20 21:15:26,166 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-20 21:15:26,213 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-20 21:15:26,213 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-20 21:15:26,214 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-20 21:15:26,214 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-20 21:15:26,214 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-20 21:15:26,214 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-20 21:15:26,214 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-20 21:15:26,214 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-20 21:15:26,215 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-20 21:15:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-07-20 21:15:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-20 21:15:26,240 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:26,241 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:26,241 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:26,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1870586046, now seen corresponding path program 1 times [2018-07-20 21:15:26,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:26,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:26,287 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:26,346 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 21:15:26,347 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-20 21:15:26,348 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-20 21:15:26,348 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:15:26,350 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-20 21:15:26,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-20 21:15:26,360 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-20 21:15:26,362 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-07-20 21:15:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:26,381 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-07-20 21:15:26,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-20 21:15:26,382 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-07-20 21:15:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:26,390 INFO L225 Difference]: With dead ends: 30 [2018-07-20 21:15:26,390 INFO L226 Difference]: Without dead ends: 13 [2018-07-20 21:15:26,393 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 21:15:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-20 21:15:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-20 21:15:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-20 21:15:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-20 21:15:26,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-07-20 21:15:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:26,434 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-20 21:15:26,435 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-20 21:15:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-20 21:15:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-20 21:15:26,435 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:26,436 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:26,436 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1861068280, now seen corresponding path program 1 times [2018-07-20 21:15:26,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:26,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:26,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:26,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:26,438 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:26,514 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 21:15:26,515 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-20 21:15:26,515 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-20 21:15:26,515 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:15:26,516 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-20 21:15:26,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-20 21:15:26,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-20 21:15:26,519 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-07-20 21:15:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:26,604 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-20 21:15:26,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-20 21:15:26,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-07-20 21:15:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:26,606 INFO L225 Difference]: With dead ends: 21 [2018-07-20 21:15:26,606 INFO L226 Difference]: Without dead ends: 16 [2018-07-20 21:15:26,607 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 21:15:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-20 21:15:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-07-20 21:15:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-20 21:15:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-20 21:15:26,611 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-07-20 21:15:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:26,611 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-20 21:15:26,611 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-20 21:15:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-20 21:15:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-20 21:15:26,612 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:26,612 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:26,612 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:26,613 INFO L82 PathProgramCache]: Analyzing trace with hash 996352094, now seen corresponding path program 1 times [2018-07-20 21:15:26,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:26,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:26,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:26,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:26,614 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:26,772 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 21:15:26,773 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:26,773 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:26,774 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-07-20 21:15:26,776 INFO L201 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [15], [21], [24], [26], [32], [33], [34], [36] [2018-07-20 21:15:26,842 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-07-20 21:15:26,842 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-07-20 21:15:27,137 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-07-20 21:15:27,139 INFO L272 AbstractInterpreter]: Visited 13 different actions 61 times. Merged at 4 different actions 30 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-07-20 21:15:27,173 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-07-20 21:15:27,173 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:27,173 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 21:15:27,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:27,183 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:15:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:27,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:27,230 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 21:15:27,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:27,291 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 21:15:27,317 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:27,317 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 21:15:27,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:27,333 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:15:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:27,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:27,361 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 21:15:27,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:27,377 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 21:15:27,380 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:27,380 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-07-20 21:15:27,380 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:27,381 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-20 21:15:27,381 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-20 21:15:27,381 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-20 21:15:27,382 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-07-20 21:15:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:27,422 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-20 21:15:27,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-20 21:15:27,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-07-20 21:15:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:27,424 INFO L225 Difference]: With dead ends: 24 [2018-07-20 21:15:27,424 INFO L226 Difference]: Without dead ends: 19 [2018-07-20 21:15:27,424 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-20 21:15:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-20 21:15:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-07-20 21:15:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-20 21:15:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-20 21:15:27,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-07-20 21:15:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:27,433 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-20 21:15:27,433 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-20 21:15:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-20 21:15:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-20 21:15:27,434 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:27,434 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:27,434 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1450296376, now seen corresponding path program 2 times [2018-07-20 21:15:27,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:27,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:27,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:27,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:27,437 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:27,523 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:27,523 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:27,523 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:15:27,523 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:15:27,523 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:27,524 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:15:27,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:15:27,532 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:15:27,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:15:27,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:27,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:27,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:27,858 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:27,858 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 21:15:27,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:15:27,873 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:15:27,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:15:27,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:27,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:27,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:27,917 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:27,917 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-07-20 21:15:27,917 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:27,918 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-20 21:15:27,918 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-20 21:15:27,918 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-20 21:15:27,918 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-07-20 21:15:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:27,956 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-20 21:15:27,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-20 21:15:27,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-07-20 21:15:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:27,957 INFO L225 Difference]: With dead ends: 27 [2018-07-20 21:15:27,957 INFO L226 Difference]: Without dead ends: 22 [2018-07-20 21:15:27,958 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-20 21:15:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-20 21:15:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-07-20 21:15:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-20 21:15:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-20 21:15:27,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-07-20 21:15:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:27,964 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-20 21:15:27,964 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-20 21:15:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-20 21:15:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-20 21:15:27,965 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:27,965 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:27,965 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 52386334, now seen corresponding path program 3 times [2018-07-20 21:15:27,966 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:27,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:27,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:15:27,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:27,967 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,056 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:28,056 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:28,056 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:15:28,056 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:15:28,056 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:28,057 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:15:28,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:15:28,063 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:15:28,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-20 21:15:28,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:28,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,316 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:28,316 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 21:15:28,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-20 21:15:28,330 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-20 21:15:28,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-20 21:15:28,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:28,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,363 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:28,376 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-07-20 21:15:28,376 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:28,377 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-20 21:15:28,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-20 21:15:28,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:28,377 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2018-07-20 21:15:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:28,436 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-20 21:15:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-20 21:15:28,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-07-20 21:15:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:28,438 INFO L225 Difference]: With dead ends: 30 [2018-07-20 21:15:28,438 INFO L226 Difference]: Without dead ends: 25 [2018-07-20 21:15:28,439 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-20 21:15:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-07-20 21:15:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-20 21:15:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-20 21:15:28,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2018-07-20 21:15:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:28,443 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-20 21:15:28,443 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-20 21:15:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-20 21:15:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-20 21:15:28,444 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:28,444 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:28,444 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1082772872, now seen corresponding path program 4 times [2018-07-20 21:15:28,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:28,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:28,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:15:28,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:28,446 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,515 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:28,516 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:28,516 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:15:28,516 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:15:28,516 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:28,516 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 21:15:28,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:15:28,523 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-20 21:15:28,532 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:15:28,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:28,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,550 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,931 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:28,931 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 21:15:28,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-20 21:15:28,959 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-20 21:15:28,973 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-20 21:15:28,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:28,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:28,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,080 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:29,080 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 10 [2018-07-20 21:15:29,081 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:29,081 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-20 21:15:29,081 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-20 21:15:29,082 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:29,082 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2018-07-20 21:15:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:29,113 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-20 21:15:29,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-20 21:15:29,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-07-20 21:15:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:29,114 INFO L225 Difference]: With dead ends: 33 [2018-07-20 21:15:29,115 INFO L226 Difference]: Without dead ends: 28 [2018-07-20 21:15:29,115 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-20 21:15:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-07-20 21:15:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-20 21:15:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-20 21:15:29,119 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2018-07-20 21:15:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:29,120 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-20 21:15:29,120 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-20 21:15:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-20 21:15:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-20 21:15:29,121 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:29,121 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:29,121 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash -38190114, now seen corresponding path program 5 times [2018-07-20 21:15:29,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:29,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:29,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:15:29,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:29,123 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,184 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:29,184 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:29,184 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:15:29,185 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:15:29,185 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:29,185 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-20 21:15:29,203 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-20 21:15:29,203 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:15:29,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-20 21:15:29,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:29,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,335 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:29,336 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:15:29,350 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-20 21:15:29,350 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:15:29,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-20 21:15:29,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:29,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,393 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,434 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:29,434 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 10 [2018-07-20 21:15:29,434 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:29,434 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-20 21:15:29,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-20 21:15:29,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:29,435 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-07-20 21:15:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:29,477 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-20 21:15:29,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-20 21:15:29,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-07-20 21:15:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:29,479 INFO L225 Difference]: With dead ends: 36 [2018-07-20 21:15:29,479 INFO L226 Difference]: Without dead ends: 31 [2018-07-20 21:15:29,479 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-20 21:15:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-07-20 21:15:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-20 21:15:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-20 21:15:29,484 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2018-07-20 21:15:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:29,485 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-20 21:15:29,485 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-20 21:15:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-20 21:15:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-20 21:15:29,486 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:29,486 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:29,486 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2088693944, now seen corresponding path program 6 times [2018-07-20 21:15:29,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:29,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:29,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:15:29,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:29,488 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,569 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:29,569 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:29,570 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:15:29,570 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:15:29,570 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:29,570 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:15:29,576 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-20 21:15:29,577 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-20 21:15:29,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-20 21:15:29,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:29,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,721 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:29,722 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:15:29,735 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-20 21:15:29,735 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-07-20 21:15:29,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-07-20 21:15:29,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:29,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:29,895 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:29,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 10 [2018-07-20 21:15:29,895 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:29,895 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-20 21:15:29,896 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-20 21:15:29,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:29,896 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 9 states. [2018-07-20 21:15:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:29,944 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-20 21:15:29,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-20 21:15:29,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2018-07-20 21:15:29,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:29,946 INFO L225 Difference]: With dead ends: 39 [2018-07-20 21:15:29,946 INFO L226 Difference]: Without dead ends: 34 [2018-07-20 21:15:29,946 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:29,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-20 21:15:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-07-20 21:15:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-20 21:15:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-20 21:15:29,951 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2018-07-20 21:15:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:29,952 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-20 21:15:29,952 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-20 21:15:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-20 21:15:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-20 21:15:29,953 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:29,953 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:29,953 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash 439147934, now seen corresponding path program 7 times [2018-07-20 21:15:29,953 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:29,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:29,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:15:29,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:29,955 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:30,025 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:30,025 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:30,025 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:15:30,026 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:15:30,026 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:30,026 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:15:30,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:30,032 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:15:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:30,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:30,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:30,155 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:30,155 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:15:30,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:30,169 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-20 21:15:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:30,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:30,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:30,413 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:30,413 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 10 [2018-07-20 21:15:30,413 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:30,414 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-20 21:15:30,414 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-20 21:15:30,414 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:30,414 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 10 states. [2018-07-20 21:15:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:30,451 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-20 21:15:30,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-20 21:15:30,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2018-07-20 21:15:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:30,453 INFO L225 Difference]: With dead ends: 41 [2018-07-20 21:15:30,453 INFO L226 Difference]: Without dead ends: 36 [2018-07-20 21:15:30,454 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-20 21:15:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-20 21:15:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-20 21:15:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-20 21:15:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-20 21:15:30,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2018-07-20 21:15:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:30,458 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-20 21:15:30,458 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-20 21:15:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-20 21:15:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-20 21:15:30,459 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:30,460 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:30,460 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1829764856, now seen corresponding path program 8 times [2018-07-20 21:15:30,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:30,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:30,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-20 21:15:30,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:30,461 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:30,679 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:30,679 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-07-20 21:15:30,679 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-07-20 21:15:30,679 INFO L419 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-07-20 21:15:30,679 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:30,679 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-07-20 21:15:30,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:15:30,695 INFO L282 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-20 21:15:30,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:15:30,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:30,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:30,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:31,055 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-20 21:15:31,055 INFO L189 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-20 21:15:31,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-20 21:15:31,069 INFO L282 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-20 21:15:31,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-20 21:15:31,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-20 21:15:31,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-20 21:15:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:31,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-20 21:15:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:31,184 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-20 21:15:31,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 24 [2018-07-20 21:15:31,184 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-20 21:15:31,185 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-20 21:15:31,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-20 21:15:31,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2018-07-20 21:15:31,185 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2018-07-20 21:15:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:31,399 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-20 21:15:31,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-20 21:15:31,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-07-20 21:15:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:31,435 INFO L225 Difference]: With dead ends: 44 [2018-07-20 21:15:31,435 INFO L226 Difference]: Without dead ends: 39 [2018-07-20 21:15:31,435 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2018-07-20 21:15:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-20 21:15:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-20 21:15:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-20 21:15:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-20 21:15:31,441 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2018-07-20 21:15:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:31,441 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-20 21:15:31,441 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-20 21:15:31,441 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-20 21:15:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-20 21:15:31,442 INFO L350 BasicCegarLoop]: Found error trace [2018-07-20 21:15:31,442 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-20 21:15:31,443 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-20 21:15:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash 443950942, now seen corresponding path program 9 times [2018-07-20 21:15:31,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-07-20 21:15:31,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:31,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-20 21:15:31,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-20 21:15:31,444 INFO L282 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-20 21:15:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-20 21:15:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-20 21:15:31,591 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-20 21:15:31,591 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-07-20 21:15:31,591 INFO L254 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-20 21:15:31,591 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-20 21:15:31,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-20 21:15:31,592 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-20 21:15:31,592 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-07-20 21:15:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-20 21:15:31,630 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-20 21:15:31,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-20 21:15:31,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-07-20 21:15:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-20 21:15:31,631 INFO L225 Difference]: With dead ends: 39 [2018-07-20 21:15:31,631 INFO L226 Difference]: Without dead ends: 0 [2018-07-20 21:15:31,631 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-20 21:15:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-20 21:15:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-20 21:15:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-20 21:15:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-20 21:15:31,632 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2018-07-20 21:15:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-20 21:15:31,632 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-20 21:15:31,633 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-20 21:15:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-20 21:15:31,633 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-20 21:15:31,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-20 21:15:31,753 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-07-20 21:15:31,753 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-07-20 21:15:31,753 INFO L424 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-07-20 21:15:31,753 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-07-20 21:15:31,753 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-07-20 21:15:31,753 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-07-20 21:15:31,754 INFO L417 ceAbstractionStarter]: At program point L13'''(lines 13 15) the Hoare annotation is: (or (and (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6) (<= main_~sn~0 10)) (and (<= 1 main_~i~0) (<= main_~i~0 1) (<= main_~sn~0 0) (<= 0 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 7 main_~i~0) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= main_~i~0 7)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 4 main_~i~0) (<= main_~i~0 4)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 3) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= 4 main_~sn~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0))) [2018-07-20 21:15:31,754 INFO L421 ceAbstractionStarter]: For program point L13''(lines 13 15) no Hoare annotation was computed. [2018-07-20 21:15:31,754 INFO L421 ceAbstractionStarter]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2018-07-20 21:15:31,754 INFO L421 ceAbstractionStarter]: For program point L13(lines 13 15) no Hoare annotation was computed. [2018-07-20 21:15:31,754 INFO L421 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-07-20 21:15:31,754 INFO L424 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-07-20 21:15:31,755 INFO L417 ceAbstractionStarter]: At program point L13''''(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2018-07-20 21:15:31,755 INFO L424 ceAbstractionStarter]: At program point __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-07-20 21:15:31,755 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-07-20 21:15:31,755 INFO L421 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-07-20 21:15:31,755 INFO L421 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-07-20 21:15:31,755 INFO L421 ceAbstractionStarter]: For program point __U_MULTI_f_storage_ultimate_trunk_examples_svcomp_loops_sum___true_unreach_call_true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-07-20 21:15:31,755 INFO L421 ceAbstractionStarter]: For program point L4''(lines 3 8) no Hoare annotation was computed. [2018-07-20 21:15:31,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:15:31 BoogieIcfgContainer [2018-07-20 21:15:31,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-20 21:15:31,769 INFO L168 Benchmark]: Toolchain (without parser) took 6269.55 ms. Allocated memory was 306.2 MB in the beginning and 499.1 MB in the end (delta: 192.9 MB). Free memory was 252.7 MB in the beginning and 316.3 MB in the end (delta: -63.6 MB). Peak memory consumption was 129.3 MB. Max. memory is 5.3 GB. [2018-07-20 21:15:31,770 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 306.2 MB. Free memory is still 271.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-07-20 21:15:31,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.06 ms. Allocated memory is still 306.2 MB. Free memory was 251.7 MB in the beginning and 242.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. [2018-07-20 21:15:31,771 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.02 ms. Allocated memory is still 306.2 MB. Free memory was 242.6 MB in the beginning and 241.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-07-20 21:15:31,772 INFO L168 Benchmark]: Boogie Preprocessor took 20.74 ms. Allocated memory is still 306.2 MB. Free memory was 241.6 MB in the beginning and 240.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-07-20 21:15:31,773 INFO L168 Benchmark]: RCFGBuilder took 307.23 ms. Allocated memory was 306.2 MB in the beginning and 468.7 MB in the end (delta: 162.5 MB). Free memory was 240.6 MB in the beginning and 440.7 MB in the end (delta: -200.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 5.3 GB. [2018-07-20 21:15:31,773 INFO L168 Benchmark]: TraceAbstraction took 5624.96 ms. Allocated memory was 468.7 MB in the beginning and 499.1 MB in the end (delta: 30.4 MB). Free memory was 439.4 MB in the beginning and 316.3 MB in the end (delta: 123.1 MB). Peak memory consumption was 153.5 MB. Max. memory is 5.3 GB. [2018-07-20 21:15:31,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 306.2 MB. Free memory is still 271.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 280.06 ms. Allocated memory is still 306.2 MB. Free memory was 251.7 MB in the beginning and 242.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. * Boogie Procedure Inliner took 21.02 ms. Allocated memory is still 306.2 MB. Free memory was 242.6 MB in the beginning and 241.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * Boogie Preprocessor took 20.74 ms. Allocated memory is still 306.2 MB. Free memory was 241.6 MB in the beginning and 240.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 307.23 ms. Allocated memory was 306.2 MB in the beginning and 468.7 MB in the end (delta: 162.5 MB). Free memory was 240.6 MB in the beginning and 440.7 MB in the end (delta: -200.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 5624.96 ms. Allocated memory was 468.7 MB in the beginning and 499.1 MB in the end (delta: 30.4 MB). Free memory was 439.4 MB in the beginning and 316.3 MB in the end (delta: 123.1 MB). Peak memory consumption was 153.5 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((10 <= sn && 6 <= i) && i <= 6) && sn <= 10) || (((1 <= i && i <= 1) && sn <= 0) && 0 <= sn)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((7 <= i && 12 <= sn) && sn <= 12) && i <= 7)) || (((6 <= sn && sn <= 6) && 4 <= i) && i <= 4)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 3 && sn <= 4) && 3 <= i) && 4 <= sn)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 5.5s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 147 SDtfs, 37 SDslu, 594 SDs, 0 SdLazy, 277 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 847 GetRequests, 722 SyntacticMatches, 42 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 647 NumberOfCodeBlocks, 645 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 996 ConstructedInterpolants, 0 QuantifiedInterpolants, 83058 SizeOfPredicates, 16 NumberOfNonLiveVariables, 824 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 43 InterpolantComputations, 3 PerfectInterpolantSequences, 126/1746 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum04_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Taipan_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-20_21-15-31-791.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sum04_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Taipan_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-20_21-15-31-791.csv Received shutdown request...