java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:55:34,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:55:34,456 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:55:34,471 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:55:34,471 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:55:34,472 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:55:34,474 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:55:34,476 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:55:34,478 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:55:34,479 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:55:34,481 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:55:34,481 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:55:34,483 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:55:34,484 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:55:34,487 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:55:34,495 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:55:34,496 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:55:34,497 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:55:34,501 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:55:34,505 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:55:34,506 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:55:34,507 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:55:34,509 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:55:34,519 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-22 15:55:34,545 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:55:34,545 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:55:34,546 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:55:34,546 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:55:34,546 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:55:34,546 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:55:34,547 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:55:34,547 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:55:34,547 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 15:55:34,547 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:55:34,547 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:55:34,548 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:55:34,548 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:55:34,548 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:55:34,549 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:55:34,549 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:55:34,549 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:55:34,549 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:55:34,549 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:55:34,550 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:55:34,550 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:55:34,550 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:55:34,550 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:55:34,550 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:55:34,550 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:55:34,551 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:55:34,551 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:55:34,551 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:55:34,551 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:55:34,551 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:55:34,552 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:55:34,552 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:55:34,552 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:55:34,552 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 15:55:34,604 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:55:34,622 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:55:34,627 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:55:34,628 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:55:34,629 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:55:34,629 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-22 15:55:34,710 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c83d81ab6/f2d0aa56e0af410f81d088c285e544f7/FLAGda4383c6c [2018-10-22 15:55:35,124 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:55:35,125 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-22 15:55:35,132 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c83d81ab6/f2d0aa56e0af410f81d088c285e544f7/FLAGda4383c6c [2018-10-22 15:55:35,147 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c83d81ab6/f2d0aa56e0af410f81d088c285e544f7 [2018-10-22 15:55:35,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:55:35,159 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:55:35,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:35,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:55:35,164 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:55:35,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c443bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35, skipping insertion in model container [2018-10-22 15:55:35,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:55:35,200 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:55:35,402 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:35,408 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:55:35,429 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:55:35,446 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:55:35,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35 WrapperNode [2018-10-22 15:55:35,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:55:35,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:35,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:55:35,448 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:55:35,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:55:35,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:55:35,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:55:35,471 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:55:35,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... [2018-10-22 15:55:35,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:55:35,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:55:35,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:55:35,492 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:55:35,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:35,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:55:35,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:55:35,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:55:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:55:35,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:55:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:55:35,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:55:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:55:35,839 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:55:35,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:35 BoogieIcfgContainer [2018-10-22 15:55:35,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:55:35,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:55:35,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:55:35,845 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:55:35,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:55:35" (1/3) ... [2018-10-22 15:55:35,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dba0d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:35, skipping insertion in model container [2018-10-22 15:55:35,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:55:35" (2/3) ... [2018-10-22 15:55:35,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dba0d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:55:35, skipping insertion in model container [2018-10-22 15:55:35,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:55:35" (3/3) ... [2018-10-22 15:55:35,849 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-22 15:55:35,859 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:55:35,867 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:55:35,899 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:55:35,980 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:55:35,981 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:55:35,981 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:55:35,981 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:55:35,982 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:55:35,985 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:55:35,985 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:55:35,985 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:55:35,985 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:55:36,013 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-22 15:55:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:55:36,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:36,029 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:36,031 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:36,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-10-22 15:55:36,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:36,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:36,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,083 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:36,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:36,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:55:36,148 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:36,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:55:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:55:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:55:36,168 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-22 15:55:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:36,189 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-22 15:55:36,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:55:36,191 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 15:55:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:36,200 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:55:36,200 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:55:36,204 INFO L605 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 [2018-10-22 15:55:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:55:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:55:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:55:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-22 15:55:36,243 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-22 15:55:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:36,244 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-22 15:55:36,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:55:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-22 15:55:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:55:36,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:36,245 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:36,246 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:36,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-10-22 15:55:36,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:36,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:36,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,252 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:36,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:36,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:55:36,551 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:36,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:55:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:55:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:36,556 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-10-22 15:55:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:36,645 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-22 15:55:36,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:55:36,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 15:55:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:36,647 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:55:36,647 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:55:36,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:55:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:55:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:55:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:55:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-22 15:55:36,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-10-22 15:55:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:36,655 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-22 15:55:36,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:55:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-22 15:55:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:55:36,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:36,656 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:36,656 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:36,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:36,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-10-22 15:55:36,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:36,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:36,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,659 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:36,705 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:55:36,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:55:36,705 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:55:36,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:55:36,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:55:36,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:55:36,707 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2018-10-22 15:55:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:36,764 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-22 15:55:36,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:55:36,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-10-22 15:55:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:36,767 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:55:36,767 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:55:36,769 INFO L605 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 [2018-10-22 15:55:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:55:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-22 15:55:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:55:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-22 15:55:36,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-10-22 15:55:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:36,775 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-22 15:55:36,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:55:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-22 15:55:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:55:36,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:36,776 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:36,777 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:36,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1833562532, now seen corresponding path program 1 times [2018-10-22 15:55:36,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:36,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:36,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:36,781 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:37,125 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-10-22 15:55:37,311 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-10-22 15:55:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:37,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:37,432 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:37,433 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-22 15:55:37,436 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-22 15:55:37,482 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:55:37,483 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:55:37,593 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 15:55:38,001 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:55:38,003 INFO L272 AbstractInterpreter]: Visited 14 different actions 148 times. Merged at 5 different actions 75 times. Widened at 1 different actions 11 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-22 15:55:38,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:38,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:55:38,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:38,049 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:38,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:38,067 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:38,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:38,389 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:38,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:38,787 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:38,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:38,803 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:38,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:38,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:38,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:38,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 18 [2018-10-22 15:55:38,959 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:38,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:55:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:55:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:55:38,965 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-10-22 15:55:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:39,618 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-22 15:55:39,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:55:39,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-10-22 15:55:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:39,620 INFO L225 Difference]: With dead ends: 30 [2018-10-22 15:55:39,620 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:55:39,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:55:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:55:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 15:55:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 15:55:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-22 15:55:39,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-10-22 15:55:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:39,629 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-22 15:55:39,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:55:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-22 15:55:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:55:39,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:39,631 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:39,631 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:39,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1892022867, now seen corresponding path program 1 times [2018-10-22 15:55:39,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:39,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:39,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:39,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:39,633 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:39,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:39,693 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:39,693 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-22 15:55:39,694 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-10-22 15:55:39,696 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:55:39,696 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:55:39,700 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 15:55:40,018 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:55:40,019 INFO L272 AbstractInterpreter]: Visited 15 different actions 165 times. Merged at 6 different actions 76 times. Widened at 1 different actions 10 times. Found 14 fixpoints after 2 different actions. Largest state had 5 variables. [2018-10-22 15:55:40,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:40,057 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:55:40,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,057 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:40,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:40,071 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:40,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,180 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:40,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:40,196 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:55:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:40,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,221 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:40,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 5 [2018-10-22 15:55:40,254 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:40,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:55:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:55:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:40,255 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-10-22 15:55:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:40,310 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-22 15:55:40,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:55:40,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-10-22 15:55:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:40,312 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:55:40,313 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:55:40,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:55:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 15:55:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 15:55:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-22 15:55:40,318 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-10-22 15:55:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:40,319 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-22 15:55:40,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:55:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-22 15:55:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:55:40,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:40,320 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:40,320 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:40,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1658992628, now seen corresponding path program 2 times [2018-10-22 15:55:40,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:40,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:40,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:55:40,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:40,323 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,388 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:40,388 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:55:40,388 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:55:40,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,388 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:40,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:40,397 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:40,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:40,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:40,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,490 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:40,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:40,511 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:40,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:40,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:40,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:40,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:40,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 5 [2018-10-22 15:55:40,643 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:40,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:55:40,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:55:40,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:40,644 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-10-22 15:55:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:40,706 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-22 15:55:40,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:55:40,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-10-22 15:55:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:40,708 INFO L225 Difference]: With dead ends: 35 [2018-10-22 15:55:40,709 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:55:40,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:55:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:55:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-22 15:55:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:55:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 15:55:40,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-10-22 15:55:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:40,716 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 15:55:40,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:55:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 15:55:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:55:40,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:40,717 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:40,717 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:40,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:40,718 INFO L82 PathProgramCache]: Analyzing trace with hash 849646002, now seen corresponding path program 2 times [2018-10-22 15:55:40,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:40,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:40,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:55:40,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:40,719 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:55:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-22 15:55:40,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,992 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:55:40,992 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:55:40,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:55:40,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:40,993 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:41,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:41,006 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:41,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:41,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:41,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:41,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:41,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:55:41,741 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:55:41,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:55:41,757 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:55:41,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:55:41,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:55:41,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:55:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:41,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:55:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:55:41,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:55:41,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12, 12, 12] total 27 [2018-10-22 15:55:41,887 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:55:41,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:55:41,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:55:41,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:55:41,890 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-10-22 15:55:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:55:42,458 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-10-22 15:55:42,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:55:42,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-10-22 15:55:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:55:42,460 INFO L225 Difference]: With dead ends: 38 [2018-10-22 15:55:42,460 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 15:55:42,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:55:42,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 15:55:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-10-22 15:55:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:55:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-22 15:55:42,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2018-10-22 15:55:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:55:42,469 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-22 15:55:42,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:55:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-22 15:55:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:55:42,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:55:42,470 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:55:42,471 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:55:42,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:55:42,471 INFO L82 PathProgramCache]: Analyzing trace with hash -418779461, now seen corresponding path program 3 times [2018-10-22 15:55:42,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:55:42,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:42,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:55:42,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:55:42,472 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:55:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:55:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 15:55:42,511 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 15:55:42,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:55:42 BoogieIcfgContainer [2018-10-22 15:55:42,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:55:42,540 INFO L168 Benchmark]: Toolchain (without parser) took 7382.12 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -345.3 MB). Peak memory consumption was 389.2 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:42,541 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:55:42,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:42,543 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:55:42,543 INFO L168 Benchmark]: Boogie Preprocessor took 21.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:55:42,544 INFO L168 Benchmark]: RCFGBuilder took 348.45 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:42,545 INFO L168 Benchmark]: TraceAbstraction took 6697.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 421.4 MB). Peak memory consumption was 421.4 MB. Max. memory is 7.1 GB. [2018-10-22 15:55:42,549 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 23.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 348.45 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6697.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 421.4 MB). Peak memory consumption was 421.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=2, n=4] [L15] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L13] i++ VAL [i=2, n=2, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=6, n=4] [L15] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L13] i++ VAL [i=4, n=4, n=6] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=4, n=8] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=4, n=-10] [L13] i++ VAL [i=5, n=-10, n=4] [L13] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 6.5s OverallTime, 8 OverallIterations, 5 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 21 SDslu, 227 SDs, 0 SdLazy, 245 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 288 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.9s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 303 NumberOfCodeBlocks, 303 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 413 ConstructedInterpolants, 24 QuantifiedInterpolants, 40093 SizeOfPredicates, 20 NumberOfNonLiveVariables, 354 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 75/232 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...