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-EXP.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:36:23,968 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:36:23,971 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:36:23,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:36:23,987 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:36:23,988 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:36:23,990 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:36:23,992 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:36:23,993 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:36:23,994 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:36:23,995 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:36:23,996 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:36:23,996 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:36:23,998 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:36:23,999 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:36:24,000 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:36:24,000 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:36:24,002 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:36:24,004 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:36:24,006 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:36:24,008 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:36:24,009 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:36:24,011 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 12:36:24,020 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:36:24,043 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:36:24,043 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:36:24,044 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:36:24,044 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:36:24,044 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:36:24,045 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:36:24,045 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:36:24,046 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:36:24,046 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:36:24,046 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:36:24,046 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:36:24,046 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:36:24,047 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:36:24,047 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:36:24,048 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:36:24,048 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:36:24,048 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:36:24,049 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:36:24,049 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:36:24,049 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:36:24,049 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:36:24,049 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:36:24,050 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:36:24,050 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:36:24,050 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:36:24,050 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:36:24,051 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:36:24,052 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:36:24,052 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:36:24,052 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:36:24,053 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:36:24,053 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:36:24,053 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:36:24,053 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:36:24,053 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:36:24,054 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:36:24,116 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:36:24,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:36:24,134 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:36:24,135 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:36:24,136 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:36:24,137 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b_true-unreach-call_true-termination.c.i [2018-10-24 12:36:24,197 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bf135e3bc/dfb1dc7095f444fc94de914b1eb89f7e/FLAG020899513 [2018-10-24 12:36:24,627 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:36:24,628 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b_true-unreach-call_true-termination.c.i [2018-10-24 12:36:24,634 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bf135e3bc/dfb1dc7095f444fc94de914b1eb89f7e/FLAG020899513 [2018-10-24 12:36:24,653 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bf135e3bc/dfb1dc7095f444fc94de914b1eb89f7e [2018-10-24 12:36:24,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:36:24,666 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:36:24,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:36:24,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:36:24,671 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:36:24,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c237445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24, skipping insertion in model container [2018-10-24 12:36:24,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:36:24,707 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:36:24,880 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:36:24,885 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:36:24,902 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:36:24,916 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:36:24,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24 WrapperNode [2018-10-24 12:36:24,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:36:24,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:36:24,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:36:24,918 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:36:24,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:36:24,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:36:24,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:36:24,937 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:36:24,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (1/1) ... [2018-10-24 12:36:24,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:36:24,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:36:24,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:36:24,959 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:36:24,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (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 [2018-10-24 12:36:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:36:25,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:36:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:36:25,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:36:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:36:25,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:36:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:36:25,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:36:25,322 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:36:25,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:25 BoogieIcfgContainer [2018-10-24 12:36:25,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:36:25,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:36:25,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:36:25,334 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:36:25,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:36:24" (1/3) ... [2018-10-24 12:36:25,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853278d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:25, skipping insertion in model container [2018-10-24 12:36:25,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:24" (2/3) ... [2018-10-24 12:36:25,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853278d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:25, skipping insertion in model container [2018-10-24 12:36:25,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:25" (3/3) ... [2018-10-24 12:36:25,339 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007b_true-unreach-call_true-termination.c.i [2018-10-24 12:36:25,351 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:36:25,360 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:36:25,380 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:36:25,433 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:36:25,433 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:36:25,433 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:36:25,434 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:36:25,434 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:36:25,434 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:36:25,434 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:36:25,434 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:36:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-24 12:36:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 12:36:25,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:36:25,461 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:36:25,463 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:36:25,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash 425736256, now seen corresponding path program 1 times [2018-10-24 12:36:25,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:36:25,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:25,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:25,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:25,525 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:36:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:25,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:36:25,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:36:25,596 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:36:25,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:36:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:36:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:36:25,620 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-24 12:36:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:36:25,643 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2018-10-24 12:36:25,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:36:25,645 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-24 12:36:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:36:25,656 INFO L225 Difference]: With dead ends: 35 [2018-10-24 12:36:25,656 INFO L226 Difference]: Without dead ends: 17 [2018-10-24 12:36:25,663 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 [2018-10-24 12:36:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-24 12:36:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-24 12:36:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-24 12:36:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-24 12:36:25,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2018-10-24 12:36:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:36:25,706 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-24 12:36:25,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:36:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-24 12:36:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 12:36:25,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:36:25,708 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:36:25,708 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:36:25,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash -145623935, now seen corresponding path program 1 times [2018-10-24 12:36:25,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:36:25,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:25,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:25,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:25,711 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:36:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:25,845 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:36:25,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:36:25,846 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:36:25,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:36:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:36:25,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:36:25,849 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2018-10-24 12:36:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:36:25,978 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-10-24 12:36:25,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:36:25,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-24 12:36:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:36:25,980 INFO L225 Difference]: With dead ends: 29 [2018-10-24 12:36:25,980 INFO L226 Difference]: Without dead ends: 27 [2018-10-24 12:36:25,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:36:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-24 12:36:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-24 12:36:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 12:36:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-10-24 12:36:25,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2018-10-24 12:36:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:36:25,989 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-10-24 12:36:25,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:36:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-10-24 12:36:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 12:36:25,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:36:25,991 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:36:25,991 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:36:25,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:25,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1098814237, now seen corresponding path program 1 times [2018-10-24 12:36:25,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:36:25,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:25,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:25,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:25,993 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:36:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:26,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:36:26,188 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:36:26,189 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-24 12:36:26,191 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [29], [32], [34], [37], [39], [40], [41], [42], [44], [45], [46] [2018-10-24 12:36:26,227 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:36:26,227 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:36:26,374 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:36:26,375 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Never found a fixpoint. Largest state had 4 variables. [2018-10-24 12:36:26,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:26,419 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:36:26,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:36:26,419 INFO L194 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 [2018-10-24 12:36:26,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:26,438 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:36:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:26,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:36:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:26,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:36:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:27,079 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:36:27,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 11 [2018-10-24 12:36:27,079 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:36:27,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:36:27,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:36:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-10-24 12:36:27,081 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2018-10-24 12:36:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:36:27,265 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2018-10-24 12:36:27,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 12:36:27,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-24 12:36:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:36:27,268 INFO L225 Difference]: With dead ends: 43 [2018-10-24 12:36:27,268 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 12:36:27,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-24 12:36:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 12:36:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-24 12:36:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-24 12:36:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-10-24 12:36:27,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2018-10-24 12:36:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:36:27,278 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-10-24 12:36:27,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:36:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-10-24 12:36:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 12:36:27,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:36:27,280 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:36:27,280 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:36:27,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1093455445, now seen corresponding path program 1 times [2018-10-24 12:36:27,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:36:27,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:27,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:27,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:27,282 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:36:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:27,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:36:27,445 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:36:27,446 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-24 12:36:27,446 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [17], [21], [29], [32], [34], [40], [41], [42], [44] [2018-10-24 12:36:27,448 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:36:27,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:36:27,548 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:36:27,548 INFO L272 AbstractInterpreter]: Visited 14 different actions 33 times. Merged at 5 different actions 11 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-24 12:36:27,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:27,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:36:27,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:36:27,556 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:36:27,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:27,565 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:36:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:27,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:36:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:27,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:36:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:27,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:36:27,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2018-10-24 12:36:27,766 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:36:27,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:36:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:36:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:36:27,768 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2018-10-24 12:36:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:36:27,912 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-10-24 12:36:27,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:36:27,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-10-24 12:36:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:36:27,914 INFO L225 Difference]: With dead ends: 34 [2018-10-24 12:36:27,914 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 12:36:27,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:36:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 12:36:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2018-10-24 12:36:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:36:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-24 12:36:27,920 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2018-10-24 12:36:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:36:27,921 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-24 12:36:27,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:36:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-24 12:36:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:36:27,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:36:27,922 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:36:27,922 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:36:27,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1642528819, now seen corresponding path program 1 times [2018-10-24 12:36:27,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:36:27,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:27,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:27,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:36:27,924 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:36:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:28,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:36:28,359 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:36:28,359 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-24 12:36:28,360 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [17], [21], [29], [32], [34], [37], [39], [40], [41], [42], [44], [45], [46] [2018-10-24 12:36:28,361 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:36:28,362 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:36:28,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:36:28,433 INFO L272 AbstractInterpreter]: Visited 18 different actions 60 times. Merged at 6 different actions 13 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-24 12:36:28,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:36:28,443 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:36:28,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:36:28,443 INFO L194 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 [2018-10-24 12:36:28,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:36:28,457 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:36:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:36:28,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:36:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:28,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:36:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:36:28,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:36:28,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 9] total 15 [2018-10-24 12:36:28,886 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:36:28,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:36:28,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:36:28,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-10-24 12:36:28,891 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2018-10-24 12:36:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:36:29,010 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-24 12:36:29,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 12:36:29,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-10-24 12:36:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:36:29,011 INFO L225 Difference]: With dead ends: 21 [2018-10-24 12:36:29,012 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:36:29,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:36:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:36:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:36:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:36:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:36:29,014 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-10-24 12:36:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:36:29,014 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:36:29,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:36:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:36:29,015 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:36:29,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:36:29,218 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-24 12:36:29,218 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:36:29,218 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:36:29,218 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-24 12:36:29,218 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:36:29,219 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:36:29,219 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2018-10-24 12:36:29,219 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2018-10-24 12:36:29,219 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-10-24 12:36:29,219 INFO L421 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 0))) (or (and .cse0 (<= main_~x~0 0)) (and (<= 0 main_~m~0) (or .cse0 (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)))) [2018-10-24 12:36:29,219 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-10-24 12:36:29,219 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 19) no Hoare annotation was computed. [2018-10-24 12:36:29,220 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 15 17) no Hoare annotation was computed. [2018-10-24 12:36:29,220 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 23) no Hoare annotation was computed. [2018-10-24 12:36:29,220 INFO L421 ceAbstractionStarter]: At program point L14-3(lines 14 19) the Hoare annotation is: (and (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)) [2018-10-24 12:36:29,220 INFO L421 ceAbstractionStarter]: At program point L14-4(lines 14 19) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0))) (or (and (<= main_~n~0 0) .cse0) (and .cse0 (< main_~m~0 main_~n~0) (<= 0 main_~x~0)))) [2018-10-24 12:36:29,220 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-24 12:36:29,220 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-24 12:36:29,221 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:36:29,221 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-24 12:36:29,221 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-24 12:36:29,221 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-24 12:36:29,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:36:29 BoogieIcfgContainer [2018-10-24 12:36:29,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:36:29,233 INFO L168 Benchmark]: Toolchain (without parser) took 4568.19 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -589.7 MB). Peak memory consumption was 153.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:36:29,235 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-10-24 12:36:29,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.56 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. [2018-10-24 12:36:29,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.32 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. [2018-10-24 12:36:29,237 INFO L168 Benchmark]: Boogie Preprocessor took 21.90 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. [2018-10-24 12:36:29,237 INFO L168 Benchmark]: RCFGBuilder took 364.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -783.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:36:29,239 INFO L168 Benchmark]: TraceAbstraction took 3901.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.2 MB). Peak memory consumption was 183.2 MB. Max. memory is 7.1 GB. [2018-10-24 12:36:29,244 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.56 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 18.32 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 21.90 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 364.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -783.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3901.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.2 MB). Peak memory consumption was 183.2 MB. Max. memory is 7.1 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: 14]: Loop Invariant Derived loop invariant: (0 <= m && (n <= 0 || m < n)) && 0 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 3.8s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 33 SDslu, 176 SDs, 0 SdLazy, 97 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 13 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 18 NumberOfFragments, 59 HoareAnnotationTreeSize, 13 FomulaSimplifications, 33 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 163 ConstructedInterpolants, 0 QuantifiedInterpolants, 7335 SizeOfPredicates, 13 NumberOfNonLiveVariables, 123 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 11/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...