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/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:45:08,877 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:45:08,882 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:45:08,898 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:45:08,898 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:45:08,900 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:45:08,901 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:45:08,903 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:45:08,904 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:45:08,905 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:45:08,906 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:45:08,906 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:45:08,907 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:45:08,909 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:45:08,910 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:45:08,911 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:45:08,911 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:45:08,913 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:45:08,915 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:45:08,917 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:45:08,918 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:45:08,919 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:45:08,922 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:45:08,942 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:45:08,971 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:45:08,971 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:45:08,972 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:45:08,972 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:45:08,972 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:45:08,973 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:45:08,975 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:45:08,975 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:45:08,975 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:45:08,976 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:45:08,976 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:45:08,976 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:45:08,976 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:45:08,977 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:45:08,977 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:45:08,977 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:45:08,977 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:45:08,977 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:45:08,978 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:45:08,978 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:45:08,978 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:45:08,978 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:45:08,978 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:45:08,979 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:45:08,980 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:45:08,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:45:08,980 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:45:08,980 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:45:09,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:45:09,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:45:09,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:45:09,054 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:45:09,054 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:45:09,055 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i [2018-10-24 11:45:09,117 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/88323c7ea/94585272b9114072a97aaee953d2babe/FLAG0afc4c45a [2018-10-24 11:45:09,603 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:45:09,604 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i [2018-10-24 11:45:09,609 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/88323c7ea/94585272b9114072a97aaee953d2babe/FLAG0afc4c45a [2018-10-24 11:45:09,623 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/88323c7ea/94585272b9114072a97aaee953d2babe [2018-10-24 11:45:09,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:45:09,634 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:45:09,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:45:09,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:45:09,639 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:45:09,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c168258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09, skipping insertion in model container [2018-10-24 11:45:09,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:45:09,677 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:45:09,868 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:45:09,872 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:45:09,891 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:45:09,907 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:45:09,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09 WrapperNode [2018-10-24 11:45:09,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:45:09,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:45:09,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:45:09,909 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:45:09,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:45:09,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:45:09,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:45:09,947 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:45:09,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (1/1) ... [2018-10-24 11:45:09,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:45:09,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:45:09,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:45:09,969 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:45:09,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (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 11:45:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:45:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:45:10,344 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:45:10,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:10 BoogieIcfgContainer [2018-10-24 11:45:10,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:45:10,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:45:10,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:45:10,350 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:45:10,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:45:09" (1/3) ... [2018-10-24 11:45:10,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32135968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:10, skipping insertion in model container [2018-10-24 11:45:10,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:09" (2/3) ... [2018-10-24 11:45:10,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32135968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:10, skipping insertion in model container [2018-10-24 11:45:10,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:10" (3/3) ... [2018-10-24 11:45:10,354 INFO L112 eAbstractionObserver]: Analyzing ICFG sum03_false-unreach-call_true-termination.i [2018-10-24 11:45:10,364 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:45:10,372 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:45:10,387 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:45:10,420 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:45:10,421 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:45:10,421 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:45:10,421 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:45:10,422 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:45:10,422 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:45:10,422 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:45:10,422 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:45:10,422 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:45:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-24 11:45:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-24 11:45:10,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:10,446 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:10,450 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:10,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 150935469, now seen corresponding path program 1 times [2018-10-24 11:45:10,458 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:10,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:10,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:10,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:10,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:10,768 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 11:45:10,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:10,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 11:45:10,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:45:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:45:10,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:45:10,793 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2018-10-24 11:45:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:10,925 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2018-10-24 11:45:10,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:45:10,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-24 11:45:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:10,939 INFO L225 Difference]: With dead ends: 32 [2018-10-24 11:45:10,939 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 11:45:10,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 11:45:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-10-24 11:45:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:45:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-24 11:45:10,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2018-10-24 11:45:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:10,976 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-24 11:45:10,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:45:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-24 11:45:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-24 11:45:10,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:10,977 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:10,978 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:10,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:10,978 INFO L82 PathProgramCache]: Analyzing trace with hash 150875887, now seen corresponding path program 1 times [2018-10-24 11:45:10,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:10,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:10,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:10,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:10,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:11,120 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 11:45:11,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:11,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:45:11,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:45:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:45:11,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:11,125 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-10-24 11:45:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:13,456 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-10-24 11:45:13,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:45:13,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-24 11:45:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:13,459 INFO L225 Difference]: With dead ends: 30 [2018-10-24 11:45:13,459 INFO L226 Difference]: Without dead ends: 28 [2018-10-24 11:45:13,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:45:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-24 11:45:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-10-24 11:45:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-24 11:45:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-10-24 11:45:13,467 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2018-10-24 11:45:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:13,468 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-10-24 11:45:13,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:45:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-10-24 11:45:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 11:45:13,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:13,469 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:13,469 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:13,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -866095302, now seen corresponding path program 1 times [2018-10-24 11:45:13,470 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:13,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:13,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:13,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:13,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 11:45:13,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:13,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:45:13,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:45:13,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:45:13,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:45:13,547 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2018-10-24 11:45:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:13,606 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-10-24 11:45:13,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:45:13,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-10-24 11:45:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:13,608 INFO L225 Difference]: With dead ends: 34 [2018-10-24 11:45:13,608 INFO L226 Difference]: Without dead ends: 20 [2018-10-24 11:45:13,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:45:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-24 11:45:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-10-24 11:45:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-24 11:45:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-24 11:45:13,614 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-24 11:45:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:13,614 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-24 11:45:13,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:45:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-24 11:45:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 11:45:13,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:13,615 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:13,616 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:13,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash -473008710, now seen corresponding path program 2 times [2018-10-24 11:45:13,616 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:13,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:13,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:13,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:13,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:13,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:13,833 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 11:45:13,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:45:13,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:45:13,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:13,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:13,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:13,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-24 11:45:13,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:45:13,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:45:13,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:45:13,941 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2018-10-24 11:45:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:13,976 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-24 11:45:13,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:45:13,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-24 11:45:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:13,977 INFO L225 Difference]: With dead ends: 34 [2018-10-24 11:45:13,977 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 11:45:13,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:45:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 11:45:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-24 11:45:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-24 11:45:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-24 11:45:13,983 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2018-10-24 11:45:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:13,984 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-24 11:45:13,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:45:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-24 11:45:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:45:13,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:13,985 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-24 11:45:13,985 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:13,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1624266247, now seen corresponding path program 3 times [2018-10-24 11:45:13,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:13,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:13,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:13,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:13,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:14,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:14,125 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 11:45:14,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:45:25,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 11:45:25,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:25,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:25,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:25,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-24 11:45:25,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:45:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:45:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:25,894 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2018-10-24 11:45:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:25,979 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-24 11:45:25,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:45:25,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-24 11:45:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:25,980 INFO L225 Difference]: With dead ends: 40 [2018-10-24 11:45:25,981 INFO L226 Difference]: Without dead ends: 32 [2018-10-24 11:45:25,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-24 11:45:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-24 11:45:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-24 11:45:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-24 11:45:25,993 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2018-10-24 11:45:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:25,993 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-24 11:45:25,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:45:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-24 11:45:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-24 11:45:25,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:25,994 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-24 11:45:25,995 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:25,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1238759276, now seen corresponding path program 4 times [2018-10-24 11:45:25,995 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:25,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:25,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:25,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:25,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:26,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:26,254 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 11:45:26,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:45:26,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:45:26,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:26,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:26,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:26,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-24 11:45:26,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 11:45:26,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 11:45:26,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:45:26,395 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2018-10-24 11:45:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:26,585 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-10-24 11:45:26,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:45:26,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-10-24 11:45:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:26,587 INFO L225 Difference]: With dead ends: 46 [2018-10-24 11:45:26,587 INFO L226 Difference]: Without dead ends: 38 [2018-10-24 11:45:26,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:45:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-24 11:45:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-24 11:45:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-24 11:45:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-24 11:45:26,595 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2018-10-24 11:45:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:26,595 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-24 11:45:26,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 11:45:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-24 11:45:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 11:45:26,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:26,597 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-24 11:45:26,597 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:26,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash 482663777, now seen corresponding path program 5 times [2018-10-24 11:45:26,598 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:26,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:26,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:26,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:26,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:26,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:26,885 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:26,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:45:27,079 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-24 11:45:27,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:27,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:27,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:27,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-24 11:45:27,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:45:27,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:45:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:45:27,206 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2018-10-24 11:45:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:27,360 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2018-10-24 11:45:27,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:45:27,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2018-10-24 11:45:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:27,363 INFO L225 Difference]: With dead ends: 52 [2018-10-24 11:45:27,363 INFO L226 Difference]: Without dead ends: 44 [2018-10-24 11:45:27,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:45:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-24 11:45:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-10-24 11:45:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-24 11:45:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-24 11:45:27,370 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2018-10-24 11:45:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:27,371 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-24 11:45:27,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:45:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-24 11:45:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:45:27,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:27,372 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-24 11:45:27,372 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:27,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1387387794, now seen corresponding path program 6 times [2018-10-24 11:45:27,373 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:27,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:27,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:27,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:27,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:45:27,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:27,706 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-10-24 11:45:27,723 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:45:28,073 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-24 11:45:28,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:28,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:29,133 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 27 [2018-10-24 11:46:06,028 WARN L179 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 33 [2018-10-24 11:46:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 61 refuted. 14 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:46:06,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:06,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 19 [2018-10-24 11:46:06,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:46:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:46:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=288, Unknown=12, NotChecked=0, Total=342 [2018-10-24 11:46:06,149 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 19 states. [2018-10-24 11:47:15,356 WARN L179 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2018-10-24 11:47:44,653 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 8 [2018-10-24 11:47:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:47:53,898 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-10-24 11:47:53,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:47:53,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2018-10-24 11:47:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:47:53,900 INFO L225 Difference]: With dead ends: 58 [2018-10-24 11:47:53,900 INFO L226 Difference]: Without dead ends: 50 [2018-10-24 11:47:53,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=82, Invalid=598, Unknown=22, NotChecked=0, Total=702 [2018-10-24 11:47:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-24 11:47:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-10-24 11:47:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-24 11:47:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-24 11:47:53,910 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2018-10-24 11:47:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:47:53,910 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-24 11:47:53,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:47:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-24 11:47:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:47:53,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:47:53,912 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-24 11:47:53,912 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:47:53,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:47:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2100768187, now seen corresponding path program 7 times [2018-10-24 11:47:53,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:47:53,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:47:53,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:53,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:47:53,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:47:54,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:47:54,376 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:47:54,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:47:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:54,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:47:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:47:54,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:47:54,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-24 11:47:54,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:47:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:47:54,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:47:54,457 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 9 states. [2018-10-24 11:47:54,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:47:54,875 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2018-10-24 11:47:54,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:47:54,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-10-24 11:47:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:47:54,878 INFO L225 Difference]: With dead ends: 64 [2018-10-24 11:47:54,878 INFO L226 Difference]: Without dead ends: 56 [2018-10-24 11:47:54,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:47:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-24 11:47:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-10-24 11:47:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-24 11:47:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-24 11:47:54,887 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2018-10-24 11:47:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:47:54,887 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-24 11:47:54,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:47:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-24 11:47:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:47:54,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:47:54,889 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-24 11:47:54,889 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:47:54,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:47:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash -72005304, now seen corresponding path program 8 times [2018-10-24 11:47:54,890 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:47:54,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:47:54,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:54,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:47:54,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:47:55,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:47:55,169 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2018-10-24 11:47:55,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:47:55,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:47:55,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:47:55,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:47:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:47:55,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:47:55,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-24 11:47:55,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:47:55,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:47:55,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:47:55,280 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 10 states. [2018-10-24 11:47:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:47:55,630 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2018-10-24 11:47:55,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:47:55,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2018-10-24 11:47:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:47:55,631 INFO L225 Difference]: With dead ends: 70 [2018-10-24 11:47:55,632 INFO L226 Difference]: Without dead ends: 62 [2018-10-24 11:47:55,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:47:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-24 11:47:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-10-24 11:47:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-24 11:47:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-24 11:47:55,644 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 50 [2018-10-24 11:47:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:47:55,645 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-24 11:47:55,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:47:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-24 11:47:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 11:47:55,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:47:55,647 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-24 11:47:55,647 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:47:55,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:47:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1899903211, now seen corresponding path program 9 times [2018-10-24 11:47:55,648 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:47:55,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:47:55,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:55,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:47:55,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:47:55,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:47:55,890 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:47:55,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:48:11,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-24 11:48:11,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:48:11,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:48:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:11,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:11,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-24 11:48:11,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:48:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:48:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:48:11,688 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 11 states. [2018-10-24 11:48:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:12,261 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-10-24 11:48:12,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:48:12,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-10-24 11:48:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:12,264 INFO L225 Difference]: With dead ends: 76 [2018-10-24 11:48:12,264 INFO L226 Difference]: Without dead ends: 68 [2018-10-24 11:48:12,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:48:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-24 11:48:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-10-24 11:48:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-24 11:48:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-24 11:48:12,273 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 56 [2018-10-24 11:48:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:12,274 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-24 11:48:12,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:48:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-24 11:48:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:48:12,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:12,275 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-24 11:48:12,276 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:12,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1880749858, now seen corresponding path program 10 times [2018-10-24 11:48:12,276 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:12,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:12,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:12,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:12,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:48:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 18 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:12,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:48:12,579 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:48:12,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:48:12,640 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:48:12,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:48:12,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:48:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 18 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:48:12,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:12,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-24 11:48:12,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:48:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:48:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:48:12,728 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 12 states. [2018-10-24 11:48:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:13,109 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2018-10-24 11:48:13,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:48:13,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-10-24 11:48:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:13,112 INFO L225 Difference]: With dead ends: 82 [2018-10-24 11:48:13,112 INFO L226 Difference]: Without dead ends: 74 [2018-10-24 11:48:13,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:48:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-24 11:48:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-10-24 11:48:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-24 11:48:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-24 11:48:13,122 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 62 [2018-10-24 11:48:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:13,122 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-24 11:48:13,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:48:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-24 11:48:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-24 11:48:13,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:13,125 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-24 11:48:13,125 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:13,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:13,126 INFO L82 PathProgramCache]: Analyzing trace with hash -901830289, now seen corresponding path program 11 times [2018-10-24 11:48:13,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:13,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:13,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:13,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:13,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 11:48:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 11:48:13,266 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-24 11:48:13,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:48:13 BoogieIcfgContainer [2018-10-24 11:48:13,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 11:48:13,311 INFO L168 Benchmark]: Toolchain (without parser) took 183677.36 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 873.5 MB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -940.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:48:13,312 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. [2018-10-24 11:48:13,312 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.20 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 11:48:13,314 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.02 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 11:48:13,314 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. [2018-10-24 11:48:13,315 INFO L168 Benchmark]: RCFGBuilder took 376.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-24 11:48:13,317 INFO L168 Benchmark]: TraceAbstraction took 182963.64 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 118.5 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -144.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:48:13,322 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 273.20 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 38.02 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 376.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 182963.64 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 118.5 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -144.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int sn=0; [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L12] unsigned int x=0; [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND TRUE x<10 [L15] sn = sn + (2) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND FALSE, RET !(!(cond)) [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) [L13] COND TRUE 1 [L14] COND FALSE !(x<10) [L17] x++ [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. UNSAFE Result, 182.8s OverallTime, 13 OverallIterations, 11 TraceHistogramMax, 112.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 271 SDtfs, 46 SDslu, 1556 SDs, 0 SdLazy, 1059 SolverSat, 7 SolverUnsat, 26 SolverUnknown, 0 SolverNotchecked, 71.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 338 SyntacticMatches, 19 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 79.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 18 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 28.1s SatisfiabilityAnalysisTime, 41.3s InterpolantComputationTime, 782 NumberOfCodeBlocks, 776 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 693 ConstructedInterpolants, 23 QuantifiedInterpolants, 221868 SizeOfPredicates, 17 NumberOfNonLiveVariables, 743 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 185/1895 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...