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/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:49:00,493 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:49:00,495 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:49:00,510 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:49:00,510 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:49:00,512 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:49:00,517 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:49:00,519 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:49:00,522 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:49:00,527 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:49:00,528 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:49:00,528 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:49:00,533 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:49:00,534 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:49:00,537 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:49:00,538 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:49:00,539 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:49:00,545 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:49:00,547 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:49:00,550 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:49:00,552 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:49:00,554 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:49:00,557 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:49:00,569 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 [2018-10-22 15:49:00,583 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:49:00,584 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:49:00,584 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:49:00,585 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:49:00,585 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:49:00,585 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:49:00,586 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:49:00,586 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:49:00,586 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:49:00,586 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:49:00,586 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:49:00,587 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:49:00,587 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:49:00,587 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:49:00,587 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:49:00,587 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:49:00,588 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:49:00,588 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:49:00,588 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:49:00,588 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:49:00,588 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:49:00,589 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:49:00,589 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:49:00,589 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:49:00,589 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:49:00,589 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:49:00,589 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:49:00,590 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:49:00,632 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:49:00,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:49:00,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:49:00,649 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:49:00,650 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:49:00,651 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-22 15:49:00,712 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/29133f76c/3b40a653de5a4a77abd063ab905e8c80/FLAG7abf2a5a4 [2018-10-22 15:49:01,146 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:49:01,147 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-22 15:49:01,153 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/29133f76c/3b40a653de5a4a77abd063ab905e8c80/FLAG7abf2a5a4 [2018-10-22 15:49:01,169 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/29133f76c/3b40a653de5a4a77abd063ab905e8c80 [2018-10-22 15:49:01,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:49:01,181 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:49:01,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:49:01,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:49:01,189 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:49:01,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eadafb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01, skipping insertion in model container [2018-10-22 15:49:01,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:49:01,231 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:49:01,439 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:49:01,443 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:49:01,460 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:49:01,475 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:49:01,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01 WrapperNode [2018-10-22 15:49:01,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:49:01,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:49:01,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:49:01,478 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:49:01,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:49:01,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:49:01,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:49:01,507 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:49:01,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... [2018-10-22 15:49:01,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:49:01,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:49:01,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:49:01,527 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:49:01,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:49:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:49:01,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:49:01,904 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:49:01,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:49:01 BoogieIcfgContainer [2018-10-22 15:49:01,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:49:01,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:49:01,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:49:01,909 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:49:01,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:49:01" (1/3) ... [2018-10-22 15:49:01,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb0bdec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:49:01, skipping insertion in model container [2018-10-22 15:49:01,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:01" (2/3) ... [2018-10-22 15:49:01,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb0bdec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:49:01, skipping insertion in model container [2018-10-22 15:49:01,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:49:01" (3/3) ... [2018-10-22 15:49:01,912 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr_true-unreach-call_true-termination.i [2018-10-22 15:49:01,922 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:49:01,929 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:49:01,944 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:49:01,976 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:49:01,977 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:49:01,977 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:49:01,978 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:49:01,978 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:49:01,978 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:49:01,978 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:49:01,978 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:49:01,979 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:49:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-22 15:49:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:49:01,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:02,000 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:02,002 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:02,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1240807568, now seen corresponding path program 1 times [2018-10-22 15:49:02,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:02,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:02,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:02,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:02,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:49:02,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:49:02,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:49:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:49:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:49:02,125 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-22 15:49:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:02,142 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2018-10-22 15:49:02,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:49:02,144 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-22 15:49:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:02,154 INFO L225 Difference]: With dead ends: 32 [2018-10-22 15:49:02,155 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:49:02,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:49:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:49:02,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:49:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:49:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-22 15:49:02,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-10-22 15:49:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:02,194 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-22 15:49:02,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:49:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-22 15:49:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:49:02,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:02,195 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:02,196 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:02,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash 525249980, now seen corresponding path program 1 times [2018-10-22 15:49:02,196 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:02,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:02,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:02,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:02,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:49:02,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:49:02,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:49:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:49:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:49:02,331 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2018-10-22 15:49:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:02,701 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-22 15:49:02,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:49:02,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-22 15:49:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:02,703 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:49:02,704 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:49:02,705 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 [2018-10-22 15:49:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:49:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-22 15:49:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:49:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-22 15:49:02,710 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2018-10-22 15:49:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:02,710 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-22 15:49:02,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:49:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-22 15:49:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:49:02,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:02,712 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:02,712 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:02,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1808282751, now seen corresponding path program 1 times [2018-10-22 15:49:02,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:02,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:02,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:02,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:02,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:02,870 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 [2018-10-22 15:49:02,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:02,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:03,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:03,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-22 15:49:03,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:49:03,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:49:03,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:49:03,094 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2018-10-22 15:49:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:03,532 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-22 15:49:03,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:49:03,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-22 15:49:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:03,536 INFO L225 Difference]: With dead ends: 50 [2018-10-22 15:49:03,536 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:49:03,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:49:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:49:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2018-10-22 15:49:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:49:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-10-22 15:49:03,546 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 16 [2018-10-22 15:49:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:03,547 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-10-22 15:49:03,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:49:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-10-22 15:49:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:49:03,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:03,551 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:03,551 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:03,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 332243324, now seen corresponding path program 2 times [2018-10-22 15:49:03,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:03,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:03,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:03,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:03,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:03,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:03,683 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 [2018-10-22 15:49:03,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:03,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:03,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:03,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:04,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:04,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-22 15:49:04,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:49:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:49:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:49:04,015 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 13 states. [2018-10-22 15:49:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:05,295 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2018-10-22 15:49:05,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:49:05,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-22 15:49:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:05,300 INFO L225 Difference]: With dead ends: 116 [2018-10-22 15:49:05,300 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:49:05,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:49:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:49:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2018-10-22 15:49:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-22 15:49:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2018-10-22 15:49:05,310 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 25 [2018-10-22 15:49:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:05,311 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2018-10-22 15:49:05,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:49:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2018-10-22 15:49:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:49:05,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:05,312 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:05,313 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:05,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash -122567908, now seen corresponding path program 3 times [2018-10-22 15:49:05,313 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:05,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:05,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:05,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:05,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:05,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:05,585 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 [2018-10-22 15:49:05,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:05,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 15:49:05,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:05,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:06,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:06,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-10-22 15:49:06,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:49:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:49:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:49:06,182 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 25 states. [2018-10-22 15:49:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:06,949 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2018-10-22 15:49:06,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:49:06,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2018-10-22 15:49:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:06,953 INFO L225 Difference]: With dead ends: 284 [2018-10-22 15:49:06,953 INFO L226 Difference]: Without dead ends: 258 [2018-10-22 15:49:06,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=458, Invalid=874, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:49:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-22 15:49:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 124. [2018-10-22 15:49:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-22 15:49:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2018-10-22 15:49:06,968 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 43 [2018-10-22 15:49:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:06,969 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2018-10-22 15:49:06,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:49:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2018-10-22 15:49:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:49:06,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:06,972 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:06,972 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:06,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1682403748, now seen corresponding path program 4 times [2018-10-22 15:49:06,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:06,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:06,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:06,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:06,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:07,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:07,667 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 [2018-10-22 15:49:07,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:07,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:07,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:07,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:08,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:08,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2018-10-22 15:49:08,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:49:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:49:08,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:49:08,917 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand 49 states. [2018-10-22 15:49:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:10,943 INFO L93 Difference]: Finished difference Result 782 states and 852 transitions. [2018-10-22 15:49:10,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-22 15:49:10,944 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 79 [2018-10-22 15:49:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:10,949 INFO L225 Difference]: With dead ends: 782 [2018-10-22 15:49:10,949 INFO L226 Difference]: Without dead ends: 732 [2018-10-22 15:49:10,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1778, Invalid=3478, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:49:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2018-10-22 15:49:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 244. [2018-10-22 15:49:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-22 15:49:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 268 transitions. [2018-10-22 15:49:10,983 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 268 transitions. Word has length 79 [2018-10-22 15:49:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:10,983 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 268 transitions. [2018-10-22 15:49:10,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:49:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 268 transitions. [2018-10-22 15:49:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-22 15:49:10,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:10,991 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:10,992 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:10,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:10,992 INFO L82 PathProgramCache]: Analyzing trace with hash -224901924, now seen corresponding path program 5 times [2018-10-22 15:49:10,992 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:10,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:10,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:10,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:10,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:12,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:12,634 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 [2018-10-22 15:49:12,642 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:13,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2018-10-22 15:49:13,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:13,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:16,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:16,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 97 [2018-10-22 15:49:16,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-22 15:49:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-22 15:49:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:49:16,192 INFO L87 Difference]: Start difference. First operand 244 states and 268 transitions. Second operand 97 states. [2018-10-22 15:49:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:22,125 INFO L93 Difference]: Finished difference Result 2426 states and 2568 transitions. [2018-10-22 15:49:22,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-22 15:49:22,126 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 151 [2018-10-22 15:49:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:22,137 INFO L225 Difference]: With dead ends: 2426 [2018-10-22 15:49:22,138 INFO L226 Difference]: Without dead ends: 2328 [2018-10-22 15:49:22,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=7010, Invalid=13870, Unknown=0, NotChecked=0, Total=20880 [2018-10-22 15:49:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2018-10-22 15:49:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 484. [2018-10-22 15:49:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-10-22 15:49:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 532 transitions. [2018-10-22 15:49:22,177 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 532 transitions. Word has length 151 [2018-10-22 15:49:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:22,178 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 532 transitions. [2018-10-22 15:49:22,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-22 15:49:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 532 transitions. [2018-10-22 15:49:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-22 15:49:22,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:22,185 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:22,186 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:22,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:22,186 INFO L82 PathProgramCache]: Analyzing trace with hash -832556580, now seen corresponding path program 6 times [2018-10-22 15:49:22,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:22,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:22,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:22,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:22,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:26,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:26,319 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 [2018-10-22 15:49:26,326 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:26,757 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2018-10-22 15:49:26,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:26,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:37,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:37,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 193 [2018-10-22 15:49:37,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-10-22 15:49:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-10-22 15:49:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18338, Invalid=18718, Unknown=0, NotChecked=0, Total=37056 [2018-10-22 15:49:37,128 INFO L87 Difference]: Start difference. First operand 484 states and 532 transitions. Second operand 193 states. [2018-10-22 15:50:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:14,397 INFO L93 Difference]: Finished difference Result 8306 states and 8592 transitions. [2018-10-22 15:50:14,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2018-10-22 15:50:14,398 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 295 [2018-10-22 15:50:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:14,426 INFO L225 Difference]: With dead ends: 8306 [2018-10-22 15:50:14,426 INFO L226 Difference]: Without dead ends: 8112 [2018-10-22 15:50:14,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4843 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=27842, Invalid=55390, Unknown=0, NotChecked=0, Total=83232 [2018-10-22 15:50:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8112 states. [2018-10-22 15:50:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8112 to 964. [2018-10-22 15:50:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2018-10-22 15:50:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1060 transitions. [2018-10-22 15:50:14,482 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1060 transitions. Word has length 295 [2018-10-22 15:50:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:14,483 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1060 transitions. [2018-10-22 15:50:14,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-10-22 15:50:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1060 transitions. [2018-10-22 15:50:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-22 15:50:14,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:14,498 INFO L375 BasicCegarLoop]: trace histogram [191, 191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:14,498 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:14,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1410468828, now seen corresponding path program 7 times [2018-10-22 15:50:14,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:14,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:14,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:14,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:14,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 54435 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:30,260 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:30,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [193] imperfect sequences [] total 193 [2018-10-22 15:50:30,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-10-22 15:50:30,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-10-22 15:50:30,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-10-22 15:50:30,266 INFO L87 Difference]: Start difference. First operand 964 states and 1060 transitions. Second operand 193 states. [2018-10-22 15:50:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:32,444 INFO L93 Difference]: Finished difference Result 41829 states and 42015 transitions. [2018-10-22 15:50:32,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-10-22 15:50:32,445 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 583 [2018-10-22 15:50:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:32,452 INFO L225 Difference]: With dead ends: 41829 [2018-10-22 15:50:32,452 INFO L226 Difference]: Without dead ends: 1786 [2018-10-22 15:50:32,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-10-22 15:50:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2018-10-22 15:50:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1770. [2018-10-22 15:50:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1770 states. [2018-10-22 15:50:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 1778 transitions. [2018-10-22 15:50:32,512 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 1778 transitions. Word has length 583 [2018-10-22 15:50:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:32,513 INFO L481 AbstractCegarLoop]: Abstraction has 1770 states and 1778 transitions. [2018-10-22 15:50:32,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-10-22 15:50:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 1778 transitions. [2018-10-22 15:50:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-22 15:50:32,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:32,528 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 92, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:32,528 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:32,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -895219466, now seen corresponding path program 1 times [2018-10-22 15:50:32,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:32,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:32,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:32,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,642 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 [2018-10-22 15:50:46,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:47,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 194 [2018-10-22 15:50:47,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-10-22 15:50:47,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-10-22 15:50:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2018-10-22 15:50:47,372 INFO L87 Difference]: Start difference. First operand 1770 states and 1778 transitions. Second operand 194 states. [2018-10-22 15:51:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:02,757 INFO L93 Difference]: Finished difference Result 3304 states and 3411 transitions. [2018-10-22 15:51:02,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-10-22 15:51:02,757 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 583 [2018-10-22 15:51:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:02,768 INFO L225 Difference]: With dead ends: 3304 [2018-10-22 15:51:02,769 INFO L226 Difference]: Without dead ends: 2999 [2018-10-22 15:51:02,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 583 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=18534, Invalid=19296, Unknown=0, NotChecked=0, Total=37830 [2018-10-22 15:51:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2018-10-22 15:51:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 1773. [2018-10-22 15:51:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1773 states. [2018-10-22 15:51:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 1781 transitions. [2018-10-22 15:51:02,804 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 1781 transitions. Word has length 583 [2018-10-22 15:51:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:02,804 INFO L481 AbstractCegarLoop]: Abstraction has 1773 states and 1781 transitions. [2018-10-22 15:51:02,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-10-22 15:51:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 1781 transitions. [2018-10-22 15:51:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-10-22 15:51:02,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:02,811 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 93, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:02,811 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:02,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:02,812 INFO L82 PathProgramCache]: Analyzing trace with hash -582669855, now seen corresponding path program 2 times [2018-10-22 15:51:02,812 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:02,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:02,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:02,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27684 backedges. 0 proven. 27684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:17,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:17,446 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 [2018-10-22 15:51:17,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:17,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:17,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:17,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27684 backedges. 0 proven. 27684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:18,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195] total 195 [2018-10-22 15:51:18,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-10-22 15:51:18,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-10-22 15:51:18,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18723, Invalid=19107, Unknown=0, NotChecked=0, Total=37830 [2018-10-22 15:51:18,431 INFO L87 Difference]: Start difference. First operand 1773 states and 1781 transitions. Second operand 195 states. [2018-10-22 15:51:36,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:36,332 INFO L93 Difference]: Finished difference Result 3028 states and 3135 transitions. [2018-10-22 15:51:36,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-10-22 15:51:36,332 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 586 [2018-10-22 15:51:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:36,341 INFO L225 Difference]: With dead ends: 3028 [2018-10-22 15:51:36,342 INFO L226 Difference]: Without dead ends: 2723 [2018-10-22 15:51:36,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18727, Invalid=19493, Unknown=0, NotChecked=0, Total=38220 [2018-10-22 15:51:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2018-10-22 15:51:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1776. [2018-10-22 15:51:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1776 states. [2018-10-22 15:51:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 1784 transitions. [2018-10-22 15:51:36,373 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 1784 transitions. Word has length 586 [2018-10-22 15:51:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:36,374 INFO L481 AbstractCegarLoop]: Abstraction has 1776 states and 1784 transitions. [2018-10-22 15:51:36,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-10-22 15:51:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 1784 transitions. [2018-10-22 15:51:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2018-10-22 15:51:36,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:36,380 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:36,381 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:36,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash -906306282, now seen corresponding path program 3 times [2018-10-22 15:51:36,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:36,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:36,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:36,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:36,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 27963 backedges. 0 proven. 27963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:51,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:51,477 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 [2018-10-22 15:51:51,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:52,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-22 15:51:52,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:52,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27963 backedges. 0 proven. 27963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:52,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:52,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 196] total 196 [2018-10-22 15:51:52,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-10-22 15:51:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-10-22 15:51:52,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2018-10-22 15:51:52,579 INFO L87 Difference]: Start difference. First operand 1776 states and 1784 transitions. Second operand 196 states. [2018-10-22 15:52:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:05,169 INFO L93 Difference]: Finished difference Result 2749 states and 2856 transitions. [2018-10-22 15:52:05,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-10-22 15:52:05,170 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 589 [2018-10-22 15:52:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:05,181 INFO L225 Difference]: With dead ends: 2749 [2018-10-22 15:52:05,181 INFO L226 Difference]: Without dead ends: 2444 [2018-10-22 15:52:05,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 589 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=18921, Invalid=19691, Unknown=0, NotChecked=0, Total=38612 [2018-10-22 15:52:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2018-10-22 15:52:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1779. [2018-10-22 15:52:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1779 states. [2018-10-22 15:52:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 1787 transitions. [2018-10-22 15:52:05,211 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 1787 transitions. Word has length 589 [2018-10-22 15:52:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:05,211 INFO L481 AbstractCegarLoop]: Abstraction has 1779 states and 1787 transitions. [2018-10-22 15:52:05,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-10-22 15:52:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 1787 transitions. [2018-10-22 15:52:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2018-10-22 15:52:05,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:05,218 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 95, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:05,219 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:05,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash -157523519, now seen corresponding path program 4 times [2018-10-22 15:52:05,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:05,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:05,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:05,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:05,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28245 backedges. 0 proven. 28245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:21,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:21,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:21,868 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:22,091 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:22,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:22,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28245 backedges. 0 proven. 28245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:23,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:23,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197] total 197 [2018-10-22 15:52:23,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-10-22 15:52:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-10-22 15:52:23,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19112, Invalid=19500, Unknown=0, NotChecked=0, Total=38612 [2018-10-22 15:52:23,105 INFO L87 Difference]: Start difference. First operand 1779 states and 1787 transitions. Second operand 197 states. [2018-10-22 15:52:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:42,710 INFO L93 Difference]: Finished difference Result 2467 states and 2574 transitions. [2018-10-22 15:52:42,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-10-22 15:52:42,710 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 592 [2018-10-22 15:52:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:42,718 INFO L225 Difference]: With dead ends: 2467 [2018-10-22 15:52:42,718 INFO L226 Difference]: Without dead ends: 2162 [2018-10-22 15:52:42,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=19116, Invalid=19890, Unknown=0, NotChecked=0, Total=39006 [2018-10-22 15:52:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2018-10-22 15:52:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1782. [2018-10-22 15:52:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2018-10-22 15:52:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 1790 transitions. [2018-10-22 15:52:42,742 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 1790 transitions. Word has length 592 [2018-10-22 15:52:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:42,742 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 1790 transitions. [2018-10-22 15:52:42,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-10-22 15:52:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 1790 transitions. [2018-10-22 15:52:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2018-10-22 15:52:42,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:42,749 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 96, 96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:42,749 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:42,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1230366410, now seen corresponding path program 5 times [2018-10-22 15:52:42,749 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:42,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:42,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:42,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:42,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 28530 backedges. 0 proven. 28530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:58,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:58,462 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:58,470 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:59,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2018-10-22 15:52:59,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:59,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 28530 backedges. 0 proven. 28530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:00,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:00,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198] total 198 [2018-10-22 15:53:00,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-10-22 15:53:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-10-22 15:53:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2018-10-22 15:53:00,631 INFO L87 Difference]: Start difference. First operand 1782 states and 1790 transitions. Second operand 198 states. Received shutdown request... [2018-10-22 15:53:14,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-10-22 15:53:14,640 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:53:14,646 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:53:14,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:53:14 BoogieIcfgContainer [2018-10-22 15:53:14,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:53:14,647 INFO L168 Benchmark]: Toolchain (without parser) took 253467.74 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -981.1 MB). Peak memory consumption was 375.8 MB. Max. memory is 7.1 GB. [2018-10-22 15:53:14,649 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:53:14,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:53:14,651 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.40 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:53:14,651 INFO L168 Benchmark]: Boogie Preprocessor took 19.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:53:14,652 INFO L168 Benchmark]: RCFGBuilder took 378.70 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 690.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -750.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:53:14,653 INFO L168 Benchmark]: TraceAbstraction took 252740.65 ms. Allocated memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: 666.4 MB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -241.5 MB). Peak memory consumption was 424.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:53:14,658 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.89 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 29.40 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 19.46 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 378.70 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 690.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -750.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 252740.65 ms. Allocated memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: 666.4 MB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -241.5 MB). Peak memory consumption was 424.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (1782states) and FLOYD_HOARE automaton (currently 178 states, 198 states before enhancement),while ReachableStatesComputation was computing reachable states (1769 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. TIMEOUT Result, 252.6s OverallTime, 14 OverallIterations, 191 TraceHistogramMax, 130.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 520 SDtfs, 17421 SDslu, 6790 SDs, 0 SdLazy, 6457 SolverSat, 3938 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5117 GetRequests, 3377 SyntacticMatches, 11 SemanticMatches, 1729 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 126.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1782occurred in iteration=13, 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: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 12894 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 115.0s InterpolantComputationTime, 7713 NumberOfCodeBlocks, 7713 NumberOfCodeBlocksAsserted, 377 NumberOfCheckSat, 7688 ConstructedInterpolants, 0 QuantifiedInterpolants, 12038314 SizeOfPredicates, 33 NumberOfNonLiveVariables, 9578 ConjunctsInSsa, 1214 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 54435/369285 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown