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/seq_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:31:30,370 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:31:30,372 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:31:30,384 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:31:30,384 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:31:30,386 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:31:30,390 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:31:30,392 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:31:30,396 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:31:30,397 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:31:30,402 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:31:30,402 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:31:30,403 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:31:30,404 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:31:30,407 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:31:30,408 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:31:30,409 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:31:30,414 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:31:30,420 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:31:30,424 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:31:30,426 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:31:30,427 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:31:30,434 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:31:30,449 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 [2018-10-26 22:31:30,476 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:31:30,477 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:31:30,478 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:31:30,478 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:31:30,478 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:31:30,479 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:31:30,480 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:31:30,480 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:31:30,480 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:31:30,481 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:31:30,481 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:31:30,481 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:31:30,481 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:31:30,481 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:31:30,481 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:31:30,482 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:31:30,482 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:31:30,483 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:31:30,483 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:31:30,483 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:31:30,483 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:31:30,483 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:31:30,483 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:31:30,484 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:31:30,484 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:31:30,484 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:31:30,484 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:31:30,484 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:31:30,534 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:31:30,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:31:30,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:31:30,552 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:31:30,552 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:31:30,553 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-10-26 22:31:30,609 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d2839542a/2d5bb30739c44aa591c5f78250314a8a/FLAGfebefeb3e [2018-10-26 22:31:31,035 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:31:31,035 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-10-26 22:31:31,042 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d2839542a/2d5bb30739c44aa591c5f78250314a8a/FLAGfebefeb3e [2018-10-26 22:31:31,056 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d2839542a/2d5bb30739c44aa591c5f78250314a8a [2018-10-26 22:31:31,067 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:31:31,069 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:31:31,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:31:31,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:31:31,077 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:31:31,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f4071e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31, skipping insertion in model container [2018-10-26 22:31:31,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:31:31,117 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:31:31,337 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:31:31,342 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:31:31,369 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:31:31,389 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:31:31,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31 WrapperNode [2018-10-26 22:31:31,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:31:31,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:31:31,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:31:31,391 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:31:31,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:31:31,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:31:31,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:31:31,434 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:31:31,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (1/1) ... [2018-10-26 22:31:31,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:31:31,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:31:31,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:31:31,474 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:31:31,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (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 [2018-10-26 22:31:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:31:31,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:31:31,957 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:31:31,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:31:31 BoogieIcfgContainer [2018-10-26 22:31:31,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:31:31,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:31:31,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:31:31,964 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:31:31,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:31:31" (1/3) ... [2018-10-26 22:31:31,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131a6c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:31:31, skipping insertion in model container [2018-10-26 22:31:31,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:31:31" (2/3) ... [2018-10-26 22:31:31,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131a6c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:31:31, skipping insertion in model container [2018-10-26 22:31:31,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:31:31" (3/3) ... [2018-10-26 22:31:31,967 INFO L112 eAbstractionObserver]: Analyzing ICFG seq_true-unreach-call_true-termination.i [2018-10-26 22:31:31,977 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:31:31,986 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:31:31,999 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:31:32,030 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:31:32,031 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:31:32,032 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:31:32,032 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:31:32,032 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:31:32,032 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:31:32,032 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:31:32,033 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:31:32,033 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:31:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-26 22:31:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 22:31:32,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:32,057 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:32,061 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:32,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash 421693396, now seen corresponding path program 1 times [2018-10-26 22:31:32,069 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:32,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:32,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:32,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:32,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:32,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:31:32,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:31:32,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:31:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:31:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:31:32,194 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-26 22:31:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:32,210 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2018-10-26 22:31:32,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:31:32,212 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-26 22:31:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:32,221 INFO L225 Difference]: With dead ends: 32 [2018-10-26 22:31:32,221 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 22:31:32,224 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 [2018-10-26 22:31:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 22:31:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 22:31:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 22:31:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-26 22:31:32,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-26 22:31:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:32,262 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-26 22:31:32,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:31:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-26 22:31:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 22:31:32,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:32,264 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:32,264 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:32,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:32,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1032572958, now seen corresponding path program 1 times [2018-10-26 22:31:32,265 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:32,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:32,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:32,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:32,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:32,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:31:32,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-26 22:31:32,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:31:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:31:32,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:31:32,692 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2018-10-26 22:31:33,107 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-26 22:31:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:33,186 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-10-26 22:31:33,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:31:33,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-26 22:31:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:33,189 INFO L225 Difference]: With dead ends: 39 [2018-10-26 22:31:33,189 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 22:31:33,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:31:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 22:31:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2018-10-26 22:31:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 22:31:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-10-26 22:31:33,197 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2018-10-26 22:31:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:33,198 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-10-26 22:31:33,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:31:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-10-26 22:31:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 22:31:33,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:33,199 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:33,199 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:33,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1225079528, now seen corresponding path program 1 times [2018-10-26 22:31:33,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:33,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:33,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:33,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:33,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:33,344 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:31:33,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:31:33,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:31:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:31:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:31:33,346 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2018-10-26 22:31:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:33,446 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-26 22:31:33,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:31:33,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-26 22:31:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:33,449 INFO L225 Difference]: With dead ends: 33 [2018-10-26 22:31:33,449 INFO L226 Difference]: Without dead ends: 31 [2018-10-26 22:31:33,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:31:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-26 22:31:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-26 22:31:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 22:31:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-10-26 22:31:33,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2018-10-26 22:31:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:33,456 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-10-26 22:31:33,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:31:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-10-26 22:31:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:31:33,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:33,457 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:33,457 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:33,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1940651039, now seen corresponding path program 1 times [2018-10-26 22:31:33,458 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:33,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:33,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:33,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:33,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:33,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:33,685 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 [2018-10-26 22:31:33,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:33,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:34,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:34,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-10-26 22:31:34,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:31:34,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:31:34,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:31:34,030 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 14 states. [2018-10-26 22:31:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:34,661 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-26 22:31:34,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:31:34,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2018-10-26 22:31:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:34,663 INFO L225 Difference]: With dead ends: 51 [2018-10-26 22:31:34,663 INFO L226 Difference]: Without dead ends: 38 [2018-10-26 22:31:34,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:31:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-26 22:31:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2018-10-26 22:31:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-26 22:31:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-10-26 22:31:34,670 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-10-26 22:31:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:34,671 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-10-26 22:31:34,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:31:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-10-26 22:31:34,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:31:34,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:34,672 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:34,673 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:34,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash -816692883, now seen corresponding path program 1 times [2018-10-26 22:31:34,673 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:34,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:34,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:34,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:34,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:34,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:34,796 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 [2018-10-26 22:31:34,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:34,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:34,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:34,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-26 22:31:34,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:31:34,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:31:34,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:31:34,984 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2018-10-26 22:31:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:35,353 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-26 22:31:35,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:31:35,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-10-26 22:31:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:35,355 INFO L225 Difference]: With dead ends: 68 [2018-10-26 22:31:35,355 INFO L226 Difference]: Without dead ends: 55 [2018-10-26 22:31:35,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:31:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-26 22:31:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2018-10-26 22:31:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-26 22:31:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-10-26 22:31:35,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2018-10-26 22:31:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:35,362 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-10-26 22:31:35,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:31:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-10-26 22:31:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 22:31:35,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:35,364 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:35,364 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:35,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash -728640165, now seen corresponding path program 2 times [2018-10-26 22:31:35,365 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:35,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:35,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:35,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:35,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:35,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:35,704 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 [2018-10-26 22:31:35,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:31:35,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:31:35,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:35,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:35,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:35,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-26 22:31:35,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:31:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:31:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:31:35,769 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2018-10-26 22:31:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:36,018 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-10-26 22:31:36,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 22:31:36,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-26 22:31:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:36,020 INFO L225 Difference]: With dead ends: 42 [2018-10-26 22:31:36,020 INFO L226 Difference]: Without dead ends: 40 [2018-10-26 22:31:36,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:31:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-26 22:31:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2018-10-26 22:31:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 22:31:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-10-26 22:31:36,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2018-10-26 22:31:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:36,028 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-10-26 22:31:36,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:31:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-10-26 22:31:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 22:31:36,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:36,029 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:36,030 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:36,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash -342672732, now seen corresponding path program 3 times [2018-10-26 22:31:36,030 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:36,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:36,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:36,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:36,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:36,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:36,208 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 [2018-10-26 22:31:36,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:31:36,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 22:31:36,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:36,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:36,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:36,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-10-26 22:31:36,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:31:36,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:31:36,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:31:36,553 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 18 states. [2018-10-26 22:31:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:36,853 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2018-10-26 22:31:36,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:31:36,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-10-26 22:31:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:36,854 INFO L225 Difference]: With dead ends: 70 [2018-10-26 22:31:36,854 INFO L226 Difference]: Without dead ends: 53 [2018-10-26 22:31:36,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:31:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-26 22:31:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2018-10-26 22:31:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-26 22:31:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-10-26 22:31:36,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-10-26 22:31:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:36,863 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-10-26 22:31:36,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:31:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-10-26 22:31:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 22:31:36,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:36,865 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:36,865 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:36,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1108877104, now seen corresponding path program 1 times [2018-10-26 22:31:36,865 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:36,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:36,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:36,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:36,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:37,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:37,041 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 [2018-10-26 22:31:37,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:37,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:37,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:37,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-10-26 22:31:37,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:31:37,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:31:37,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:31:37,268 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 17 states. [2018-10-26 22:31:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:37,628 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2018-10-26 22:31:37,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:31:37,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-10-26 22:31:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:37,630 INFO L225 Difference]: With dead ends: 88 [2018-10-26 22:31:37,630 INFO L226 Difference]: Without dead ends: 71 [2018-10-26 22:31:37,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:31:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-26 22:31:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 35. [2018-10-26 22:31:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-26 22:31:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-10-26 22:31:37,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-10-26 22:31:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:37,639 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-10-26 22:31:37,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:31:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-10-26 22:31:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 22:31:37,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:37,642 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:37,643 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:37,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:37,643 INFO L82 PathProgramCache]: Analyzing trace with hash 962901692, now seen corresponding path program 2 times [2018-10-26 22:31:37,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:37,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:37,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:37,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:37,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:37,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:37,807 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 [2018-10-26 22:31:37,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:31:37,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:31:37,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:37,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:38,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:38,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-26 22:31:38,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:31:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:31:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:31:38,025 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2018-10-26 22:31:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:38,328 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2018-10-26 22:31:38,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:31:38,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2018-10-26 22:31:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:38,329 INFO L225 Difference]: With dead ends: 109 [2018-10-26 22:31:38,330 INFO L226 Difference]: Without dead ends: 92 [2018-10-26 22:31:38,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:31:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-26 22:31:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 38. [2018-10-26 22:31:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-26 22:31:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2018-10-26 22:31:38,340 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2018-10-26 22:31:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:38,341 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2018-10-26 22:31:38,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:31:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2018-10-26 22:31:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-26 22:31:38,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:38,346 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:38,346 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:38,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:38,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2116585630, now seen corresponding path program 4 times [2018-10-26 22:31:38,347 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:38,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:38,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:38,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:38,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:38,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:38,470 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 [2018-10-26 22:31:38,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:31:38,497 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:31:38,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:38,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:38,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:38,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-26 22:31:38,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:31:38,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:31:38,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:31:38,553 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2018-10-26 22:31:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:38,664 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-26 22:31:38,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:31:38,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-26 22:31:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:38,666 INFO L225 Difference]: With dead ends: 51 [2018-10-26 22:31:38,667 INFO L226 Difference]: Without dead ends: 49 [2018-10-26 22:31:38,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:31:38,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-26 22:31:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-10-26 22:31:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 22:31:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-10-26 22:31:38,677 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2018-10-26 22:31:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:38,677 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-10-26 22:31:38,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:31:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-10-26 22:31:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:31:38,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:38,679 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:38,679 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:38,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:38,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1203202969, now seen corresponding path program 5 times [2018-10-26 22:31:38,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:38,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:38,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:38,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:38,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:39,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:39,216 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 [2018-10-26 22:31:39,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:31:39,239 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-26 22:31:39,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:39,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:39,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:39,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-10-26 22:31:39,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:31:39,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:31:39,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:31:39,460 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2018-10-26 22:31:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:40,014 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-10-26 22:31:40,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:31:40,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-10-26 22:31:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:40,016 INFO L225 Difference]: With dead ends: 89 [2018-10-26 22:31:40,016 INFO L226 Difference]: Without dead ends: 68 [2018-10-26 22:31:40,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:31:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-26 22:31:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2018-10-26 22:31:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 22:31:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-26 22:31:40,027 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-26 22:31:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:40,027 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-26 22:31:40,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 22:31:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-26 22:31:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:31:40,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:40,029 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:40,029 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:40,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:40,030 INFO L82 PathProgramCache]: Analyzing trace with hash 377151475, now seen corresponding path program 2 times [2018-10-26 22:31:40,030 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:40,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:40,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:40,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:40,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:40,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:40,193 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 [2018-10-26 22:31:40,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:31:40,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:31:40,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:40,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:40,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:40,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-10-26 22:31:40,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:31:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:31:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:31:40,763 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 21 states. [2018-10-26 22:31:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:41,359 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2018-10-26 22:31:41,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:31:41,360 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2018-10-26 22:31:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:41,361 INFO L225 Difference]: With dead ends: 113 [2018-10-26 22:31:41,361 INFO L226 Difference]: Without dead ends: 92 [2018-10-26 22:31:41,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:31:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-26 22:31:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 44. [2018-10-26 22:31:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 22:31:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-26 22:31:41,372 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-26 22:31:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:41,372 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-26 22:31:41,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:31:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-26 22:31:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:31:41,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:41,374 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:41,374 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:41,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash 530751103, now seen corresponding path program 3 times [2018-10-26 22:31:41,374 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:41,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:41,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:41,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:41,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:41,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:41,517 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 [2018-10-26 22:31:41,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:31:41,550 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:31:41,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:41,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:41,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:41,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-10-26 22:31:41,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 22:31:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 22:31:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:31:41,712 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 20 states. [2018-10-26 22:31:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:42,171 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2018-10-26 22:31:42,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 22:31:42,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-10-26 22:31:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:42,172 INFO L225 Difference]: With dead ends: 135 [2018-10-26 22:31:42,172 INFO L226 Difference]: Without dead ends: 114 [2018-10-26 22:31:42,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:31:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-26 22:31:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 44. [2018-10-26 22:31:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 22:31:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-26 22:31:42,184 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-26 22:31:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:42,184 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-26 22:31:42,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 22:31:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-26 22:31:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:31:42,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:42,186 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:42,186 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:42,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:42,186 INFO L82 PathProgramCache]: Analyzing trace with hash -394227701, now seen corresponding path program 3 times [2018-10-26 22:31:42,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:42,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:42,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:42,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:42,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:42,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:42,370 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 [2018-10-26 22:31:42,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:31:42,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:31:42,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:42,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:42,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:42,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-26 22:31:42,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 22:31:42,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 22:31:42,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:31:42,549 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 19 states. [2018-10-26 22:31:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:43,190 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2018-10-26 22:31:43,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 22:31:43,190 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-10-26 22:31:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:43,191 INFO L225 Difference]: With dead ends: 160 [2018-10-26 22:31:43,191 INFO L226 Difference]: Without dead ends: 139 [2018-10-26 22:31:43,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:31:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-26 22:31:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 47. [2018-10-26 22:31:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-26 22:31:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-10-26 22:31:43,204 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2018-10-26 22:31:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:43,204 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-10-26 22:31:43,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 22:31:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-10-26 22:31:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-26 22:31:43,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:43,205 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:43,206 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:43,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 801504993, now seen corresponding path program 6 times [2018-10-26 22:31:43,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:43,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:43,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:43,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:43,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:43,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:43,454 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:43,469 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:31:43,538 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-26 22:31:43,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:43,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:43,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:43,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-26 22:31:43,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 22:31:43,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 22:31:43,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:31:43,696 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2018-10-26 22:31:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:43,820 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2018-10-26 22:31:43,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:31:43,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-26 22:31:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:43,822 INFO L225 Difference]: With dead ends: 60 [2018-10-26 22:31:43,822 INFO L226 Difference]: Without dead ends: 58 [2018-10-26 22:31:43,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:31:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-26 22:31:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2018-10-26 22:31:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-26 22:31:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2018-10-26 22:31:43,835 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 34 [2018-10-26 22:31:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:43,835 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2018-10-26 22:31:43,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 22:31:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2018-10-26 22:31:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:31:43,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:43,836 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:43,837 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:43,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash -706006742, now seen corresponding path program 7 times [2018-10-26 22:31:43,837 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:43,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:43,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:43,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:43,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:44,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:44,012 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:44,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:44,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:44,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:44,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2018-10-26 22:31:44,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:31:44,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:31:44,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:31:44,296 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 26 states. [2018-10-26 22:31:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:44,542 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2018-10-26 22:31:44,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:31:44,542 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2018-10-26 22:31:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:44,543 INFO L225 Difference]: With dead ends: 108 [2018-10-26 22:31:44,543 INFO L226 Difference]: Without dead ends: 83 [2018-10-26 22:31:44,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:31:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-26 22:31:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2018-10-26 22:31:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:31:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-26 22:31:44,555 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-26 22:31:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:44,555 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-26 22:31:44,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:31:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-26 22:31:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:31:44,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:44,556 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:44,556 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:44,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1478384714, now seen corresponding path program 4 times [2018-10-26 22:31:44,557 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:44,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:44,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:44,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:44,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:44,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:44,744 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:44,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:31:44,765 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:31:44,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:44,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:45,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:45,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2018-10-26 22:31:45,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:31:45,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:31:45,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:31:45,008 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 25 states. [2018-10-26 22:31:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:45,338 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2018-10-26 22:31:45,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:31:45,338 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-10-26 22:31:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:45,339 INFO L225 Difference]: With dead ends: 138 [2018-10-26 22:31:45,339 INFO L226 Difference]: Without dead ends: 113 [2018-10-26 22:31:45,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:31:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-26 22:31:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 53. [2018-10-26 22:31:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:31:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-26 22:31:45,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-26 22:31:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:45,353 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-26 22:31:45,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:31:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-26 22:31:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:31:45,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:45,354 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:45,354 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:45,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:45,355 INFO L82 PathProgramCache]: Analyzing trace with hash -978630334, now seen corresponding path program 5 times [2018-10-26 22:31:45,355 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:45,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:45,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:45,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:45,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:46,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:46,205 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:46,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:31:46,233 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-26 22:31:46,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:46,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:46,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:46,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2018-10-26 22:31:46,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 22:31:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 22:31:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:31:46,456 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 24 states. [2018-10-26 22:31:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:47,236 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2018-10-26 22:31:47,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:31:47,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2018-10-26 22:31:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:47,237 INFO L225 Difference]: With dead ends: 166 [2018-10-26 22:31:47,238 INFO L226 Difference]: Without dead ends: 141 [2018-10-26 22:31:47,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:31:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-26 22:31:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 53. [2018-10-26 22:31:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:31:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-26 22:31:47,258 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-26 22:31:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:47,258 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-26 22:31:47,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 22:31:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-26 22:31:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:31:47,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:47,259 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:47,260 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:47,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:47,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1618534862, now seen corresponding path program 6 times [2018-10-26 22:31:47,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:47,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:47,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:47,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:47,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:47,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:47,501 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:47,509 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:31:47,528 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-26 22:31:47,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:47,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:47,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:47,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2018-10-26 22:31:47,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 22:31:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 22:31:47,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:31:47,826 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 23 states. [2018-10-26 22:31:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:48,267 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2018-10-26 22:31:48,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:31:48,267 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2018-10-26 22:31:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:48,268 INFO L225 Difference]: With dead ends: 192 [2018-10-26 22:31:48,268 INFO L226 Difference]: Without dead ends: 167 [2018-10-26 22:31:48,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:31:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-26 22:31:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 53. [2018-10-26 22:31:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:31:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-26 22:31:48,284 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-26 22:31:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:48,285 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-26 22:31:48,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 22:31:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-26 22:31:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:31:48,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:48,286 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:48,286 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:48,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1096077990, now seen corresponding path program 4 times [2018-10-26 22:31:48,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:48,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:48,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:48,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:48,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:48,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:48,785 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:48,796 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:31:48,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:31:48,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:48,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:48,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:48,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-10-26 22:31:48,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:31:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:31:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:31:48,990 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 22 states. [2018-10-26 22:31:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:49,388 INFO L93 Difference]: Finished difference Result 221 states and 234 transitions. [2018-10-26 22:31:49,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:31:49,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2018-10-26 22:31:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:49,389 INFO L225 Difference]: With dead ends: 221 [2018-10-26 22:31:49,390 INFO L226 Difference]: Without dead ends: 196 [2018-10-26 22:31:49,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:31:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-26 22:31:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 56. [2018-10-26 22:31:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-26 22:31:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2018-10-26 22:31:49,406 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 38 [2018-10-26 22:31:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:49,406 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2018-10-26 22:31:49,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 22:31:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2018-10-26 22:31:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-26 22:31:49,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:49,407 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:49,407 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:49,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:49,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2048305116, now seen corresponding path program 8 times [2018-10-26 22:31:49,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:49,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:49,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:49,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:49,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:49,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:49,627 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:49,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:31:49,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:31:49,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:49,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:49,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:49,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-26 22:31:49,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:31:49,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:31:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:31:49,740 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 11 states. [2018-10-26 22:31:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:49,881 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2018-10-26 22:31:49,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:31:49,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-10-26 22:31:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:49,882 INFO L225 Difference]: With dead ends: 69 [2018-10-26 22:31:49,882 INFO L226 Difference]: Without dead ends: 67 [2018-10-26 22:31:49,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:31:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-26 22:31:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2018-10-26 22:31:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-26 22:31:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2018-10-26 22:31:49,898 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 40 [2018-10-26 22:31:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:49,899 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2018-10-26 22:31:49,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:31:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2018-10-26 22:31:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:31:49,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:49,899 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:49,900 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:49,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:49,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1282027757, now seen corresponding path program 9 times [2018-10-26 22:31:49,900 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:49,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:49,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:49,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:49,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:50,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:50,120 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:50,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:31:50,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 22:31:50,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:50,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:50,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:50,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2018-10-26 22:31:50,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 22:31:50,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 22:31:50,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:31:50,403 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 30 states. [2018-10-26 22:31:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:50,763 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2018-10-26 22:31:50,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:31:50,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 44 [2018-10-26 22:31:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:50,764 INFO L225 Difference]: With dead ends: 127 [2018-10-26 22:31:50,764 INFO L226 Difference]: Without dead ends: 98 [2018-10-26 22:31:50,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:31:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-26 22:31:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2018-10-26 22:31:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-26 22:31:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-26 22:31:50,785 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-26 22:31:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:50,786 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-26 22:31:50,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 22:31:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-26 22:31:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:31:50,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:50,786 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:50,786 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:50,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:50,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1037333895, now seen corresponding path program 7 times [2018-10-26 22:31:50,787 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:50,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:50,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:50,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:50,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:50,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:50,969 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:50,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:50,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:51,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:51,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2018-10-26 22:31:51,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:31:51,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:31:51,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:31:51,212 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 29 states. [2018-10-26 22:31:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:51,683 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2018-10-26 22:31:51,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:31:51,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2018-10-26 22:31:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:51,684 INFO L225 Difference]: With dead ends: 163 [2018-10-26 22:31:51,684 INFO L226 Difference]: Without dead ends: 134 [2018-10-26 22:31:51,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:31:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-26 22:31:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 62. [2018-10-26 22:31:51,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-26 22:31:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-26 22:31:51,713 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-26 22:31:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:51,714 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-26 22:31:51,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:31:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-26 22:31:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:31:51,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:51,715 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:51,715 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:51,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash -145893627, now seen corresponding path program 8 times [2018-10-26 22:31:51,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:51,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:51,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:51,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:51,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:51,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:51,931 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:51,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:31:51,958 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:31:51,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:51,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:52,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:52,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2018-10-26 22:31:52,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:31:52,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:31:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:31:52,541 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 28 states. [2018-10-26 22:31:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:53,054 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2018-10-26 22:31:53,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 22:31:53,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 44 [2018-10-26 22:31:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:53,055 INFO L225 Difference]: With dead ends: 197 [2018-10-26 22:31:53,055 INFO L226 Difference]: Without dead ends: 168 [2018-10-26 22:31:53,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:31:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-26 22:31:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 62. [2018-10-26 22:31:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-26 22:31:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-26 22:31:53,085 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-26 22:31:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:53,085 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-26 22:31:53,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:31:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-26 22:31:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:31:53,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:53,086 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:53,086 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:53,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:53,087 INFO L82 PathProgramCache]: Analyzing trace with hash 628217489, now seen corresponding path program 9 times [2018-10-26 22:31:53,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:53,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:53,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:53,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:53,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:53,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:53,392 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:53,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:31:53,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 22:31:53,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:53,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:53,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:53,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2018-10-26 22:31:53,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-26 22:31:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-26 22:31:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:31:53,684 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 27 states. [2018-10-26 22:31:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:54,608 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2018-10-26 22:31:54,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:31:54,608 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2018-10-26 22:31:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:54,610 INFO L225 Difference]: With dead ends: 229 [2018-10-26 22:31:54,610 INFO L226 Difference]: Without dead ends: 200 [2018-10-26 22:31:54,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:31:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-26 22:31:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 62. [2018-10-26 22:31:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-26 22:31:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-26 22:31:54,642 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-26 22:31:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:54,643 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-26 22:31:54,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-26 22:31:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-26 22:31:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:31:54,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:54,643 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:54,644 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:54,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:54,644 INFO L82 PathProgramCache]: Analyzing trace with hash -144160483, now seen corresponding path program 10 times [2018-10-26 22:31:54,644 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:54,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:54,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:54,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:54,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:54,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:54,801 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:54,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:31:54,825 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:31:54,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:54,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:55,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:55,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-10-26 22:31:55,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:31:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:31:55,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:31:55,058 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 26 states. [2018-10-26 22:31:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:55,575 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-10-26 22:31:55,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:31:55,575 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-10-26 22:31:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:55,576 INFO L225 Difference]: With dead ends: 259 [2018-10-26 22:31:55,576 INFO L226 Difference]: Without dead ends: 230 [2018-10-26 22:31:55,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:31:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-26 22:31:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 62. [2018-10-26 22:31:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-26 22:31:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-26 22:31:55,607 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-26 22:31:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:55,607 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-26 22:31:55,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:31:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-26 22:31:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:31:55,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:55,608 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:55,608 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:55,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash 355593897, now seen corresponding path program 5 times [2018-10-26 22:31:55,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:55,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:55,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:55,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:55,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:55,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:55,815 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:55,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:31:55,843 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 22:31:55,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:55,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:56,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:56,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-26 22:31:56,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:31:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:31:56,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:31:56,450 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 25 states. [2018-10-26 22:31:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:56,947 INFO L93 Difference]: Finished difference Result 292 states and 307 transitions. [2018-10-26 22:31:56,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 22:31:56,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2018-10-26 22:31:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:56,948 INFO L225 Difference]: With dead ends: 292 [2018-10-26 22:31:56,948 INFO L226 Difference]: Without dead ends: 263 [2018-10-26 22:31:56,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:31:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-26 22:31:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 65. [2018-10-26 22:31:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-26 22:31:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2018-10-26 22:31:56,977 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2018-10-26 22:31:56,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:56,977 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2018-10-26 22:31:56,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:31:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2018-10-26 22:31:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-26 22:31:56,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:56,978 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:56,978 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:56,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1535751271, now seen corresponding path program 10 times [2018-10-26 22:31:56,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:56,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:56,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:56,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:56,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:57,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:57,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:57,423 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:31:57,443 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:31:57,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:57,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:57,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:57,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-26 22:31:57,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 22:31:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 22:31:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:31:57,502 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 12 states. [2018-10-26 22:31:57,909 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-26 22:31:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:58,974 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2018-10-26 22:31:58,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:31:58,975 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2018-10-26 22:31:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:58,976 INFO L225 Difference]: With dead ends: 78 [2018-10-26 22:31:58,976 INFO L226 Difference]: Without dead ends: 76 [2018-10-26 22:31:58,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:31:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-26 22:31:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-10-26 22:31:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-26 22:31:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-10-26 22:31:59,005 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 46 [2018-10-26 22:31:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:59,005 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-10-26 22:31:59,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 22:31:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-10-26 22:31:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:31:59,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:59,005 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:59,006 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:59,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:59,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1714205616, now seen corresponding path program 11 times [2018-10-26 22:31:59,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:59,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:59,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:59,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:59,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:59,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:59,504 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:59,518 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:31:59,543 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-26 22:31:59,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:59,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:59,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:59,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2018-10-26 22:31:59,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 22:31:59,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 22:31:59,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:31:59,834 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 34 states. [2018-10-26 22:32:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:00,267 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2018-10-26 22:32:00,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 22:32:00,267 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2018-10-26 22:32:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:00,268 INFO L225 Difference]: With dead ends: 146 [2018-10-26 22:32:00,268 INFO L226 Difference]: Without dead ends: 113 [2018-10-26 22:32:00,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:32:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-26 22:32:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2018-10-26 22:32:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:32:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-26 22:32:00,302 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-26 22:32:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:00,302 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-26 22:32:00,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 22:32:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-26 22:32:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:32:00,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:00,303 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:00,303 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:00,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:00,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1079004100, now seen corresponding path program 11 times [2018-10-26 22:32:00,303 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:00,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:00,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:00,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:00,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:00,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:00,547 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:00,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:00,590 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-26 22:32:00,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:00,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:00,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:00,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2018-10-26 22:32:00,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:32:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:32:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:32:00,881 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 33 states. [2018-10-26 22:32:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:01,494 INFO L93 Difference]: Finished difference Result 188 states and 199 transitions. [2018-10-26 22:32:01,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:32:01,494 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 50 [2018-10-26 22:32:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:01,495 INFO L225 Difference]: With dead ends: 188 [2018-10-26 22:32:01,495 INFO L226 Difference]: Without dead ends: 155 [2018-10-26 22:32:01,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:32:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-26 22:32:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 71. [2018-10-26 22:32:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:32:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-26 22:32:01,535 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-26 22:32:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:01,535 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-26 22:32:01,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:32:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-26 22:32:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:32:01,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:01,536 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:01,537 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:01,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1523673032, now seen corresponding path program 12 times [2018-10-26 22:32:01,537 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:01,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:01,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:01,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:01,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:01,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:01,736 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:01,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:01,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 22:32:01,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:01,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:02,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:02,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2018-10-26 22:32:02,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:32:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:32:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:32:02,087 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 32 states. [2018-10-26 22:32:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:02,987 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2018-10-26 22:32:02,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-26 22:32:02,987 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2018-10-26 22:32:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:02,989 INFO L225 Difference]: With dead ends: 228 [2018-10-26 22:32:02,989 INFO L226 Difference]: Without dead ends: 195 [2018-10-26 22:32:02,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 22:32:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-26 22:32:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 71. [2018-10-26 22:32:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:32:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-26 22:32:03,043 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-26 22:32:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:03,043 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-26 22:32:03,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:32:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-26 22:32:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:32:03,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:03,044 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:03,044 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:03,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:03,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1705152084, now seen corresponding path program 13 times [2018-10-26 22:32:03,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:03,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:03,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:03,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:03,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:03,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:03,263 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:03,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:03,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:03,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:03,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2018-10-26 22:32:03,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-26 22:32:03,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-26 22:32:03,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:32:03,561 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 31 states. [2018-10-26 22:32:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:04,386 INFO L93 Difference]: Finished difference Result 266 states and 279 transitions. [2018-10-26 22:32:04,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:32:04,386 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2018-10-26 22:32:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:04,387 INFO L225 Difference]: With dead ends: 266 [2018-10-26 22:32:04,387 INFO L226 Difference]: Without dead ends: 233 [2018-10-26 22:32:04,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=2754, Unknown=0, NotChecked=0, Total=3422 [2018-10-26 22:32:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-26 22:32:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 71. [2018-10-26 22:32:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:32:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-26 22:32:04,432 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-26 22:32:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:04,432 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-26 22:32:04,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-26 22:32:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-26 22:32:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:32:04,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:04,433 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:04,433 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:04,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash -614209568, now seen corresponding path program 14 times [2018-10-26 22:32:04,434 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:04,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:04,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:04,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:04,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:04,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:04,777 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:04,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:04,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:04,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:04,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:05,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:05,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2018-10-26 22:32:05,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 22:32:05,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 22:32:05,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:32:05,043 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 30 states. [2018-10-26 22:32:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:05,900 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2018-10-26 22:32:05,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:32:05,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2018-10-26 22:32:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:05,902 INFO L225 Difference]: With dead ends: 302 [2018-10-26 22:32:05,902 INFO L226 Difference]: Without dead ends: 269 [2018-10-26 22:32:05,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 22:32:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-26 22:32:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 71. [2018-10-26 22:32:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:32:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-26 22:32:05,944 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-26 22:32:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:05,945 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-26 22:32:05,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 22:32:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-26 22:32:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:32:05,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:05,946 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:05,946 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:05,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:05,946 INFO L82 PathProgramCache]: Analyzing trace with hash 277230700, now seen corresponding path program 15 times [2018-10-26 22:32:05,946 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:05,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:05,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:05,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:05,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:06,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:06,168 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:06,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:06,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-26 22:32:06,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:06,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:06,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:06,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2018-10-26 22:32:06,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:32:06,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:32:06,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:32:06,443 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 29 states. [2018-10-26 22:32:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:07,336 INFO L93 Difference]: Finished difference Result 336 states and 351 transitions. [2018-10-26 22:32:07,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:32:07,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2018-10-26 22:32:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:07,338 INFO L225 Difference]: With dead ends: 336 [2018-10-26 22:32:07,338 INFO L226 Difference]: Without dead ends: 303 [2018-10-26 22:32:07,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:32:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-26 22:32:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 71. [2018-10-26 22:32:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-26 22:32:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-26 22:32:07,384 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-26 22:32:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:07,384 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-26 22:32:07,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:32:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-26 22:32:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:32:07,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:07,384 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:07,385 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:07,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1051341816, now seen corresponding path program 6 times [2018-10-26 22:32:07,385 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:07,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:07,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:07,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:07,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:07,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:07,829 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:07,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:07,861 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 22:32:07,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:07,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:08,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:08,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-26 22:32:08,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:32:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:32:08,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:32:08,098 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 28 states. [2018-10-26 22:32:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:08,853 INFO L93 Difference]: Finished difference Result 373 states and 390 transitions. [2018-10-26 22:32:08,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-26 22:32:08,853 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2018-10-26 22:32:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:08,855 INFO L225 Difference]: With dead ends: 373 [2018-10-26 22:32:08,855 INFO L226 Difference]: Without dead ends: 340 [2018-10-26 22:32:08,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:32:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-10-26 22:32:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 74. [2018-10-26 22:32:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-26 22:32:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2018-10-26 22:32:08,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2018-10-26 22:32:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:08,898 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2018-10-26 22:32:08,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:32:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2018-10-26 22:32:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-26 22:32:08,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:08,899 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:08,899 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:08,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:08,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1746285482, now seen corresponding path program 12 times [2018-10-26 22:32:08,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:08,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:08,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:08,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:08,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:09,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:09,171 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:09,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:09,202 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-26 22:32:09,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:09,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:09,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:09,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-26 22:32:09,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:32:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:32:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:32:09,252 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 13 states. [2018-10-26 22:32:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:09,483 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2018-10-26 22:32:09,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:32:09,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-10-26 22:32:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:09,484 INFO L225 Difference]: With dead ends: 87 [2018-10-26 22:32:09,484 INFO L226 Difference]: Without dead ends: 85 [2018-10-26 22:32:09,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:32:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-26 22:32:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2018-10-26 22:32:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-26 22:32:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2018-10-26 22:32:09,541 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 52 [2018-10-26 22:32:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:09,541 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2018-10-26 22:32:09,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:32:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2018-10-26 22:32:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:09,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:09,542 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:09,542 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:09,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:09,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1309792627, now seen corresponding path program 13 times [2018-10-26 22:32:09,542 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:09,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:09,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:09,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:09,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:09,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:09,837 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:09,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:09,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:10,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:10,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2018-10-26 22:32:10,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 22:32:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 22:32:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:32:10,259 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 38 states. [2018-10-26 22:32:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:11,006 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2018-10-26 22:32:11,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:32:11,006 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2018-10-26 22:32:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:11,007 INFO L225 Difference]: With dead ends: 165 [2018-10-26 22:32:11,007 INFO L226 Difference]: Without dead ends: 128 [2018-10-26 22:32:11,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-10-26 22:32:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-26 22:32:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2018-10-26 22:32:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-26 22:32:11,059 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-26 22:32:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:11,059 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-26 22:32:11,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 22:32:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-26 22:32:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:11,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:11,060 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:11,060 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:11,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash 658325759, now seen corresponding path program 16 times [2018-10-26 22:32:11,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:11,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:11,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:11,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:11,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:12,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:12,004 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:12,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:12,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:12,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:12,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:12,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:12,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2018-10-26 22:32:12,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:32:12,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:32:12,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:32:12,395 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 37 states. [2018-10-26 22:32:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:13,525 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2018-10-26 22:32:13,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:32:13,525 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2018-10-26 22:32:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:13,526 INFO L225 Difference]: With dead ends: 213 [2018-10-26 22:32:13,526 INFO L226 Difference]: Without dead ends: 176 [2018-10-26 22:32:13,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:32:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-26 22:32:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 80. [2018-10-26 22:32:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-26 22:32:13,597 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-26 22:32:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:13,597 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-26 22:32:13,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:32:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-26 22:32:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:13,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:13,598 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:13,598 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:13,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:13,598 INFO L82 PathProgramCache]: Analyzing trace with hash 250944395, now seen corresponding path program 17 times [2018-10-26 22:32:13,598 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:13,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:13,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:13,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:13,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:13,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:13,882 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:13,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:13,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-26 22:32:13,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:13,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:14,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:14,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2018-10-26 22:32:14,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 22:32:14,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 22:32:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:32:14,236 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 36 states. [2018-10-26 22:32:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:15,131 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-10-26 22:32:15,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:32:15,131 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2018-10-26 22:32:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:15,132 INFO L225 Difference]: With dead ends: 259 [2018-10-26 22:32:15,132 INFO L226 Difference]: Without dead ends: 222 [2018-10-26 22:32:15,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-10-26 22:32:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-26 22:32:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 80. [2018-10-26 22:32:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-26 22:32:15,194 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-26 22:32:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:15,194 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-26 22:32:15,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 22:32:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-26 22:32:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:15,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:15,195 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:15,195 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:15,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash 330967319, now seen corresponding path program 18 times [2018-10-26 22:32:15,195 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:15,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:15,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:15,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:15,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:15,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:15,422 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:15,430 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:15,453 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-26 22:32:15,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:15,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:15,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:15,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2018-10-26 22:32:15,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:32:15,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:32:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:32:15,746 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 35 states. [2018-10-26 22:32:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:16,724 INFO L93 Difference]: Finished difference Result 303 states and 317 transitions. [2018-10-26 22:32:16,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:32:16,724 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2018-10-26 22:32:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:16,726 INFO L225 Difference]: With dead ends: 303 [2018-10-26 22:32:16,726 INFO L226 Difference]: Without dead ends: 266 [2018-10-26 22:32:16,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-10-26 22:32:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-26 22:32:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 80. [2018-10-26 22:32:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-26 22:32:16,784 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-26 22:32:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:16,784 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-26 22:32:16,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:32:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-26 22:32:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:16,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:16,784 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:16,785 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:16,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1832724899, now seen corresponding path program 19 times [2018-10-26 22:32:16,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:16,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:16,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:16,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:16,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:17,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:17,003 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:17,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:17,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:17,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:17,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2018-10-26 22:32:17,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 22:32:17,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 22:32:17,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:32:17,320 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 34 states. [2018-10-26 22:32:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:18,555 INFO L93 Difference]: Finished difference Result 345 states and 360 transitions. [2018-10-26 22:32:18,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:32:18,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2018-10-26 22:32:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:18,556 INFO L225 Difference]: With dead ends: 345 [2018-10-26 22:32:18,556 INFO L226 Difference]: Without dead ends: 308 [2018-10-26 22:32:18,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-10-26 22:32:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-26 22:32:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 80. [2018-10-26 22:32:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-26 22:32:18,630 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-26 22:32:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:18,630 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-26 22:32:18,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 22:32:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-26 22:32:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:18,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:18,631 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:18,631 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:18,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:18,632 INFO L82 PathProgramCache]: Analyzing trace with hash 140434735, now seen corresponding path program 20 times [2018-10-26 22:32:18,632 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:18,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:18,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:18,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:18,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:19,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:19,389 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:19,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:19,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:19,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:19,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:19,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:19,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2018-10-26 22:32:19,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:32:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:32:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:32:19,815 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 33 states. [2018-10-26 22:32:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:20,929 INFO L93 Difference]: Finished difference Result 385 states and 401 transitions. [2018-10-26 22:32:20,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:32:20,929 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2018-10-26 22:32:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:20,930 INFO L225 Difference]: With dead ends: 385 [2018-10-26 22:32:20,930 INFO L226 Difference]: Without dead ends: 348 [2018-10-26 22:32:20,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-10-26 22:32:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-10-26 22:32:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 80. [2018-10-26 22:32:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-26 22:32:20,995 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-26 22:32:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:20,996 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-26 22:32:20,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:32:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-26 22:32:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:20,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:20,996 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:20,996 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:20,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash 321913787, now seen corresponding path program 21 times [2018-10-26 22:32:20,997 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:20,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:20,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:20,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:20,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:21,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:21,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:21,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:21,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-26 22:32:21,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:21,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:21,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:21,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2018-10-26 22:32:21,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:32:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:32:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:32:21,649 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 32 states. [2018-10-26 22:32:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:22,720 INFO L93 Difference]: Finished difference Result 423 states and 440 transitions. [2018-10-26 22:32:22,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:32:22,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2018-10-26 22:32:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:22,721 INFO L225 Difference]: With dead ends: 423 [2018-10-26 22:32:22,721 INFO L226 Difference]: Without dead ends: 386 [2018-10-26 22:32:22,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:32:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-26 22:32:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 80. [2018-10-26 22:32:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 22:32:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-26 22:32:22,808 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-26 22:32:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:22,808 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-26 22:32:22,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:32:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-26 22:32:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:32:22,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:22,809 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:22,809 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:22,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1997447865, now seen corresponding path program 7 times [2018-10-26 22:32:22,809 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:22,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:22,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:22,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:22,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:23,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:23,184 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:23,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:23,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:24,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:24,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-10-26 22:32:24,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-26 22:32:24,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-26 22:32:24,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:32:24,468 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 31 states. [2018-10-26 22:32:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:25,511 INFO L93 Difference]: Finished difference Result 464 states and 483 transitions. [2018-10-26 22:32:25,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:32:25,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-10-26 22:32:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:25,513 INFO L225 Difference]: With dead ends: 464 [2018-10-26 22:32:25,513 INFO L226 Difference]: Without dead ends: 427 [2018-10-26 22:32:25,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-10-26 22:32:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-26 22:32:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 83. [2018-10-26 22:32:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-26 22:32:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-10-26 22:32:25,602 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 56 [2018-10-26 22:32:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:25,603 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-10-26 22:32:25,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-26 22:32:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-10-26 22:32:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-26 22:32:25,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:25,604 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:25,604 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:25,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1568011757, now seen corresponding path program 14 times [2018-10-26 22:32:25,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:25,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:25,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:25,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:26,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:26,103 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:26,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:26,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:26,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:26,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:26,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:26,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-26 22:32:26,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:32:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:32:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:32:26,183 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 14 states. [2018-10-26 22:32:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:26,484 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2018-10-26 22:32:26,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 22:32:26,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-26 22:32:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:26,485 INFO L225 Difference]: With dead ends: 96 [2018-10-26 22:32:26,485 INFO L226 Difference]: Without dead ends: 94 [2018-10-26 22:32:26,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:32:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-26 22:32:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2018-10-26 22:32:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-26 22:32:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-10-26 22:32:26,560 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 58 [2018-10-26 22:32:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:26,560 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-10-26 22:32:26,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:32:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-10-26 22:32:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:26,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:26,561 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:26,561 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:26,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:26,561 INFO L82 PathProgramCache]: Analyzing trace with hash 762364470, now seen corresponding path program 15 times [2018-10-26 22:32:26,561 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:26,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:26,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:26,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:26,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:26,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:26,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:26,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-26 22:32:26,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:26,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:27,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:27,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2018-10-26 22:32:27,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:32:27,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:32:27,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:32:27,293 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 42 states. [2018-10-26 22:32:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:28,212 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2018-10-26 22:32:28,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:32:28,213 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 62 [2018-10-26 22:32:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:28,214 INFO L225 Difference]: With dead ends: 184 [2018-10-26 22:32:28,214 INFO L226 Difference]: Without dead ends: 143 [2018-10-26 22:32:28,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:32:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-26 22:32:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2018-10-26 22:32:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:28,343 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:28,344 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:28,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:32:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:28,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:28,344 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:28,345 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:28,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash -904179518, now seen corresponding path program 22 times [2018-10-26 22:32:28,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:28,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:28,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:28,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:28,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:30,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:30,265 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:30,272 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:30,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:30,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:30,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:30,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:30,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2018-10-26 22:32:30,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:32:30,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:32:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:32:30,673 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 41 states. [2018-10-26 22:32:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:31,727 INFO L93 Difference]: Finished difference Result 238 states and 251 transitions. [2018-10-26 22:32:31,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:32:31,728 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 62 [2018-10-26 22:32:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:31,729 INFO L225 Difference]: With dead ends: 238 [2018-10-26 22:32:31,729 INFO L226 Difference]: Without dead ends: 197 [2018-10-26 22:32:31,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-10-26 22:32:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-26 22:32:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 89. [2018-10-26 22:32:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:31,867 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:31,867 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:31,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:32:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:31,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:31,868 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:31,868 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:31,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash -923790770, now seen corresponding path program 23 times [2018-10-26 22:32:31,868 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:31,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:31,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:31,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:32,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:32,433 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:32,441 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:32,468 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-26 22:32:32,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:32,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:32,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:32,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2018-10-26 22:32:32,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:32:32,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:32:32,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:32:32,845 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 40 states. [2018-10-26 22:32:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:34,185 INFO L93 Difference]: Finished difference Result 290 states and 304 transitions. [2018-10-26 22:32:34,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:32:34,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 62 [2018-10-26 22:32:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:34,187 INFO L225 Difference]: With dead ends: 290 [2018-10-26 22:32:34,187 INFO L226 Difference]: Without dead ends: 249 [2018-10-26 22:32:34,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-10-26 22:32:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-26 22:32:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 89. [2018-10-26 22:32:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:34,321 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:34,321 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:34,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:32:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:34,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:34,322 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:34,322 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:34,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash 81774298, now seen corresponding path program 24 times [2018-10-26 22:32:34,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:34,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:34,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:34,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:34,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:34,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:34,645 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:34,652 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:34,681 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-26 22:32:34,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:34,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:35,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:35,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2018-10-26 22:32:35,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 22:32:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 22:32:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:32:35,032 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 39 states. [2018-10-26 22:32:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:36,388 INFO L93 Difference]: Finished difference Result 340 states and 355 transitions. [2018-10-26 22:32:36,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:32:36,388 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 62 [2018-10-26 22:32:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:36,389 INFO L225 Difference]: With dead ends: 340 [2018-10-26 22:32:36,389 INFO L226 Difference]: Without dead ends: 299 [2018-10-26 22:32:36,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-10-26 22:32:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-26 22:32:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 89. [2018-10-26 22:32:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:36,486 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:36,487 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:36,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 22:32:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:36,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:36,487 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:36,487 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:36,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash -569692570, now seen corresponding path program 25 times [2018-10-26 22:32:36,488 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:36,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:36,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:36,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:36,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:36,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:36,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:36,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:36,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:37,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:37,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 38 [2018-10-26 22:32:37,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 22:32:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 22:32:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:32:37,142 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 38 states. [2018-10-26 22:32:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:38,701 INFO L93 Difference]: Finished difference Result 388 states and 404 transitions. [2018-10-26 22:32:38,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 22:32:38,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 62 [2018-10-26 22:32:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:38,703 INFO L225 Difference]: With dead ends: 388 [2018-10-26 22:32:38,703 INFO L226 Difference]: Without dead ends: 347 [2018-10-26 22:32:38,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1119, Invalid=4887, Unknown=0, NotChecked=0, Total=6006 [2018-10-26 22:32:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-26 22:32:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 89. [2018-10-26 22:32:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:38,795 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:38,795 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:38,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 22:32:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:38,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:38,796 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:38,796 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:38,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash -977073934, now seen corresponding path program 26 times [2018-10-26 22:32:38,797 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:38,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:38,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:38,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:38,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:39,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:39,122 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:39,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:39,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:39,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:39,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:39,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:39,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 37 [2018-10-26 22:32:39,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:32:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:32:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:32:39,524 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 37 states. [2018-10-26 22:32:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:41,072 INFO L93 Difference]: Finished difference Result 434 states and 451 transitions. [2018-10-26 22:32:41,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 22:32:41,072 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 62 [2018-10-26 22:32:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:41,074 INFO L225 Difference]: With dead ends: 434 [2018-10-26 22:32:41,074 INFO L226 Difference]: Without dead ends: 393 [2018-10-26 22:32:41,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-10-26 22:32:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-10-26 22:32:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 89. [2018-10-26 22:32:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:41,179 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:41,179 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:41,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:32:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:41,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:41,180 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:41,180 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:41,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -897051010, now seen corresponding path program 27 times [2018-10-26 22:32:41,181 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:41,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:41,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:41,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:41,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:41,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:41,504 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:41,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:41,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-26 22:32:41,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:41,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:41,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:41,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2018-10-26 22:32:41,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 22:32:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 22:32:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:32:41,852 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 36 states. [2018-10-26 22:32:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:43,478 INFO L93 Difference]: Finished difference Result 478 states and 496 transitions. [2018-10-26 22:32:43,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 22:32:43,478 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 62 [2018-10-26 22:32:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:43,479 INFO L225 Difference]: With dead ends: 478 [2018-10-26 22:32:43,480 INFO L226 Difference]: Without dead ends: 437 [2018-10-26 22:32:43,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-10-26 22:32:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-10-26 22:32:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 89. [2018-10-26 22:32:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:43,584 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:43,584 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:43,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 22:32:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:43,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:43,585 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:43,585 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:43,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash 604706570, now seen corresponding path program 28 times [2018-10-26 22:32:43,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:43,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:43,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:43,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:43,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:43,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:43,904 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:43,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:43,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:43,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:43,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:44,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:44,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2018-10-26 22:32:44,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:32:44,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:32:44,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:32:44,222 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 35 states. [2018-10-26 22:32:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:45,876 INFO L93 Difference]: Finished difference Result 520 states and 539 transitions. [2018-10-26 22:32:45,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:32:45,876 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2018-10-26 22:32:45,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:45,877 INFO L225 Difference]: With dead ends: 520 [2018-10-26 22:32:45,878 INFO L226 Difference]: Without dead ends: 479 [2018-10-26 22:32:45,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-10-26 22:32:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-10-26 22:32:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 89. [2018-10-26 22:32:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-26 22:32:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-26 22:32:45,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-26 22:32:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:45,987 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-26 22:32:45,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:32:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-26 22:32:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:32:45,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:45,988 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:45,988 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:45,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1087583594, now seen corresponding path program 8 times [2018-10-26 22:32:45,988 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:45,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:45,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:45,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:45,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:46,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:46,230 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:46,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:46,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:46,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:46,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:47,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:47,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-10-26 22:32:47,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 22:32:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 22:32:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:32:47,821 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 34 states. [2018-10-26 22:32:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:49,486 INFO L93 Difference]: Finished difference Result 565 states and 586 transitions. [2018-10-26 22:32:49,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:32:49,486 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2018-10-26 22:32:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:49,488 INFO L225 Difference]: With dead ends: 565 [2018-10-26 22:32:49,488 INFO L226 Difference]: Without dead ends: 524 [2018-10-26 22:32:49,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:32:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-10-26 22:32:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 92. [2018-10-26 22:32:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-26 22:32:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2018-10-26 22:32:49,600 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 62 [2018-10-26 22:32:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:49,600 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2018-10-26 22:32:49,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 22:32:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2018-10-26 22:32:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-26 22:32:49,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:49,601 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:49,601 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:49,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2046289104, now seen corresponding path program 16 times [2018-10-26 22:32:49,601 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:49,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:49,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:49,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:49,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:49,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:49,764 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:49,772 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:49,797 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:49,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:49,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:49,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:49,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-26 22:32:49,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 22:32:49,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 22:32:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:32:49,855 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 15 states. [2018-10-26 22:32:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:50,291 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2018-10-26 22:32:50,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:32:50,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2018-10-26 22:32:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:50,292 INFO L225 Difference]: With dead ends: 105 [2018-10-26 22:32:50,292 INFO L226 Difference]: Without dead ends: 103 [2018-10-26 22:32:50,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:32:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-26 22:32:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2018-10-26 22:32:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-26 22:32:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2018-10-26 22:32:50,414 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 64 [2018-10-26 22:32:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:50,415 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2018-10-26 22:32:50,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 22:32:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2018-10-26 22:32:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:32:50,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:50,416 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:50,416 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:50,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash -904360455, now seen corresponding path program 17 times [2018-10-26 22:32:50,416 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:50,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:50,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:50,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:50,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:50,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:50,773 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:50,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:50,813 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-26 22:32:50,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:50,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:51,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:51,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2018-10-26 22:32:51,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 22:32:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 22:32:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:32:51,377 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 46 states. [2018-10-26 22:32:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:52,408 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2018-10-26 22:32:52,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 22:32:52,409 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 68 [2018-10-26 22:32:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:52,410 INFO L225 Difference]: With dead ends: 203 [2018-10-26 22:32:52,410 INFO L226 Difference]: Without dead ends: 158 [2018-10-26 22:32:52,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-10-26 22:32:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-26 22:32:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 98. [2018-10-26 22:32:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:32:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:32:52,556 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:32:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:52,556 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:32:52,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 22:32:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:32:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:32:52,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:52,556 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:52,556 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:52,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:52,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1644757893, now seen corresponding path program 29 times [2018-10-26 22:32:52,557 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:52,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:52,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:52,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:52,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:52,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:52,811 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:52,819 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:52,853 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-26 22:32:52,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:52,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:53,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:53,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2018-10-26 22:32:53,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:32:53,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:32:53,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:32:53,340 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 45 states. [2018-10-26 22:32:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:54,770 INFO L93 Difference]: Finished difference Result 263 states and 277 transitions. [2018-10-26 22:32:54,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:32:54,770 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 68 [2018-10-26 22:32:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:54,771 INFO L225 Difference]: With dead ends: 263 [2018-10-26 22:32:54,771 INFO L226 Difference]: Without dead ends: 218 [2018-10-26 22:32:54,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-10-26 22:32:54,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-26 22:32:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 98. [2018-10-26 22:32:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:32:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:32:54,898 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:32:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:54,899 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:32:54,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:32:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:32:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:32:54,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:54,899 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:54,899 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:54,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:54,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1920035857, now seen corresponding path program 30 times [2018-10-26 22:32:54,900 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:54,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:54,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:54,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:54,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:55,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:55,252 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:55,260 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:55,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-26 22:32:55,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:55,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:55,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:55,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2018-10-26 22:32:55,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:32:55,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:32:55,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:32:55,723 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 44 states. [2018-10-26 22:32:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:57,319 INFO L93 Difference]: Finished difference Result 321 states and 336 transitions. [2018-10-26 22:32:57,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-26 22:32:57,319 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 68 [2018-10-26 22:32:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:57,320 INFO L225 Difference]: With dead ends: 321 [2018-10-26 22:32:57,320 INFO L226 Difference]: Without dead ends: 276 [2018-10-26 22:32:57,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-10-26 22:32:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-26 22:32:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 98. [2018-10-26 22:32:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:32:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:32:57,480 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:32:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:57,481 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:32:57,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:32:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:32:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:32:57,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:57,482 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:57,482 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:57,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1900902499, now seen corresponding path program 31 times [2018-10-26 22:32:57,482 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:57,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:57,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:57,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:57,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:57,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:57,829 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:57,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:57,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:58,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:58,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2018-10-26 22:32:58,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-26 22:32:58,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-26 22:32:58,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:32:58,279 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 43 states. [2018-10-26 22:33:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:00,283 INFO L93 Difference]: Finished difference Result 377 states and 393 transitions. [2018-10-26 22:33:00,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-26 22:33:00,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 68 [2018-10-26 22:33:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:00,285 INFO L225 Difference]: With dead ends: 377 [2018-10-26 22:33:00,285 INFO L226 Difference]: Without dead ends: 332 [2018-10-26 22:33:00,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-10-26 22:33:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-10-26 22:33:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 98. [2018-10-26 22:33:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:33:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:33:00,436 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:33:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:00,436 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:33:00,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-26 22:33:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:33:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:33:00,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:00,437 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:00,437 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:00,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:00,437 INFO L82 PathProgramCache]: Analyzing trace with hash 727520809, now seen corresponding path program 32 times [2018-10-26 22:33:00,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:00,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:00,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:00,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:00,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:00,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:00,693 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:00,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:00,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:00,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:00,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:01,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:01,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2018-10-26 22:33:01,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:33:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:33:01,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:33:01,191 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 42 states. [2018-10-26 22:33:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:03,297 INFO L93 Difference]: Finished difference Result 431 states and 448 transitions. [2018-10-26 22:33:03,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-26 22:33:03,298 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 68 [2018-10-26 22:33:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:03,299 INFO L225 Difference]: With dead ends: 431 [2018-10-26 22:33:03,299 INFO L226 Difference]: Without dead ends: 386 [2018-10-26 22:33:03,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 22:33:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-26 22:33:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 98. [2018-10-26 22:33:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:33:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:33:03,443 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:33:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:03,443 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:33:03,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:33:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:33:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:33:03,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:03,444 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:03,444 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:03,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash 707909557, now seen corresponding path program 33 times [2018-10-26 22:33:03,444 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:03,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:03,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:03,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:03,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:03,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:03,766 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:03,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:03,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 22:33:03,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:03,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:04,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:04,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2018-10-26 22:33:04,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:33:04,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:33:04,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:33:04,383 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 41 states. [2018-10-26 22:33:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:06,583 INFO L93 Difference]: Finished difference Result 483 states and 501 transitions. [2018-10-26 22:33:06,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-26 22:33:06,583 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 68 [2018-10-26 22:33:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:06,584 INFO L225 Difference]: With dead ends: 483 [2018-10-26 22:33:06,584 INFO L226 Difference]: Without dead ends: 438 [2018-10-26 22:33:06,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 22:33:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-10-26 22:33:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 98. [2018-10-26 22:33:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:33:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:33:06,727 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:33:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:06,727 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:33:06,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:33:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:33:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:33:06,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:06,728 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:06,728 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:06,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:06,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1713474625, now seen corresponding path program 34 times [2018-10-26 22:33:06,728 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:06,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:06,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:06,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:06,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:06,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:06,967 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:06,974 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:07,002 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:07,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:07,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:07,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:07,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2018-10-26 22:33:07,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:33:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:33:07,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:33:07,404 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 40 states. [2018-10-26 22:33:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:09,739 INFO L93 Difference]: Finished difference Result 533 states and 552 transitions. [2018-10-26 22:33:09,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-26 22:33:09,739 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 68 [2018-10-26 22:33:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:09,741 INFO L225 Difference]: With dead ends: 533 [2018-10-26 22:33:09,741 INFO L226 Difference]: Without dead ends: 488 [2018-10-26 22:33:09,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-10-26 22:33:09,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-10-26 22:33:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 98. [2018-10-26 22:33:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:33:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:33:09,886 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:33:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:09,887 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:33:09,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:33:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:33:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:33:09,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:09,887 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:09,887 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:09,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1062007757, now seen corresponding path program 35 times [2018-10-26 22:33:09,888 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:09,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:09,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:09,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:09,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:10,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:10,142 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:10,152 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:10,182 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-26 22:33:10,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:10,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:10,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:10,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 39 [2018-10-26 22:33:10,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 22:33:10,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 22:33:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:33:10,542 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 39 states. [2018-10-26 22:33:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:12,930 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-10-26 22:33:12,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-26 22:33:12,930 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 68 [2018-10-26 22:33:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:12,932 INFO L225 Difference]: With dead ends: 581 [2018-10-26 22:33:12,932 INFO L226 Difference]: Without dead ends: 536 [2018-10-26 22:33:12,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-10-26 22:33:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2018-10-26 22:33:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 98. [2018-10-26 22:33:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:33:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:33:13,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:33:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:13,089 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:33:13,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 22:33:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:33:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:33:13,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:13,090 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:13,090 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:13,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash 654626393, now seen corresponding path program 36 times [2018-10-26 22:33:13,091 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:13,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:13,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:13,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:13,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:13,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:13,340 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:13,347 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:13,378 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-26 22:33:13,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:13,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:13,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:13,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2018-10-26 22:33:13,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 22:33:13,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 22:33:13,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:33:13,789 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 38 states. [2018-10-26 22:33:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:16,150 INFO L93 Difference]: Finished difference Result 627 states and 648 transitions. [2018-10-26 22:33:16,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-26 22:33:16,150 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2018-10-26 22:33:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:16,152 INFO L225 Difference]: With dead ends: 627 [2018-10-26 22:33:16,152 INFO L226 Difference]: Without dead ends: 582 [2018-10-26 22:33:16,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-10-26 22:33:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-10-26 22:33:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 98. [2018-10-26 22:33:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:33:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-26 22:33:16,312 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-26 22:33:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:16,313 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-26 22:33:16,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 22:33:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-26 22:33:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:33:16,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:16,314 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:16,314 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:16,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash 734649317, now seen corresponding path program 9 times [2018-10-26 22:33:16,314 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:16,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:16,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:16,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:16,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:16,555 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:16,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:16,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 22:33:16,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:16,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:16,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:16,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-26 22:33:16,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:33:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:33:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:33:16,968 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 37 states. [2018-10-26 22:33:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:19,305 INFO L93 Difference]: Finished difference Result 676 states and 699 transitions. [2018-10-26 22:33:19,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-26 22:33:19,305 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2018-10-26 22:33:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:19,307 INFO L225 Difference]: With dead ends: 676 [2018-10-26 22:33:19,307 INFO L226 Difference]: Without dead ends: 631 [2018-10-26 22:33:19,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-10-26 22:33:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2018-10-26 22:33:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 101. [2018-10-26 22:33:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-26 22:33:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2018-10-26 22:33:19,485 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 68 [2018-10-26 22:33:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:19,486 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2018-10-26 22:33:19,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:33:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2018-10-26 22:33:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-26 22:33:19,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:19,486 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:19,487 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:19,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash -492584077, now seen corresponding path program 18 times [2018-10-26 22:33:19,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:19,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:19,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:19,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:19,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:19,789 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:19,803 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:19,869 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-26 22:33:19,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:19,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:19,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:19,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-26 22:33:19,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:33:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:33:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:33:19,909 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 16 states. [2018-10-26 22:33:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:20,426 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2018-10-26 22:33:20,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:33:20,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2018-10-26 22:33:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:20,427 INFO L225 Difference]: With dead ends: 114 [2018-10-26 22:33:20,427 INFO L226 Difference]: Without dead ends: 112 [2018-10-26 22:33:20,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:33:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-26 22:33:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2018-10-26 22:33:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-26 22:33:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2018-10-26 22:33:20,603 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 70 [2018-10-26 22:33:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:20,603 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2018-10-26 22:33:20,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:33:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2018-10-26 22:33:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:20,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:20,604 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:20,604 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:20,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1538237252, now seen corresponding path program 19 times [2018-10-26 22:33:20,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:20,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:20,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:20,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:20,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:20,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:20,926 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:20,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:20,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:21,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:21,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2018-10-26 22:33:21,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-26 22:33:21,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-26 22:33:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1955, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:33:21,515 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 50 states. [2018-10-26 22:33:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:22,820 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2018-10-26 22:33:22,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 22:33:22,821 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2018-10-26 22:33:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:22,821 INFO L225 Difference]: With dead ends: 222 [2018-10-26 22:33:22,822 INFO L226 Difference]: Without dead ends: 173 [2018-10-26 22:33:22,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-10-26 22:33:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-26 22:33:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 107. [2018-10-26 22:33:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:23,036 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:23,036 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:23,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-26 22:33:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:23,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:23,037 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:23,037 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:23,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:23,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1354925752, now seen corresponding path program 37 times [2018-10-26 22:33:23,037 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:23,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:23,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:23,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:23,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:23,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:23,366 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:23,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:23,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:23,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:23,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2018-10-26 22:33:23,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-26 22:33:23,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-26 22:33:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1890, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:33:23,924 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 49 states. [2018-10-26 22:33:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:25,787 INFO L93 Difference]: Finished difference Result 288 states and 303 transitions. [2018-10-26 22:33:25,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 22:33:25,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 74 [2018-10-26 22:33:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:25,788 INFO L225 Difference]: With dead ends: 288 [2018-10-26 22:33:25,788 INFO L226 Difference]: Without dead ends: 239 [2018-10-26 22:33:25,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-10-26 22:33:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-26 22:33:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 107. [2018-10-26 22:33:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:25,990 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:25,990 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:25,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-26 22:33:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:25,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:25,990 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:25,991 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:25,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:25,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1201686740, now seen corresponding path program 38 times [2018-10-26 22:33:25,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:25,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:25,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:25,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:25,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:27,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:27,500 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:27,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:27,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:27,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:27,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:28,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:28,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 48 [2018-10-26 22:33:28,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-26 22:33:28,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-26 22:33:28,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:33:28,656 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 48 states. [2018-10-26 22:33:30,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:30,990 INFO L93 Difference]: Finished difference Result 352 states and 368 transitions. [2018-10-26 22:33:30,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 22:33:30,990 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 74 [2018-10-26 22:33:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:30,991 INFO L225 Difference]: With dead ends: 352 [2018-10-26 22:33:30,991 INFO L226 Difference]: Without dead ends: 303 [2018-10-26 22:33:30,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-10-26 22:33:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-26 22:33:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 107. [2018-10-26 22:33:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:31,195 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:31,195 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:31,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-26 22:33:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:31,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:31,196 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:31,196 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:31,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1521906848, now seen corresponding path program 39 times [2018-10-26 22:33:31,196 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:31,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:31,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:31,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:31,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:31,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:31,892 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:31,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:31,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-26 22:33:31,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:31,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:33,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:33,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 47 [2018-10-26 22:33:33,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-26 22:33:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-26 22:33:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:33:33,437 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 47 states. [2018-10-26 22:33:36,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:36,214 INFO L93 Difference]: Finished difference Result 414 states and 431 transitions. [2018-10-26 22:33:36,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-26 22:33:36,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 74 [2018-10-26 22:33:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:36,215 INFO L225 Difference]: With dead ends: 414 [2018-10-26 22:33:36,215 INFO L226 Difference]: Without dead ends: 365 [2018-10-26 22:33:36,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-10-26 22:33:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-10-26 22:33:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 107. [2018-10-26 22:33:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:36,433 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:36,433 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:36,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-26 22:33:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:36,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:36,434 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:36,434 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:36,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1027211500, now seen corresponding path program 40 times [2018-10-26 22:33:36,434 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:36,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:36,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:36,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:36,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:38,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:38,116 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:38,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:33:38,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:33:38,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:38,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:38,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:38,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2018-10-26 22:33:38,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 22:33:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 22:33:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:33:38,649 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 46 states. [2018-10-26 22:33:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:41,421 INFO L93 Difference]: Finished difference Result 474 states and 492 transitions. [2018-10-26 22:33:41,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-26 22:33:41,421 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 74 [2018-10-26 22:33:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:41,423 INFO L225 Difference]: With dead ends: 474 [2018-10-26 22:33:41,423 INFO L226 Difference]: Without dead ends: 425 [2018-10-26 22:33:41,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-10-26 22:33:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2018-10-26 22:33:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 107. [2018-10-26 22:33:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:41,645 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:41,645 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:41,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 22:33:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:41,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:41,646 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:41,646 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:41,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:41,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1302489464, now seen corresponding path program 41 times [2018-10-26 22:33:41,646 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:41,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:41,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:41,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:42,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:42,203 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:42,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:33:42,245 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-26 22:33:42,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:42,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:42,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:42,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 45 [2018-10-26 22:33:42,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:33:42,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:33:42,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:33:42,731 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 45 states. [2018-10-26 22:33:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:45,844 INFO L93 Difference]: Finished difference Result 532 states and 551 transitions. [2018-10-26 22:33:45,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-26 22:33:45,845 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 74 [2018-10-26 22:33:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:45,846 INFO L225 Difference]: With dead ends: 532 [2018-10-26 22:33:45,846 INFO L226 Difference]: Without dead ends: 483 [2018-10-26 22:33:45,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3183 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1759, Invalid=7943, Unknown=0, NotChecked=0, Total=9702 [2018-10-26 22:33:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-10-26 22:33:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 107. [2018-10-26 22:33:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:46,081 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:46,081 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:46,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:33:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:46,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:46,082 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:46,082 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:46,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1776518404, now seen corresponding path program 42 times [2018-10-26 22:33:46,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:46,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:46,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:46,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:46,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:46,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:46,358 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:46,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:33:46,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-26 22:33:46,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:46,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:46,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:46,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 44 [2018-10-26 22:33:46,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:33:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:33:46,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:33:46,834 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 44 states. [2018-10-26 22:33:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:50,152 INFO L93 Difference]: Finished difference Result 588 states and 608 transitions. [2018-10-26 22:33:50,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-26 22:33:50,152 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 74 [2018-10-26 22:33:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:50,153 INFO L225 Difference]: With dead ends: 588 [2018-10-26 22:33:50,154 INFO L226 Difference]: Without dead ends: 539 [2018-10-26 22:33:50,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-10-26 22:33:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2018-10-26 22:33:50,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 107. [2018-10-26 22:33:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:50,383 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:50,383 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:50,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:33:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:50,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:50,384 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:50,384 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:50,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:50,384 INFO L82 PathProgramCache]: Analyzing trace with hash 109974416, now seen corresponding path program 43 times [2018-10-26 22:33:50,384 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:50,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:50,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:50,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:50,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:50,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:50,677 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:50,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:50,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:51,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:51,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 43 [2018-10-26 22:33:51,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-26 22:33:51,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-26 22:33:51,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:33:51,179 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 43 states. [2018-10-26 22:33:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:54,631 INFO L93 Difference]: Finished difference Result 642 states and 663 transitions. [2018-10-26 22:33:54,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-26 22:33:54,631 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 74 [2018-10-26 22:33:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:54,633 INFO L225 Difference]: With dead ends: 642 [2018-10-26 22:33:54,633 INFO L226 Difference]: Without dead ends: 593 [2018-10-26 22:33:54,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-10-26 22:33:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-10-26 22:33:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 107. [2018-10-26 22:33:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:54,874 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:54,875 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:54,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-26 22:33:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:54,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:54,875 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:54,875 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:54,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash 90363164, now seen corresponding path program 44 times [2018-10-26 22:33:54,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:54,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:54,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:54,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:54,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:55,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:55,470 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:55,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:55,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:55,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:55,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:55,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:55,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 42 [2018-10-26 22:33:55,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:33:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:33:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:33:55,915 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 42 states. [2018-10-26 22:33:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:59,344 INFO L93 Difference]: Finished difference Result 694 states and 716 transitions. [2018-10-26 22:33:59,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-26 22:33:59,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 74 [2018-10-26 22:33:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:59,346 INFO L225 Difference]: With dead ends: 694 [2018-10-26 22:33:59,346 INFO L226 Difference]: Without dead ends: 645 [2018-10-26 22:33:59,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-10-26 22:33:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2018-10-26 22:33:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 107. [2018-10-26 22:33:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:33:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:33:59,585 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:33:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:59,585 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:33:59,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:33:59,585 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:33:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:33:59,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:59,586 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:59,586 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:59,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1095928232, now seen corresponding path program 45 times [2018-10-26 22:33:59,586 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:59,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:59,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:59,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:59,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:59,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:59,937 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:59,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:59,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-26 22:33:59,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:59,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:00,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:00,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2018-10-26 22:34:00,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:34:00,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:34:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:34:00,629 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 41 states. [2018-10-26 22:34:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:03,949 INFO L93 Difference]: Finished difference Result 744 states and 767 transitions. [2018-10-26 22:34:03,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-26 22:34:03,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 74 [2018-10-26 22:34:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:03,951 INFO L225 Difference]: With dead ends: 744 [2018-10-26 22:34:03,951 INFO L226 Difference]: Without dead ends: 695 [2018-10-26 22:34:03,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-10-26 22:34:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2018-10-26 22:34:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 107. [2018-10-26 22:34:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-26 22:34:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-26 22:34:04,197 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-26 22:34:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:04,197 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-26 22:34:04,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:34:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-26 22:34:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:34:04,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:04,198 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:04,199 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:04,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash 444461364, now seen corresponding path program 10 times [2018-10-26 22:34:04,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:04,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:04,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:04,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:04,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:04,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:04,479 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:04,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:04,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:04,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:04,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:05,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:05,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-26 22:34:05,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:34:05,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:34:05,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:34:05,028 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 40 states. [2018-10-26 22:34:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:08,360 INFO L93 Difference]: Finished difference Result 797 states and 822 transitions. [2018-10-26 22:34:08,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 22:34:08,361 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2018-10-26 22:34:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:08,363 INFO L225 Difference]: With dead ends: 797 [2018-10-26 22:34:08,363 INFO L226 Difference]: Without dead ends: 748 [2018-10-26 22:34:08,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-10-26 22:34:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-10-26 22:34:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 110. [2018-10-26 22:34:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-26 22:34:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2018-10-26 22:34:08,629 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 74 [2018-10-26 22:34:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:08,629 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2018-10-26 22:34:08,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:34:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2018-10-26 22:34:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-26 22:34:08,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:08,630 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:08,630 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:08,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash -929558858, now seen corresponding path program 20 times [2018-10-26 22:34:08,631 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:08,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:08,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:08,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:08,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:08,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:08,828 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:08,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:08,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:08,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:08,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:09,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:09,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-26 22:34:09,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:34:09,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:34:09,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:34:09,132 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 17 states. [2018-10-26 22:34:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:09,837 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2018-10-26 22:34:09,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 22:34:09,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2018-10-26 22:34:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:09,838 INFO L225 Difference]: With dead ends: 123 [2018-10-26 22:34:09,838 INFO L226 Difference]: Without dead ends: 121 [2018-10-26 22:34:09,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:34:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-26 22:34:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2018-10-26 22:34:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-26 22:34:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2018-10-26 22:34:10,091 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 76 [2018-10-26 22:34:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:10,091 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2018-10-26 22:34:10,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:34:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2018-10-26 22:34:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:10,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:10,092 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:10,092 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:10,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1797828993, now seen corresponding path program 21 times [2018-10-26 22:34:10,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:10,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:10,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:10,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:10,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:10,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:10,554 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:10,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:10,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-26 22:34:10,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:10,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:11,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:11,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2018-10-26 22:34:11,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-26 22:34:11,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-26 22:34:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:34:11,316 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 54 states. [2018-10-26 22:34:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:13,117 INFO L93 Difference]: Finished difference Result 241 states and 256 transitions. [2018-10-26 22:34:13,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:34:13,117 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 80 [2018-10-26 22:34:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:13,118 INFO L225 Difference]: With dead ends: 241 [2018-10-26 22:34:13,118 INFO L226 Difference]: Without dead ends: 188 [2018-10-26 22:34:13,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-10-26 22:34:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-26 22:34:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2018-10-26 22:34:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:13,403 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:13,403 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:13,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-26 22:34:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:13,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:13,404 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:13,404 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:13,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 375902731, now seen corresponding path program 46 times [2018-10-26 22:34:13,404 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:13,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:13,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:13,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:13,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:13,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:13,729 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:13,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:13,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:13,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:13,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:14,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:14,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2018-10-26 22:34:14,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-26 22:34:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-26 22:34:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:34:14,355 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 53 states. [2018-10-26 22:34:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:16,812 INFO L93 Difference]: Finished difference Result 313 states and 329 transitions. [2018-10-26 22:34:16,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:34:16,812 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 80 [2018-10-26 22:34:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:16,813 INFO L225 Difference]: With dead ends: 313 [2018-10-26 22:34:16,813 INFO L226 Difference]: Without dead ends: 260 [2018-10-26 22:34:16,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-10-26 22:34:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-10-26 22:34:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 116. [2018-10-26 22:34:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:17,129 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:17,129 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:17,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-26 22:34:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:17,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:17,130 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:17,130 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:17,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1964755095, now seen corresponding path program 47 times [2018-10-26 22:34:17,130 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:17,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:17,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:17,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:17,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:17,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:17,762 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:17,769 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:17,826 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:34:17,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:17,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:18,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:18,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 52 [2018-10-26 22:34:18,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-26 22:34:18,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-26 22:34:18,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:34:18,566 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 52 states. [2018-10-26 22:34:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:21,733 INFO L93 Difference]: Finished difference Result 383 states and 400 transitions. [2018-10-26 22:34:21,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 22:34:21,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 80 [2018-10-26 22:34:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:21,735 INFO L225 Difference]: With dead ends: 383 [2018-10-26 22:34:21,735 INFO L226 Difference]: Without dead ends: 330 [2018-10-26 22:34:21,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-10-26 22:34:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-10-26 22:34:22,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 116. [2018-10-26 22:34:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:22,067 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:22,067 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:22,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-26 22:34:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:22,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:22,068 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:22,068 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:22,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:22,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2033447459, now seen corresponding path program 48 times [2018-10-26 22:34:22,068 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:22,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:22,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:22,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:22,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:22,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:22,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:22,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:22,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-26 22:34:22,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:22,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:23,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:23,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 51 [2018-10-26 22:34:23,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-26 22:34:23,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-26 22:34:23,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 22:34:23,050 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 51 states. [2018-10-26 22:34:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:26,562 INFO L93 Difference]: Finished difference Result 451 states and 469 transitions. [2018-10-26 22:34:26,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-26 22:34:26,562 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 80 [2018-10-26 22:34:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:26,563 INFO L225 Difference]: With dead ends: 451 [2018-10-26 22:34:26,563 INFO L226 Difference]: Without dead ends: 398 [2018-10-26 22:34:26,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-10-26 22:34:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-26 22:34:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 116. [2018-10-26 22:34:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:26,868 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:26,868 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:26,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-26 22:34:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:26,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:26,869 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:26,869 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:26,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2078208337, now seen corresponding path program 49 times [2018-10-26 22:34:26,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:26,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:26,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:26,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:26,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:27,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:27,197 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:27,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:27,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:27,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:27,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2018-10-26 22:34:27,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-26 22:34:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-26 22:34:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1995, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 22:34:27,765 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 50 states. [2018-10-26 22:34:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:31,640 INFO L93 Difference]: Finished difference Result 517 states and 536 transitions. [2018-10-26 22:34:31,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-26 22:34:31,640 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 80 [2018-10-26 22:34:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:31,642 INFO L225 Difference]: With dead ends: 517 [2018-10-26 22:34:31,642 INFO L226 Difference]: Without dead ends: 464 [2018-10-26 22:34:31,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-10-26 22:34:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2018-10-26 22:34:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 116. [2018-10-26 22:34:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:31,983 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:31,984 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:31,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-26 22:34:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:31,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:31,984 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:31,984 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:31,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash 478404155, now seen corresponding path program 50 times [2018-10-26 22:34:31,985 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:31,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:31,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:31,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:34:31,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:32,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:32,445 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:32,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:34:32,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:34:32,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:32,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:33,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:33,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2018-10-26 22:34:33,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-26 22:34:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-26 22:34:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1917, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:34:33,080 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 49 states. [2018-10-26 22:34:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:37,406 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-10-26 22:34:37,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-26 22:34:37,406 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2018-10-26 22:34:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:37,407 INFO L225 Difference]: With dead ends: 581 [2018-10-26 22:34:37,407 INFO L226 Difference]: Without dead ends: 528 [2018-10-26 22:34:37,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-10-26 22:34:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2018-10-26 22:34:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 116. [2018-10-26 22:34:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:37,753 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:37,753 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:37,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-26 22:34:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:37,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:37,754 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:37,754 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:37,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2049777863, now seen corresponding path program 51 times [2018-10-26 22:34:37,755 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:37,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:37,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:37,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:37,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:38,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:38,330 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:38,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:34:38,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-26 22:34:38,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:38,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:38,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:38,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 48 [2018-10-26 22:34:38,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-26 22:34:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-26 22:34:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:34:38,914 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 48 states. [2018-10-26 22:34:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:43,609 INFO L93 Difference]: Finished difference Result 643 states and 664 transitions. [2018-10-26 22:34:43,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-26 22:34:43,609 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 80 [2018-10-26 22:34:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:43,611 INFO L225 Difference]: With dead ends: 643 [2018-10-26 22:34:43,611 INFO L226 Difference]: Without dead ends: 590 [2018-10-26 22:34:43,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-10-26 22:34:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2018-10-26 22:34:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 116. [2018-10-26 22:34:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:43,956 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:43,956 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:43,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-26 22:34:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:43,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:43,957 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:43,958 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:43,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash 303928915, now seen corresponding path program 52 times [2018-10-26 22:34:43,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:43,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:43,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:43,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:43,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:44,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:44,266 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:44,274 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:34:44,306 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:34:44,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:44,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:44,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:44,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 47 [2018-10-26 22:34:44,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-26 22:34:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-26 22:34:44,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 22:34:44,834 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 47 states. [2018-10-26 22:34:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:49,477 INFO L93 Difference]: Finished difference Result 703 states and 725 transitions. [2018-10-26 22:34:49,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-26 22:34:49,477 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 80 [2018-10-26 22:34:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:49,479 INFO L225 Difference]: With dead ends: 703 [2018-10-26 22:34:49,480 INFO L226 Difference]: Without dead ends: 650 [2018-10-26 22:34:49,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3875 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-10-26 22:34:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2018-10-26 22:34:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 116. [2018-10-26 22:34:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:49,810 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:49,810 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:49,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-26 22:34:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:49,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:49,811 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:49,811 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:49,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:49,811 INFO L82 PathProgramCache]: Analyzing trace with hash 579206879, now seen corresponding path program 53 times [2018-10-26 22:34:49,811 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:49,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:49,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:49,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:49,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:50,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:50,137 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:50,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:34:50,189 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:34:50,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:50,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:50,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:50,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 46 [2018-10-26 22:34:50,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 22:34:50,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 22:34:50,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:34:50,681 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 46 states. [2018-10-26 22:34:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:34:55,448 INFO L93 Difference]: Finished difference Result 761 states and 784 transitions. [2018-10-26 22:34:55,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-26 22:34:55,448 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 80 [2018-10-26 22:34:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:34:55,450 INFO L225 Difference]: With dead ends: 761 [2018-10-26 22:34:55,450 INFO L226 Difference]: Without dead ends: 708 [2018-10-26 22:34:55,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-10-26 22:34:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2018-10-26 22:34:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 116. [2018-10-26 22:34:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:34:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:34:55,791 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:34:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:34:55,791 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:34:55,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 22:34:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:34:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:34:55,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:34:55,792 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:34:55,792 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:34:55,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:34:55,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1053235819, now seen corresponding path program 54 times [2018-10-26 22:34:55,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:34:55,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:34:55,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:55,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:34:55,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:34:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:34:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:56,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:34:56,114 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:34:56,123 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:34:56,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-26 22:34:56,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:34:56,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:34:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:34:56,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:34:56,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2018-10-26 22:34:56,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:34:56,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:34:56,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:34:56,857 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 45 states. [2018-10-26 22:35:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:01,539 INFO L93 Difference]: Finished difference Result 817 states and 841 transitions. [2018-10-26 22:35:01,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-26 22:35:01,539 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 80 [2018-10-26 22:35:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:01,542 INFO L225 Difference]: With dead ends: 817 [2018-10-26 22:35:01,542 INFO L226 Difference]: Without dead ends: 764 [2018-10-26 22:35:01,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-10-26 22:35:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-10-26 22:35:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 116. [2018-10-26 22:35:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:35:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:35:01,901 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:35:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:01,902 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:35:01,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:35:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:35:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:35:01,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:01,902 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:01,902 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:01,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash -613308169, now seen corresponding path program 55 times [2018-10-26 22:35:01,903 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:01,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:01,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:01,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:01,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:02,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:02,221 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:02,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:02,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:02,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:02,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2018-10-26 22:35:02,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:35:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:35:02,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1497, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:35:02,780 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 44 states. [2018-10-26 22:35:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:07,697 INFO L93 Difference]: Finished difference Result 871 states and 896 transitions. [2018-10-26 22:35:07,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-26 22:35:07,698 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2018-10-26 22:35:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:07,700 INFO L225 Difference]: With dead ends: 871 [2018-10-26 22:35:07,700 INFO L226 Difference]: Without dead ends: 818 [2018-10-26 22:35:07,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-10-26 22:35:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2018-10-26 22:35:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 116. [2018-10-26 22:35:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-26 22:35:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-26 22:35:08,081 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-26 22:35:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:08,082 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-26 22:35:08,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:35:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-26 22:35:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:35:08,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:08,082 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:08,082 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:08,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:08,082 INFO L82 PathProgramCache]: Analyzing trace with hash -632919421, now seen corresponding path program 11 times [2018-10-26 22:35:08,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:08,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:08,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:08,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:35:08,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:08,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:08,394 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:08,402 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:35:08,445 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:35:08,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:08,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:08,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:08,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-10-26 22:35:08,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-26 22:35:08,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-26 22:35:08,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:35:08,863 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 43 states. [2018-10-26 22:35:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:13,603 INFO L93 Difference]: Finished difference Result 928 states and 955 transitions. [2018-10-26 22:35:13,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 22:35:13,604 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2018-10-26 22:35:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:13,607 INFO L225 Difference]: With dead ends: 928 [2018-10-26 22:35:13,607 INFO L226 Difference]: Without dead ends: 875 [2018-10-26 22:35:13,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-10-26 22:35:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2018-10-26 22:35:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 119. [2018-10-26 22:35:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-26 22:35:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2018-10-26 22:35:13,976 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 80 [2018-10-26 22:35:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:13,977 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2018-10-26 22:35:13,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-26 22:35:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2018-10-26 22:35:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 22:35:13,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:13,977 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:13,977 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:13,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:13,978 INFO L82 PathProgramCache]: Analyzing trace with hash -5497607, now seen corresponding path program 22 times [2018-10-26 22:35:13,978 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:13,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:13,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:13,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:13,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:14,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:14,249 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:14,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:35:14,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:35:14,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:14,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:14,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:14,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-26 22:35:14,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:35:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:35:14,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:35:14,424 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 18 states. [2018-10-26 22:35:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:15,307 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2018-10-26 22:35:15,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 22:35:15,307 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-10-26 22:35:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:15,308 INFO L225 Difference]: With dead ends: 132 [2018-10-26 22:35:15,308 INFO L226 Difference]: Without dead ends: 130 [2018-10-26 22:35:15,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:35:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-26 22:35:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2018-10-26 22:35:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-26 22:35:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2018-10-26 22:35:15,677 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 82 [2018-10-26 22:35:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:15,678 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2018-10-26 22:35:15,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:35:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2018-10-26 22:35:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-26 22:35:15,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:15,678 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:15,678 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:15,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash -354122942, now seen corresponding path program 23 times [2018-10-26 22:35:15,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:15,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:15,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:15,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:15,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:16,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:16,042 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:16,049 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:35:16,092 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-26 22:35:16,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:16,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:16,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:16,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 58 [2018-10-26 22:35:16,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-26 22:35:16,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-26 22:35:16,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2645, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 22:35:16,885 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 58 states. [2018-10-26 22:35:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:19,080 INFO L93 Difference]: Finished difference Result 260 states and 276 transitions. [2018-10-26 22:35:19,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-26 22:35:19,080 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 86 [2018-10-26 22:35:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:19,081 INFO L225 Difference]: With dead ends: 260 [2018-10-26 22:35:19,081 INFO L226 Difference]: Without dead ends: 203 [2018-10-26 22:35:19,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1403, Invalid=5907, Unknown=0, NotChecked=0, Total=7310 [2018-10-26 22:35:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-26 22:35:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 125. [2018-10-26 22:35:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-26 22:35:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-26 22:35:19,476 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-26 22:35:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:19,476 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-26 22:35:19,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-26 22:35:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-26 22:35:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-26 22:35:19,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:19,476 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:19,477 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:19,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1095815730, now seen corresponding path program 56 times [2018-10-26 22:35:19,477 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:19,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:19,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:19,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:19,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:19,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:19,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:19,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:35:19,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:35:19,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:19,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:20,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:20,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2018-10-26 22:35:20,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-26 22:35:20,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-26 22:35:20,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=2570, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 22:35:20,561 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 57 states. [2018-10-26 22:35:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:23,728 INFO L93 Difference]: Finished difference Result 338 states and 355 transitions. [2018-10-26 22:35:23,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:35:23,729 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2018-10-26 22:35:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:23,730 INFO L225 Difference]: With dead ends: 338 [2018-10-26 22:35:23,730 INFO L226 Difference]: Without dead ends: 281 [2018-10-26 22:35:23,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=7601, Unknown=0, NotChecked=0, Total=9312 [2018-10-26 22:35:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-26 22:35:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 125. [2018-10-26 22:35:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-26 22:35:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-26 22:35:24,155 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-26 22:35:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:24,156 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-26 22:35:24,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-26 22:35:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-26 22:35:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-26 22:35:24,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:24,156 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:24,156 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:24,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash 905644890, now seen corresponding path program 57 times [2018-10-26 22:35:24,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:24,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:24,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:24,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:24,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:24,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:24,560 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:24,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:35:24,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-26 22:35:24,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:24,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:25,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:25,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 56 [2018-10-26 22:35:25,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-26 22:35:25,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-26 22:35:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=2493, Unknown=0, NotChecked=0, Total=3080 [2018-10-26 22:35:25,252 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 56 states. [2018-10-26 22:35:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:29,187 INFO L93 Difference]: Finished difference Result 414 states and 432 transitions. [2018-10-26 22:35:29,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-26 22:35:29,187 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 86 [2018-10-26 22:35:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:29,189 INFO L225 Difference]: With dead ends: 414 [2018-10-26 22:35:29,189 INFO L226 Difference]: Without dead ends: 357 [2018-10-26 22:35:29,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2008, Invalid=9122, Unknown=0, NotChecked=0, Total=11130 [2018-10-26 22:35:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-10-26 22:35:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 125. [2018-10-26 22:35:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-26 22:35:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-26 22:35:29,609 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-26 22:35:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:29,609 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-26 22:35:29,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-26 22:35:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-26 22:35:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-26 22:35:29,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:29,609 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:29,610 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:29,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1787241498, now seen corresponding path program 58 times [2018-10-26 22:35:29,610 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:29,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:29,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:29,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:29,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:30,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:30,009 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:30,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:35:30,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:35:30,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:30,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:30,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:30,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2018-10-26 22:35:30,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-26 22:35:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-26 22:35:30,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2414, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:35:30,701 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 55 states. [2018-10-26 22:35:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:35:34,938 INFO L93 Difference]: Finished difference Result 488 states and 507 transitions. [2018-10-26 22:35:34,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-26 22:35:34,939 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2018-10-26 22:35:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:35:34,940 INFO L225 Difference]: With dead ends: 488 [2018-10-26 22:35:34,940 INFO L226 Difference]: Without dead ends: 431 [2018-10-26 22:35:34,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2267, Invalid=10389, Unknown=0, NotChecked=0, Total=12656 [2018-10-26 22:35:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-10-26 22:35:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 125. [2018-10-26 22:35:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-26 22:35:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-26 22:35:35,375 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-26 22:35:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:35:35,376 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-26 22:35:35,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-26 22:35:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-26 22:35:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-26 22:35:35,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:35:35,376 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:35:35,376 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:35:35,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:35:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash 386490226, now seen corresponding path program 59 times [2018-10-26 22:35:35,377 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:35:35,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:35:35,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:35,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:35:35,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:35:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:35:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 300 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:35,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:35:35,736 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:35:35,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:35:35,783 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-26 22:35:35,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:35:35,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:35:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 300 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:35:36,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:35:36,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2018-10-26 22:35:36,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-26 22:35:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-26 22:35:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2018-10-26 22:35:36,394 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 54 states. Received shutdown request... [2018-10-26 22:35:37,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:35:37,616 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 22:35:37,619 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 22:35:37,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:35:37 BoogieIcfgContainer [2018-10-26 22:35:37,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:35:37,620 INFO L168 Benchmark]: Toolchain (without parser) took 246552.62 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 625.0 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -590.8 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. [2018-10-26 22:35:37,621 INFO L168 Benchmark]: CDTParser took 0.24 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. [2018-10-26 22:35:37,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.04 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. [2018-10-26 22:35:37,621 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.72 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. [2018-10-26 22:35:37,622 INFO L168 Benchmark]: Boogie Preprocessor took 36.24 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. [2018-10-26 22:35:37,622 INFO L168 Benchmark]: RCFGBuilder took 488.77 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 699.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -747.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-26 22:35:37,622 INFO L168 Benchmark]: TraceAbstraction took 245659.82 ms. Allocated memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: -75.0 MB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 146.6 MB). Peak memory consumption was 71.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:35:37,624 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 320.04 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 42.72 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 36.24 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 488.77 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 699.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -747.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245659.82 ms. Allocated memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: -75.0 MB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 146.6 MB). Peak memory consumption was 71.6 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 (125states) and FLOYD_HOARE automaton (currently 32 states, 54 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 79 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. TIMEOUT Result, 245.5s OverallTime, 96 OverallIterations, 13 TraceHistogramMax, 155.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3139 SDtfs, 15001 SDslu, 33490 SDs, 0 SdLazy, 27828 SolverSat, 4720 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10240 GetRequests, 4463 SyntacticMatches, 0 SemanticMatches, 5776 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135674 ImplicationChecksByTransitivity, 117.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=92, 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: 13.0s AutomataMinimizationTime, 95 MinimizatonAttempts, 19653 StatesRemovedByMinimization, 94 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 70.4s InterpolantComputationTime, 11066 NumberOfCodeBlocks, 11066 NumberOfCodeBlocksAsserted, 575 NumberOfCheckSat, 10877 ConstructedInterpolants, 0 QuantifiedInterpolants, 4300086 SizeOfPredicates, 443 NumberOfNonLiveVariables, 14908 ConjunctsInSsa, 1976 ConjunctsInUnsatCore, 189 InterpolantComputations, 3 PerfectInterpolantSequences, 25046/36410 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown