java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 01:11:26,057 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 01:11:26,059 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 01:11:26,070 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-01 01:11:26,070 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-01 01:11:26,071 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-01 01:11:26,073 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-01 01:11:26,075 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-01 01:11:26,076 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-01 01:11:26,077 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-01 01:11:26,078 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-01 01:11:26,078 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-01 01:11:26,079 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-01 01:11:26,080 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-01 01:11:26,081 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-01 01:11:26,082 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-01 01:11:26,083 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-01 01:11:26,085 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-01 01:11:26,087 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-01 01:11:26,089 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-01 01:11:26,090 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-01 01:11:26,091 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-01 01:11:26,093 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-01 01:11:26,094 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-01 01:11:26,094 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-01 01:11:26,095 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-01 01:11:26,096 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-01 01:11:26,097 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-01 01:11:26,098 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-01 01:11:26,099 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-01 01:11:26,099 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-01 01:11:26,100 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-01 01:11:26,100 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-01 01:11:26,100 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-01 01:11:26,102 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-01 01:11:26,102 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-01 01:11:26,103 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-01 01:11:26,133 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 01:11:26,133 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 01:11:26,134 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 01:11:26,138 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 01:11:26,138 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 01:11:26,139 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 01:11:26,139 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 01:11:26,139 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 01:11:26,139 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 01:11:26,140 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 01:11:26,140 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 01:11:26,140 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 01:11:26,140 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 01:11:26,143 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 01:11:26,143 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 01:11:26,143 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 01:11:26,143 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 01:11:26,143 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 01:11:26,144 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 01:11:26,144 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 01:11:26,144 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 01:11:26,144 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 01:11:26,144 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 01:11:26,145 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 01:11:26,145 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 01:11:26,145 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 01:11:26,146 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 01:11:26,146 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 01:11:26,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 01:11:26,146 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 01:11:26,146 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 01:11:26,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 01:11:26,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 01:11:26,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 01:11:26,230 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 01:11:26,231 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 01:11:26,231 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-01 01:11:26,232 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-01 01:11:26,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 01:11:26,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 01:11:26,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 01:11:26,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 01:11:26,281 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 01:11:26,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,319 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-01 01:11:26,319 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-01 01:11:26,319 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-01 01:11:26,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 01:11:26,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 01:11:26,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 01:11:26,322 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 01:11:26,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... [2018-10-01 01:11:26,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 01:11:26,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 01:11:26,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 01:11:26,345 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 01:11:26,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-01 01:11:26,416 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-01 01:11:26,637 INFO L345 CfgBuilder]: Using library mode [2018-10-01 01:11:26,638 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 01:11:26 BoogieIcfgContainer [2018-10-01 01:11:26,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 01:11:26,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 01:11:26,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 01:11:26,648 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 01:11:26,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:11:26" (1/2) ... [2018-10-01 01:11:26,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29612d5f and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 01:11:26, skipping insertion in model container [2018-10-01 01:11:26,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 01:11:26" (2/2) ... [2018-10-01 01:11:26,654 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-01 01:11:26,668 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 01:11:26,678 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-01 01:11:26,724 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 01:11:26,725 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 01:11:26,725 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 01:11:26,726 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 01:11:26,726 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 01:11:26,726 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 01:11:26,726 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 01:11:26,726 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 01:11:26,727 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 01:11:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-01 01:11:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 01:11:26,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:26,750 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-01 01:11:26,752 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:26,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-01 01:11:26,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:26,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:26,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:26,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:26,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:26,908 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 01:11:26,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-01 01:11:26,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 01:11:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 01:11:26,925 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:26,927 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-01 01:11:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:27,174 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-01 01:11:27,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 01:11:27,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-01 01:11:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:27,186 INFO L225 Difference]: With dead ends: 17 [2018-10-01 01:11:27,187 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 01:11:27,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 01:11:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 01:11:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 01:11:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-01 01:11:27,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-01 01:11:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:27,221 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-01 01:11:27,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 01:11:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-01 01:11:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 01:11:27,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:27,222 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-01 01:11:27,223 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:27,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:27,223 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-01 01:11:27,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:27,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:27,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:27,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:27,257 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 01:11:27,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-01 01:11:27,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 01:11:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 01:11:27,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:27,260 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-01 01:11:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:27,327 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-01 01:11:27,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 01:11:27,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-01 01:11:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:27,328 INFO L225 Difference]: With dead ends: 11 [2018-10-01 01:11:27,328 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 01:11:27,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 01:11:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 01:11:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 01:11:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-01 01:11:27,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-01 01:11:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:27,333 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-01 01:11:27,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 01:11:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-01 01:11:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 01:11:27,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:27,334 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-01 01:11:27,334 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:27,334 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-01 01:11:27,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:27,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:27,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:27,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:27,406 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 01:11:27,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 01:11:27,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 01:11:27,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 01:11:27,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:27,407 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-01 01:11:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:27,549 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-01 01:11:27,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 01:11:27,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 01:11:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:27,551 INFO L225 Difference]: With dead ends: 11 [2018-10-01 01:11:27,551 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 01:11:27,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 01:11:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 01:11:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 01:11:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-01 01:11:27,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-01 01:11:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:27,554 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-01 01:11:27,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 01:11:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-01 01:11:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 01:11:27,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:27,555 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-01 01:11:27,556 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:27,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:27,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-01 01:11:27,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:27,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:27,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:27,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:27,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:27,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:27,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:27,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:27,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:27,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-01 01:11:27,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 01:11:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 01:11:27,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:27,896 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-01 01:11:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:28,062 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-01 01:11:28,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 01:11:28,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-01 01:11:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:28,064 INFO L225 Difference]: With dead ends: 14 [2018-10-01 01:11:28,065 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 01:11:28,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 01:11:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-01 01:11:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 01:11:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-01 01:11:28,069 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-01 01:11:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:28,069 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-01 01:11:28,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 01:11:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-01 01:11:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 01:11:28,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:28,070 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-01 01:11:28,071 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:28,071 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-01 01:11:28,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:28,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:28,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:28,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:28,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:28,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:28,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:28,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:28,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:28,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:28,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:28,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:28,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:11:28,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:11:28,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:11:28,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:28,334 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-01 01:11:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:28,459 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-01 01:11:28,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:11:28,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-01 01:11:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:28,460 INFO L225 Difference]: With dead ends: 15 [2018-10-01 01:11:28,461 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 01:11:28,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 01:11:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 01:11:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 01:11:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-01 01:11:28,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-01 01:11:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:28,466 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-01 01:11:28,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:11:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-01 01:11:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 01:11:28,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:28,467 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-01 01:11:28,467 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:28,467 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:28,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-01 01:11:28,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:28,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:28,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:28,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:28,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:28,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:28,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:28,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:28,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-01 01:11:28,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:28,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:28,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:28,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:11:28,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:11:28,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:11:28,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:28,617 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-01 01:11:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:29,016 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-01 01:11:29,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:11:29,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-01 01:11:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:29,018 INFO L225 Difference]: With dead ends: 13 [2018-10-01 01:11:29,018 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 01:11:29,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 01:11:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-01 01:11:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 01:11:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-01 01:11:29,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-01 01:11:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:29,026 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-01 01:11:29,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:11:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-01 01:11:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:11:29,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:29,027 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-01 01:11:29,028 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:29,028 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:29,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-01 01:11:29,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:29,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:29,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:29,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:29,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:29,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:29,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:29,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:29,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:29,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-01 01:11:29,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:11:29,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:11:29,299 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:29,300 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-01 01:11:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:29,463 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-01 01:11:29,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:11:29,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-01 01:11:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:29,465 INFO L225 Difference]: With dead ends: 17 [2018-10-01 01:11:29,466 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 01:11:29,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 01:11:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-01 01:11:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 01:11:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-01 01:11:29,469 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-01 01:11:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:29,469 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-01 01:11:29,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:11:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-01 01:11:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 01:11:29,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:29,470 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-01 01:11:29,471 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:29,471 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-01 01:11:29,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:29,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:29,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:29,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:29,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:29,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:29,602 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-01 01:11:29,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:29,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:29,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:11:29,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:11:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:11:29,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:29,654 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-01 01:11:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:29,773 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-01 01:11:29,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:11:29,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-01 01:11:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:29,775 INFO L225 Difference]: With dead ends: 18 [2018-10-01 01:11:29,775 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 01:11:29,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 01:11:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 01:11:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 01:11:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-01 01:11:29,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-01 01:11:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:29,780 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-01 01:11:29,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:11:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-01 01:11:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 01:11:29,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:29,781 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-01 01:11:29,781 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:29,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:29,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-01 01:11:29,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:29,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:29,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:29,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:29,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:29,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:29,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-01 01:11:29,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:29,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:29,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:29,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:11:29,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:11:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:11:29,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:29,954 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-01 01:11:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:30,068 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-01 01:11:30,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:11:30,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-01 01:11:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:30,070 INFO L225 Difference]: With dead ends: 15 [2018-10-01 01:11:30,070 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 01:11:30,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 01:11:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-01 01:11:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 01:11:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-01 01:11:30,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-01 01:11:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:30,073 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-01 01:11:30,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:11:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-01 01:11:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:11:30,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:30,074 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-01 01:11:30,074 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:30,074 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-01 01:11:30,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:30,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:30,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:30,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:30,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:30,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:30,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:30,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:30,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:30,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:11:30,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:11:30,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:11:30,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:30,283 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-01 01:11:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:30,608 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-01 01:11:30,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:11:30,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-01 01:11:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:30,609 INFO L225 Difference]: With dead ends: 20 [2018-10-01 01:11:30,609 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 01:11:30,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 01:11:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-01 01:11:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:11:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-01 01:11:30,613 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-01 01:11:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:30,613 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-01 01:11:30,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:11:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-01 01:11:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 01:11:30,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:30,614 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-01 01:11:30,614 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:30,614 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-01 01:11:30,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:30,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:30,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:30,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:30,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:30,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:30,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:30,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:30,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:30,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:30,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:30,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:11:30,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:11:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:11:30,766 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:30,766 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-01 01:11:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:30,893 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-01 01:11:30,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:11:30,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-01 01:11:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:30,894 INFO L225 Difference]: With dead ends: 21 [2018-10-01 01:11:30,895 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 01:11:30,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 01:11:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 01:11:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 01:11:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-01 01:11:30,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-01 01:11:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:30,900 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-01 01:11:30,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:11:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-01 01:11:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 01:11:30,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:30,901 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-01 01:11:30,902 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:30,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-01 01:11:30,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:30,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:30,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:30,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:31,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:31,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-01 01:11:31,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:31,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:31,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:31,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:11:31,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:11:31,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:11:31,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:31,074 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-01 01:11:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:31,216 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-01 01:11:31,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:11:31,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-01 01:11:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:31,217 INFO L225 Difference]: With dead ends: 17 [2018-10-01 01:11:31,218 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 01:11:31,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 01:11:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-01 01:11:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:11:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-01 01:11:31,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-01 01:11:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:31,223 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-01 01:11:31,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:11:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-01 01:11:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:11:31,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:31,224 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-01 01:11:31,224 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:31,224 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-01 01:11:31,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:31,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:31,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:31,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:31,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:31,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:31,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:31,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:31,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:31,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:31,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:31,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:31,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:11:31,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:11:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:11:31,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:31,413 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-01 01:11:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:31,675 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-01 01:11:31,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:11:31,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-01 01:11:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:31,677 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:11:31,677 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 01:11:31,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 01:11:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-01 01:11:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:11:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-01 01:11:31,682 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-01 01:11:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:31,682 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-01 01:11:31,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:11:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-01 01:11:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 01:11:31,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:31,683 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-01 01:11:31,684 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:31,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-01 01:11:31,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:31,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:31,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:31,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:31,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:31,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:31,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:31,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:31,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 01:11:31,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:31,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:31,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:31,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:11:31,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:11:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:11:31,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:31,862 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-01 01:11:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:31,966 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-01 01:11:31,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:11:31,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-01 01:11:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:31,973 INFO L225 Difference]: With dead ends: 24 [2018-10-01 01:11:31,973 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 01:11:31,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 01:11:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 01:11:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 01:11:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-01 01:11:31,976 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-01 01:11:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:31,976 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-01 01:11:31,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:11:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-01 01:11:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 01:11:31,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:31,977 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-01 01:11:31,978 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:31,978 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-01 01:11:31,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:31,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:31,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:31,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:31,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:32,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:32,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:32,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:32,060 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-01 01:11:32,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:32,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:32,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:32,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:11:32,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:11:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:11:32,121 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:32,121 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-01 01:11:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:32,217 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-01 01:11:32,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:11:32,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-01 01:11:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:32,219 INFO L225 Difference]: With dead ends: 19 [2018-10-01 01:11:32,219 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 01:11:32,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 01:11:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-01 01:11:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:11:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-01 01:11:32,223 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-01 01:11:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:32,224 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-01 01:11:32,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:11:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-01 01:11:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:11:32,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:32,225 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-01 01:11:32,225 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:32,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-01 01:11:32,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:32,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:32,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:32,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:32,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:32,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:32,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:32,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:32,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:32,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:32,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:11:32,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:11:32,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:11:32,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:32,597 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-01 01:11:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:32,951 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-01 01:11:32,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:11:32,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-01 01:11:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:32,952 INFO L225 Difference]: With dead ends: 26 [2018-10-01 01:11:32,952 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:11:32,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:11:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-01 01:11:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:11:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-01 01:11:32,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-01 01:11:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:32,957 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-01 01:11:32,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:11:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-01 01:11:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 01:11:32,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:32,958 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-01 01:11:32,958 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:32,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-01 01:11:32,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:32,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:32,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:32,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:32,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:33,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:33,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:33,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:33,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:33,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:33,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:33,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:33,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:11:33,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:11:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:11:33,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:33,241 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-01 01:11:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:33,470 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-01 01:11:33,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:11:33,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-01 01:11:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:33,471 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:11:33,471 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 01:11:33,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 01:11:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 01:11:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 01:11:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-01 01:11:33,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-01 01:11:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:33,475 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-01 01:11:33,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:11:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-01 01:11:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 01:11:33,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:33,476 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-01 01:11:33,477 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:33,477 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-01 01:11:33,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:33,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:33,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:33,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:33,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:33,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:33,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:33,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:33,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 01:11:33,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:33,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:33,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:33,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:11:33,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:11:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:11:33,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:33,867 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-01 01:11:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:33,988 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-01 01:11:33,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:11:33,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-01 01:11:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:33,990 INFO L225 Difference]: With dead ends: 21 [2018-10-01 01:11:33,990 INFO L226 Difference]: Without dead ends: 18 [2018-10-01 01:11:33,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:11:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-01 01:11:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-01 01:11:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:11:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-01 01:11:33,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-01 01:11:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:33,994 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-01 01:11:33,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:11:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-01 01:11:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:11:33,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:33,995 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-01 01:11:33,995 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:33,995 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-01 01:11:33,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:33,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:33,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:33,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:33,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:34,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:34,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:34,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:34,147 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:34,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:34,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:34,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:34,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:11:34,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:11:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:11:34,389 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:34,389 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-01 01:11:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:35,025 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-01 01:11:35,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:11:35,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-01 01:11:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:35,026 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:11:35,026 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 01:11:35,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 01:11:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-01 01:11:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:11:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-01 01:11:35,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-01 01:11:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:35,030 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-01 01:11:35,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:11:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-01 01:11:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 01:11:35,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:35,031 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-01 01:11:35,032 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:35,032 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:35,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-01 01:11:35,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:35,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:35,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:35,109 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:35,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-01 01:11:35,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:35,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:35,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:11:35,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:11:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:11:35,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:35,200 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-01 01:11:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:35,397 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-01 01:11:35,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:11:35,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-01 01:11:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:35,398 INFO L225 Difference]: With dead ends: 30 [2018-10-01 01:11:35,398 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 01:11:35,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:11:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 01:11:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 01:11:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 01:11:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-01 01:11:35,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-01 01:11:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:35,404 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-01 01:11:35,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:11:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-01 01:11:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 01:11:35,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:35,405 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-01 01:11:35,406 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:35,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-01 01:11:35,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:35,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:35,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:35,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:35,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:35,528 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:35,539 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-01 01:11:35,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:35,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:35,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:11:35,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:11:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:11:35,606 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:35,606 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-01 01:11:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:35,750 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-01 01:11:35,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:11:35,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-01 01:11:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:35,751 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:11:35,751 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 01:11:35,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 01:11:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-01 01:11:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:11:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-01 01:11:35,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-01 01:11:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:35,756 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-01 01:11:35,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:11:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-01 01:11:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:11:35,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:35,757 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-01 01:11:35,757 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:35,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-01 01:11:35,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:35,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:35,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:35,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:35,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:35,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:35,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:35,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:35,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:11:35,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:11:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:11:35,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:35,995 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-01 01:11:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:36,670 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-01 01:11:36,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:11:36,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-01 01:11:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:36,672 INFO L225 Difference]: With dead ends: 32 [2018-10-01 01:11:36,673 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:11:36,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:11:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-01 01:11:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:11:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-01 01:11:36,676 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-01 01:11:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:36,677 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-01 01:11:36,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:11:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-01 01:11:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 01:11:36,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:36,678 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-01 01:11:36,678 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:36,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-01 01:11:36,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:36,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:36,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:36,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:36,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:36,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:36,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:36,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:36,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:36,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:36,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:36,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:36,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:36,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:36,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:36,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:36,911 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-01 01:11:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:37,081 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-01 01:11:37,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:37,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-01 01:11:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:37,084 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:11:37,084 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 01:11:37,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 01:11:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 01:11:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 01:11:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-01 01:11:37,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-01 01:11:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:37,089 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-01 01:11:37,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-01 01:11:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 01:11:37,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:37,090 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-01 01:11:37,090 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:37,090 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-01 01:11:37,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:37,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:37,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:37,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:37,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:37,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:37,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:37,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-01 01:11:37,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:37,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:37,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:37,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:37,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:37,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:37,698 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-01 01:11:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:37,928 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-01 01:11:37,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:37,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-01 01:11:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:37,929 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:11:37,929 INFO L226 Difference]: Without dead ends: 22 [2018-10-01 01:11:37,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:11:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-01 01:11:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-01 01:11:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:11:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-01 01:11:37,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-01 01:11:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:37,933 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-01 01:11:37,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-01 01:11:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:11:37,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:37,934 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-01 01:11:37,934 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:37,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-01 01:11:37,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:37,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:37,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:37,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:37,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:38,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:38,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:38,120 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:38,133 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:38,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:38,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:38,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:38,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:11:38,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:11:38,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:11:38,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:38,201 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-01 01:11:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:38,992 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-01 01:11:38,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:11:38,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-01 01:11:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:38,993 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:11:38,993 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 01:11:38,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 01:11:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-01 01:11:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:11:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-01 01:11:38,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-01 01:11:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:39,000 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-01 01:11:39,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:11:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-01 01:11:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 01:11:39,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:39,000 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-01 01:11:39,001 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:39,001 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-01 01:11:39,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:39,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:39,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:39,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:39,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:39,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:39,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:39,348 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:39,401 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 01:11:39,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:39,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:39,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:39,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:11:39,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:11:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:11:39,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:39,546 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-01 01:11:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:39,722 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-01 01:11:39,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:11:39,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-01 01:11:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:39,723 INFO L225 Difference]: With dead ends: 36 [2018-10-01 01:11:39,723 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:11:39,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:11:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:11:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 01:11:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 01:11:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-01 01:11:39,728 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-01 01:11:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:39,728 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-01 01:11:39,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:11:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-01 01:11:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 01:11:39,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:39,729 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-01 01:11:39,729 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:39,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-01 01:11:39,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:39,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:39,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:39,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:39,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:39,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:39,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:39,853 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:39,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 01:11:39,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:39,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:39,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:39,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:11:39,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:11:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:11:39,933 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:39,933 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-01 01:11:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:40,082 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-01 01:11:40,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:11:40,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-01 01:11:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:40,083 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:11:40,083 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 01:11:40,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 01:11:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-01 01:11:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:11:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-01 01:11:40,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-01 01:11:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:40,088 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-01 01:11:40,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:11:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-01 01:11:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-01 01:11:40,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:40,090 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-01 01:11:40,090 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:40,090 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-01 01:11:40,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:40,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:40,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:40,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:40,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:40,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:40,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:40,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:40,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:40,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:40,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:11:40,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:11:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:11:40,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:40,663 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-01 01:11:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:41,446 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-01 01:11:41,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:11:41,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-01 01:11:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:41,447 INFO L225 Difference]: With dead ends: 38 [2018-10-01 01:11:41,447 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:11:41,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:11:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:11:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-01 01:11:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:11:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-01 01:11:41,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-01 01:11:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:41,452 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-01 01:11:41,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:11:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-01 01:11:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 01:11:41,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:41,453 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-01 01:11:41,453 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:41,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-01 01:11:41,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:41,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:41,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:41,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:41,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:41,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:41,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:41,634 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:41,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:41,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:41,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:41,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 01:11:41,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 01:11:41,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 01:11:41,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:41,720 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-01 01:11:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:41,924 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-01 01:11:41,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 01:11:41,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-01 01:11:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:41,925 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:11:41,925 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 01:11:41,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 01:11:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 01:11:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 01:11:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-01 01:11:41,930 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-01 01:11:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:41,930 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-01 01:11:41,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 01:11:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-01 01:11:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 01:11:41,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:41,931 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-01 01:11:41,931 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:41,931 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-01 01:11:41,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:41,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:41,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:41,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:42,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:42,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:42,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:42,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 01:11:42,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:42,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:42,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:42,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 01:11:42,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 01:11:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 01:11:42,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:42,773 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-01 01:11:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:42,945 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-01 01:11:42,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 01:11:42,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-01 01:11:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:42,946 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:11:42,946 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 01:11:42,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:11:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 01:11:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-01 01:11:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:11:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-01 01:11:42,950 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-01 01:11:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:42,951 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-01 01:11:42,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 01:11:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-01 01:11:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-01 01:11:42,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:42,951 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-01 01:11:42,952 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:42,952 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:42,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-01 01:11:42,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:42,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:42,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:42,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:42,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:43,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:43,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:43,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:43,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:43,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:43,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:43,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:43,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:11:43,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 01:11:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 01:11:43,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:43,282 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-01 01:11:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:44,492 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-01 01:11:44,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 01:11:44,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-01 01:11:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:44,494 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:11:44,494 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 01:11:44,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 01:11:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-01 01:11:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:11:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-01 01:11:44,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-01 01:11:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:44,499 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-01 01:11:44,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 01:11:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-01 01:11:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 01:11:44,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:44,500 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-01 01:11:44,500 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:44,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-01 01:11:44,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:44,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:44,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:44,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:44,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:44,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:44,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:44,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:44,629 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:11:44,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:44,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:44,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:44,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 01:11:44,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 01:11:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 01:11:44,722 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:44,722 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-01 01:11:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:44,964 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-01 01:11:44,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 01:11:44,965 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-01 01:11:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:44,966 INFO L225 Difference]: With dead ends: 42 [2018-10-01 01:11:44,966 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:11:44,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:11:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 01:11:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 01:11:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-01 01:11:44,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-01 01:11:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:44,972 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-01 01:11:44,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 01:11:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-01 01:11:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 01:11:44,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:44,973 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-01 01:11:44,973 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:44,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-01 01:11:44,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:44,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:44,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:44,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:44,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:45,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:45,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:45,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:11:45,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:45,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:45,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 01:11:45,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 01:11:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 01:11:45,499 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:45,499 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-01 01:11:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:45,659 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-01 01:11:45,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 01:11:45,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-01 01:11:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:45,660 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:11:45,660 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 01:11:45,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:11:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 01:11:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-01 01:11:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:11:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-01 01:11:45,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-01 01:11:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:45,665 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-01 01:11:45,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 01:11:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-01 01:11:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-01 01:11:45,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:45,665 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-01 01:11:45,666 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:45,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-01 01:11:45,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:45,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:45,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:45,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:45,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:45,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:45,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:45,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:45,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 01:11:45,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 01:11:45,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 01:11:45,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:45,986 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-01 01:11:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:46,999 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-01 01:11:46,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 01:11:47,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-01 01:11:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:47,001 INFO L225 Difference]: With dead ends: 44 [2018-10-01 01:11:47,001 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:11:47,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:11:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 01:11:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-01 01:11:47,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-01 01:11:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:47,005 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-01 01:11:47,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 01:11:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-01 01:11:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 01:11:47,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:47,006 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-01 01:11:47,006 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:47,006 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:47,006 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-01 01:11:47,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:47,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:47,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:47,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:47,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:47,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:47,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:47,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:47,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:47,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:47,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:47,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:47,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 01:11:47,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 01:11:47,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 01:11:47,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:47,246 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-01 01:11:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:47,555 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-01 01:11:47,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 01:11:47,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-01 01:11:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:47,556 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:11:47,557 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:11:47,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:11:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 01:11:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 01:11:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-01 01:11:47,561 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-01 01:11:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:47,561 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-01 01:11:47,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 01:11:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-01 01:11:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 01:11:47,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:47,562 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-01 01:11:47,562 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:47,563 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:47,563 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-01 01:11:47,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:47,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:47,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:47,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:47,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:47,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:47,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:47,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:47,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 01:11:47,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:47,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:47,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:47,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 01:11:47,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 01:11:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 01:11:47,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:47,826 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-01 01:11:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:48,312 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-01 01:11:48,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 01:11:48,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-01 01:11:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:48,313 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:11:48,313 INFO L226 Difference]: Without dead ends: 30 [2018-10-01 01:11:48,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-01 01:11:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-01 01:11:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:11:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-01 01:11:48,317 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-01 01:11:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:48,317 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-01 01:11:48,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 01:11:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-01 01:11:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-01 01:11:48,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:48,318 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-01 01:11:48,318 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:48,318 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-01 01:11:48,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:48,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:48,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:48,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:48,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:48,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:48,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:48,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:48,621 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:48,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:48,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:48,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:48,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 01:11:48,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 01:11:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 01:11:48,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:48,699 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-01 01:11:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:50,078 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-01 01:11:50,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 01:11:50,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-01 01:11:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:50,084 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:11:50,084 INFO L226 Difference]: Without dead ends: 44 [2018-10-01 01:11:50,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-01 01:11:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-01 01:11:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-01 01:11:50,087 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-01 01:11:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:50,087 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-01 01:11:50,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 01:11:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-01 01:11:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 01:11:50,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:50,088 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-01 01:11:50,088 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:50,089 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-01 01:11:50,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:50,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:50,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:50,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:50,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:50,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:50,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:50,479 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:50,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 01:11:50,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:50,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:50,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:50,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 01:11:50,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 01:11:50,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 01:11:50,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:50,629 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-01 01:11:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:50,943 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-01 01:11:50,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 01:11:50,944 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-01 01:11:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:50,945 INFO L225 Difference]: With dead ends: 48 [2018-10-01 01:11:50,945 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:11:50,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:11:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:11:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 01:11:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 01:11:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-01 01:11:50,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-01 01:11:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:50,949 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-01 01:11:50,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 01:11:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-01 01:11:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 01:11:50,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:50,950 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-01 01:11:50,950 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:50,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-01 01:11:50,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:50,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:50,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:50,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:50,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:51,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:51,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:51,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:51,519 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 01:11:51,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:51,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:51,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:51,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 01:11:51,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 01:11:51,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 01:11:51,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:51,628 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-01 01:11:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:51,835 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-01 01:11:51,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 01:11:51,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-01 01:11:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:51,836 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:11:51,837 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 01:11:51,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:11:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 01:11:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-01 01:11:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:11:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-01 01:11:51,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-01 01:11:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:51,841 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-01 01:11:51,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 01:11:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-01 01:11:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-01 01:11:51,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:51,842 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-01 01:11:51,842 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:51,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:51,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-01 01:11:51,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:51,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:51,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:51,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:51,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:52,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:52,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:52,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:52,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:52,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:52,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 01:11:52,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 01:11:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 01:11:52,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:52,210 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-01 01:11:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:53,577 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-01 01:11:53,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 01:11:53,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-01 01:11:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:53,578 INFO L225 Difference]: With dead ends: 50 [2018-10-01 01:11:53,578 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:11:53,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:11:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 01:11:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-01 01:11:53,583 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-01 01:11:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:53,583 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-01 01:11:53,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 01:11:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-01 01:11:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 01:11:53,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:53,584 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-01 01:11:53,584 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:53,584 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:53,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-01 01:11:53,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:53,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:53,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:53,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:53,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:54,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:54,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:54,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:54,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:54,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:54,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:54,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:54,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 01:11:54,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 01:11:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 01:11:54,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:54,324 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-01 01:11:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:54,722 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-01 01:11:54,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 01:11:54,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-01 01:11:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:54,723 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:11:54,723 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:11:54,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:11:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:11:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 01:11:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 01:11:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-01 01:11:54,726 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-01 01:11:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:54,726 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-01 01:11:54,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 01:11:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-01 01:11:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 01:11:54,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:54,726 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-01 01:11:54,727 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:54,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-01 01:11:54,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:54,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:54,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:54,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:54,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:54,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:54,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:54,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:54,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 01:11:54,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:54,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:54,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:54,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 01:11:54,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 01:11:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 01:11:54,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:54,994 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-01 01:11:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:55,194 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-01 01:11:55,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 01:11:55,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-01 01:11:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:55,195 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:11:55,195 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 01:11:55,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 01:11:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-01 01:11:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:11:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-01 01:11:55,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-01 01:11:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:55,199 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-01 01:11:55,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 01:11:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-01 01:11:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-01 01:11:55,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:55,199 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-01 01:11:55,200 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:55,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:55,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-01 01:11:55,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:55,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:55,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:55,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:55,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:55,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:55,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:55,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:55,555 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:55,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:55,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:55,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:55,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 01:11:55,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 01:11:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 01:11:55,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:55,764 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-01 01:11:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:57,333 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-01 01:11:57,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 01:11:57,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-01 01:11:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:57,334 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:11:57,334 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 01:11:57,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:11:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 01:11:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-01 01:11:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:11:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-01 01:11:57,339 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-01 01:11:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:57,339 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-01 01:11:57,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 01:11:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-01 01:11:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 01:11:57,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:57,339 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-01 01:11:57,340 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:57,340 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-01 01:11:57,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:57,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:57,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:57,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:57,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:57,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:57,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:57,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:57,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 01:11:57,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:57,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:57,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:57,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 01:11:57,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 01:11:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 01:11:57,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:57,573 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-01 01:11:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:58,012 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-01 01:11:58,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 01:11:58,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-01 01:11:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:58,014 INFO L225 Difference]: With dead ends: 54 [2018-10-01 01:11:58,014 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:11:58,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:11:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 01:11:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 01:11:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-01 01:11:58,018 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-01 01:11:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:58,018 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-01 01:11:58,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 01:11:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-01 01:11:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 01:11:58,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:58,019 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-01 01:11:58,019 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:58,019 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:58,019 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-01 01:11:58,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:58,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:58,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:58,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:58,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:58,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:58,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:58,194 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:58,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 01:11:58,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:58,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:58,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:58,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 01:11:58,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 01:11:58,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 01:11:58,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:58,309 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-01 01:11:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:58,511 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-01 01:11:58,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 01:11:58,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-01 01:11:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:58,512 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:11:58,512 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 01:11:58,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 01:11:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-01 01:11:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:11:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-01 01:11:58,516 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-01 01:11:58,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:58,516 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-01 01:11:58,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 01:11:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-01 01:11:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-01 01:11:58,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:58,517 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-01 01:11:58,517 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:58,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-01 01:11:58,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:58,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:58,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:58,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:58,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:58,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:58,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:11:58,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:58,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:59,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:59,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 01:11:59,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 01:11:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 01:11:59,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:59,137 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-01 01:12:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:01,021 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-01 01:12:01,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 01:12:01,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-01 01:12:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:01,023 INFO L225 Difference]: With dead ends: 56 [2018-10-01 01:12:01,023 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:01,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:12:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 01:12:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:12:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-01 01:12:01,027 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-01 01:12:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:01,028 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-01 01:12:01,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 01:12:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-01 01:12:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 01:12:01,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:01,028 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-01 01:12:01,029 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:01,029 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-01 01:12:01,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:01,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:01,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:01,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:01,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:01,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:01,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:01,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:01,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:01,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:01,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:01,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:01,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 01:12:01,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 01:12:01,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 01:12:01,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:01,291 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-01 01:12:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:01,792 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-01 01:12:01,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 01:12:01,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-01 01:12:01,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:01,793 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:01,793 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:12:01,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:12:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 01:12:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 01:12:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-01 01:12:01,797 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-01 01:12:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:01,797 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-01 01:12:01,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 01:12:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-01 01:12:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 01:12:01,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:01,798 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-01 01:12:01,798 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:01,798 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-01 01:12:01,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:01,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:01,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:01,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:01,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:01,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:01,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:01,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:01,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:12:01,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:01,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:02,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:02,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 01:12:02,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 01:12:02,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 01:12:02,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:02,062 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-01 01:12:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:02,277 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-01 01:12:02,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 01:12:02,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-01 01:12:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:02,278 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:12:02,278 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 01:12:02,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 01:12:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-01 01:12:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:12:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-01 01:12:02,282 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-01 01:12:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:02,282 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-01 01:12:02,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 01:12:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-01 01:12:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-01 01:12:02,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:02,283 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-01 01:12:02,283 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:02,283 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:02,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-01 01:12:02,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:02,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:02,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:02,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:02,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:02,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:02,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:02,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:02,653 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:02,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:02,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:02,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:02,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 01:12:02,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 01:12:02,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 01:12:02,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:02,748 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-01 01:12:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:05,186 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-01 01:12:05,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 01:12:05,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-01 01:12:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:05,187 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:12:05,187 INFO L226 Difference]: Without dead ends: 56 [2018-10-01 01:12:05,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:12:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-01 01:12:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-01 01:12:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 01:12:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-01 01:12:05,191 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-01 01:12:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:05,191 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-01 01:12:05,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 01:12:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-01 01:12:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 01:12:05,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:05,192 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-01 01:12:05,192 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:05,192 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-01 01:12:05,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:05,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:05,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:05,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:05,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:05,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:05,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:05,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:05,900 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:12:05,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:05,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:06,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:06,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 01:12:06,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 01:12:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 01:12:06,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:06,416 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-01 01:12:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:06,890 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-01 01:12:06,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 01:12:06,890 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-01 01:12:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:06,891 INFO L225 Difference]: With dead ends: 60 [2018-10-01 01:12:06,891 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:12:06,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:12:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:12:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 01:12:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 01:12:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-01 01:12:06,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-01 01:12:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:06,895 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-01 01:12:06,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 01:12:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-01 01:12:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 01:12:06,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:06,896 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-01 01:12:06,896 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:06,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-01 01:12:06,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:06,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:06,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:06,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:06,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:07,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:07,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:07,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:07,156 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:12:07,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:07,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:07,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:07,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 01:12:07,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 01:12:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 01:12:07,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:07,248 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-01 01:12:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:07,476 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-01 01:12:07,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 01:12:07,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-01 01:12:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:07,478 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:12:07,478 INFO L226 Difference]: Without dead ends: 40 [2018-10-01 01:12:07,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:12:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-01 01:12:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-01 01:12:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 01:12:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-01 01:12:07,482 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-01 01:12:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:07,482 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-01 01:12:07,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 01:12:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-01 01:12:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-01 01:12:07,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:07,483 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-01 01:12:07,483 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:07,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:07,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-01 01:12:07,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:07,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:07,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:07,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:07,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:07,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:07,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:07,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:07,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:07,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:07,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 01:12:07,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 01:12:07,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 01:12:07,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:07,940 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-01 01:12:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:10,371 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-01 01:12:10,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 01:12:10,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-01 01:12:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:10,372 INFO L225 Difference]: With dead ends: 62 [2018-10-01 01:12:10,372 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:12:10,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:12:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:12:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-01 01:12:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 01:12:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-01 01:12:10,377 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-01 01:12:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:10,377 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-01 01:12:10,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 01:12:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-01 01:12:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 01:12:10,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:10,378 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-01 01:12:10,378 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:10,378 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:10,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-01 01:12:10,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:10,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:10,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:10,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:10,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:10,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:10,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:10,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:10,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:10,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:10,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:10,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:10,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 01:12:10,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 01:12:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 01:12:10,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:10,770 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-01 01:12:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:11,330 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-01 01:12:11,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 01:12:11,331 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-01 01:12:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:11,332 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:12:11,332 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:12:11,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:12:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:12:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 01:12:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 01:12:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-01 01:12:11,336 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-01 01:12:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:11,336 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-01 01:12:11,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 01:12:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-01 01:12:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 01:12:11,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:11,337 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-01 01:12:11,337 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:11,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-01 01:12:11,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:11,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:11,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:11,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:11,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:11,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:11,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:11,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:11,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 01:12:11,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:11,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:11,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:11,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 01:12:11,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 01:12:11,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 01:12:11,946 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:11,946 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-01 01:12:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:12,233 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-01 01:12:12,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 01:12:12,234 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-01 01:12:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:12,234 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:12:12,235 INFO L226 Difference]: Without dead ends: 42 [2018-10-01 01:12:12,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:12:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-01 01:12:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-01 01:12:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 01:12:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-01 01:12:12,238 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-01 01:12:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:12,239 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-01 01:12:12,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 01:12:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-01 01:12:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-01 01:12:12,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:12,239 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-01 01:12:12,240 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:12,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-01 01:12:12,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:12,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:12,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:12,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:12,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:12,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:12,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:12,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:12,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:12,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:12,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:12,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:12,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 01:12:12,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 01:12:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 01:12:12,860 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:12,861 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-01 01:12:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:15,471 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-01 01:12:15,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 01:12:15,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-01 01:12:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:15,473 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:12:15,473 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 01:12:15,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:12:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 01:12:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-01 01:12:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-01 01:12:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-01 01:12:15,477 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-01 01:12:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:15,477 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-01 01:12:15,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 01:12:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-01 01:12:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 01:12:15,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:15,477 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-01 01:12:15,478 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:15,478 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:15,478 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-01 01:12:15,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:15,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:15,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:15,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:15,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:15,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:15,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:15,675 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:15,706 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-01 01:12:15,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:15,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:15,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:15,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 01:12:15,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 01:12:15,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 01:12:15,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:15,795 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-01 01:12:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:16,421 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-01 01:12:16,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 01:12:16,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-01 01:12:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:16,422 INFO L225 Difference]: With dead ends: 66 [2018-10-01 01:12:16,422 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:12:16,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:12:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:12:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 01:12:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 01:12:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-01 01:12:16,426 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-01 01:12:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:16,426 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-01 01:12:16,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 01:12:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-01 01:12:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 01:12:16,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:16,427 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-01 01:12:16,427 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:16,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-01 01:12:16,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:16,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:16,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:17,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:17,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:17,177 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:17,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-01 01:12:17,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:17,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:17,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:17,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 01:12:17,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 01:12:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 01:12:17,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:17,429 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-01 01:12:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:17,715 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-01 01:12:17,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 01:12:17,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-01 01:12:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:17,716 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:12:17,716 INFO L226 Difference]: Without dead ends: 44 [2018-10-01 01:12:17,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:12:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-01 01:12:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-01 01:12:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-01 01:12:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-01 01:12:17,720 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-01 01:12:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:17,720 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-01 01:12:17,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 01:12:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-01 01:12:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-01 01:12:17,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:17,721 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-01 01:12:17,721 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:17,721 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-01 01:12:17,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:17,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:17,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:17,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:17,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:18,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:18,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:18,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:18,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:18,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:18,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 01:12:18,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 01:12:18,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 01:12:18,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:18,364 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-01 01:12:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:21,285 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-01 01:12:21,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 01:12:21,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-01 01:12:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:21,286 INFO L225 Difference]: With dead ends: 68 [2018-10-01 01:12:21,286 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:12:21,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:12:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:12:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-01 01:12:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-01 01:12:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-01 01:12:21,289 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-01 01:12:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:21,290 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-01 01:12:21,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 01:12:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-01 01:12:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 01:12:21,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:21,290 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-01 01:12:21,290 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:21,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-01 01:12:21,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:21,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:21,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:21,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:21,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:21,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:21,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:21,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:21,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:21,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:21,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 01:12:21,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 01:12:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 01:12:21,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:21,602 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-01 01:12:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:22,281 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-01 01:12:22,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 01:12:22,282 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-01 01:12:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:22,283 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:12:22,283 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:12:22,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:12:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:12:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 01:12:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 01:12:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-01 01:12:22,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-01 01:12:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:22,288 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-01 01:12:22,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 01:12:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-01 01:12:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 01:12:22,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:22,288 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-01 01:12:22,288 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:22,289 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:22,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-01 01:12:22,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:22,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:22,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:22,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:22,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:22,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:22,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:22,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:22,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-01 01:12:22,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:22,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:22,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:22,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 01:12:22,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 01:12:22,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 01:12:22,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:22,712 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-01 01:12:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:23,040 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-01 01:12:23,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 01:12:23,040 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-01 01:12:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:23,041 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:12:23,041 INFO L226 Difference]: Without dead ends: 46 [2018-10-01 01:12:23,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:12:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-01 01:12:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-01 01:12:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-01 01:12:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-01 01:12:23,045 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-01 01:12:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:23,045 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-01 01:12:23,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 01:12:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-01 01:12:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-01 01:12:23,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:23,046 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-01 01:12:23,046 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:23,046 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-01 01:12:23,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:23,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:23,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:23,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:23,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:23,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:23,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:23,533 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:23,561 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:23,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:23,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:23,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:23,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 01:12:23,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 01:12:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 01:12:23,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:23,664 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-01 01:12:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:26,878 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-01 01:12:26,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 01:12:26,879 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-01 01:12:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:26,880 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:12:26,880 INFO L226 Difference]: Without dead ends: 68 [2018-10-01 01:12:26,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:12:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-01 01:12:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-01 01:12:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-01 01:12:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-01 01:12:26,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-01 01:12:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:26,885 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-01 01:12:26,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 01:12:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-01 01:12:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 01:12:26,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:26,886 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-01 01:12:26,886 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:26,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-01 01:12:26,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:26,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:26,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:26,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:26,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:27,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:27,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:27,230 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:27,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-01 01:12:27,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:27,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:27,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:27,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 01:12:27,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 01:12:27,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 01:12:27,495 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:27,495 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-01 01:12:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:28,149 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-01 01:12:28,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 01:12:28,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-01 01:12:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:28,150 INFO L225 Difference]: With dead ends: 72 [2018-10-01 01:12:28,150 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:12:28,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:12:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:12:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-01 01:12:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 01:12:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-01 01:12:28,155 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-01 01:12:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:28,155 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-01 01:12:28,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 01:12:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-01 01:12:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 01:12:28,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:28,156 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-01 01:12:28,156 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:28,156 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:28,156 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-01 01:12:28,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:28,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:28,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:28,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:28,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:28,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:28,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:28,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:28,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-01 01:12:28,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:28,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:29,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:29,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 01:12:29,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 01:12:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 01:12:29,135 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:29,135 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-01 01:12:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:29,442 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-01 01:12:29,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 01:12:29,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-01 01:12:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:29,444 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:12:29,444 INFO L226 Difference]: Without dead ends: 48 [2018-10-01 01:12:29,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:12:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-01 01:12:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-01 01:12:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-01 01:12:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-01 01:12:29,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-01 01:12:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:29,447 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-01 01:12:29,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 01:12:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-01 01:12:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-01 01:12:29,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:29,448 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-01 01:12:29,448 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:29,448 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-01 01:12:29,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:29,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:29,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:29,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:29,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:29,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:29,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:29,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:30,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:30,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:30,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 01:12:30,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 01:12:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 01:12:30,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:30,182 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-01 01:12:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:33,512 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-01 01:12:33,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 01:12:33,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-01 01:12:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:33,514 INFO L225 Difference]: With dead ends: 74 [2018-10-01 01:12:33,514 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:12:33,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:12:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:12:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-01 01:12:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-01 01:12:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-01 01:12:33,518 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-01 01:12:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:33,518 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-01 01:12:33,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 01:12:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-01 01:12:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 01:12:33,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:33,519 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-01 01:12:33,519 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:33,519 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-01 01:12:33,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:33,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:33,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:33,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:33,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:33,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:33,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:33,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:33,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:33,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:33,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:33,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:33,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 01:12:33,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 01:12:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 01:12:33,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:33,832 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-01 01:12:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:34,687 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-01 01:12:34,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 01:12:34,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-01 01:12:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:34,689 INFO L225 Difference]: With dead ends: 75 [2018-10-01 01:12:34,689 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:12:34,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:12:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:12:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 01:12:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 01:12:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-01 01:12:34,693 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-01 01:12:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:34,693 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-01 01:12:34,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 01:12:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-01 01:12:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 01:12:34,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:34,694 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-01 01:12:34,694 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:34,694 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-01 01:12:34,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:34,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:34,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:35,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:35,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:35,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:35,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 01:12:35,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:35,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:35,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:35,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 01:12:35,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 01:12:35,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 01:12:35,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:35,855 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-01 01:12:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:36,176 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-01 01:12:36,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 01:12:36,176 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-01 01:12:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:36,177 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:12:36,177 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 01:12:36,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:12:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 01:12:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-01 01:12:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-01 01:12:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-01 01:12:36,182 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-01 01:12:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:36,182 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-01 01:12:36,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 01:12:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-01 01:12:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-01 01:12:36,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:36,182 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-01 01:12:36,182 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:36,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-01 01:12:36,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:36,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:36,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:36,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:36,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:36,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:36,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:36,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:36,625 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:36,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:36,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:36,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:36,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 01:12:36,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 01:12:36,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 01:12:36,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:36,740 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-01 01:12:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:40,489 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-01 01:12:40,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 01:12:40,490 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-01 01:12:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:40,490 INFO L225 Difference]: With dead ends: 77 [2018-10-01 01:12:40,491 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 01:12:40,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:12:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 01:12:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-01 01:12:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 01:12:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-01 01:12:40,495 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-01 01:12:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:40,495 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-01 01:12:40,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 01:12:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-01 01:12:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 01:12:40,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:40,495 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-01 01:12:40,495 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:40,496 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:40,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-01 01:12:40,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:40,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:40,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:40,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:40,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:40,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:40,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:40,640 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:40,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-01 01:12:40,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:40,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:40,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:40,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 01:12:40,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 01:12:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 01:12:40,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:40,794 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-01 01:12:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:41,619 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-01 01:12:41,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 01:12:41,620 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-01 01:12:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:41,620 INFO L225 Difference]: With dead ends: 78 [2018-10-01 01:12:41,620 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:12:41,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:12:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:12:41,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 01:12:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 01:12:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-01 01:12:41,625 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-01 01:12:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:41,625 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-01 01:12:41,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 01:12:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-01 01:12:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 01:12:41,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:41,626 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-01 01:12:41,626 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:41,626 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-01 01:12:41,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:41,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:41,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:41,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:41,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:41,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:41,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:41,935 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:41,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 01:12:41,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:41,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:42,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:42,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 01:12:42,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 01:12:42,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 01:12:42,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:42,078 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-01 01:12:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:42,533 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-01 01:12:42,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 01:12:42,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-01 01:12:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:42,534 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:12:42,534 INFO L226 Difference]: Without dead ends: 52 [2018-10-01 01:12:42,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:12:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-01 01:12:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-01 01:12:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 01:12:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-01 01:12:42,538 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-01 01:12:42,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:42,538 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-01 01:12:42,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 01:12:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-01 01:12:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-01 01:12:42,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:42,539 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-01 01:12:42,539 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:42,539 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-01 01:12:42,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:42,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:42,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:42,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:42,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:43,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:43,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:43,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:43,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:43,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:43,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 01:12:43,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 01:12:43,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 01:12:43,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:43,348 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-01 01:12:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:47,414 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-01 01:12:47,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 01:12:47,414 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-01 01:12:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:47,415 INFO L225 Difference]: With dead ends: 80 [2018-10-01 01:12:47,415 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 01:12:47,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:12:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 01:12:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-01 01:12:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-01 01:12:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-01 01:12:47,419 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-01 01:12:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:47,420 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-01 01:12:47,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 01:12:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-01 01:12:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 01:12:47,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:47,420 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-01 01:12:47,420 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:47,420 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-01 01:12:47,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:47,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:47,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:47,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:47,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:47,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:47,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:47,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:12:47,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:12:47,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:47,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:47,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:47,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-01 01:12:47,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 01:12:47,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 01:12:47,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:47,762 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-01 01:12:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:48,746 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-01 01:12:48,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 01:12:48,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-01 01:12:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:48,747 INFO L225 Difference]: With dead ends: 81 [2018-10-01 01:12:48,747 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:12:48,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:12:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:12:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 01:12:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 01:12:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-01 01:12:48,751 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-01 01:12:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:48,751 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-01 01:12:48,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 01:12:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-01 01:12:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 01:12:48,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:48,752 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-01 01:12:48,752 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:48,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-01 01:12:48,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:48,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:48,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:48,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:48,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:49,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:49,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:49,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:12:49,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-01 01:12:49,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:49,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:49,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:49,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-01 01:12:49,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 01:12:49,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 01:12:49,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:49,332 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-01 01:12:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:49,648 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-01 01:12:49,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 01:12:49,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-01 01:12:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:49,650 INFO L225 Difference]: With dead ends: 57 [2018-10-01 01:12:49,650 INFO L226 Difference]: Without dead ends: 54 [2018-10-01 01:12:49,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:12:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-01 01:12:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-01 01:12:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-01 01:12:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-01 01:12:49,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-01 01:12:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:49,654 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-01 01:12:49,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 01:12:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-01 01:12:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-01 01:12:49,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:49,654 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-01 01:12:49,654 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:49,654 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:49,655 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-01 01:12:49,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:49,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:49,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:49,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:49,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:50,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:50,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:50,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:12:50,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:12:50,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:50,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:50,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:50,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 01:12:50,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 01:12:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 01:12:50,336 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:50,336 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-01 01:12:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:54,678 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-01 01:12:54,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 01:12:54,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-01 01:12:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:54,680 INFO L225 Difference]: With dead ends: 83 [2018-10-01 01:12:54,680 INFO L226 Difference]: Without dead ends: 80 [2018-10-01 01:12:54,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:12:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-01 01:12:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-01 01:12:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 01:12:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-01 01:12:54,684 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-01 01:12:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:54,684 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-01 01:12:54,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 01:12:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-01 01:12:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 01:12:54,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:54,685 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-01 01:12:54,685 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:54,686 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:54,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-01 01:12:54,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:54,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:54,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:54,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:54,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:56,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:56,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:56,698 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:12:56,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-01 01:12:56,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:56,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:57,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:57,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-01 01:12:57,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 01:12:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 01:12:57,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:57,049 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-01 01:12:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:58,086 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-01 01:12:58,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 01:12:58,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-01 01:12:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:58,088 INFO L225 Difference]: With dead ends: 84 [2018-10-01 01:12:58,088 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 01:12:58,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-10-01 01:12:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 01:12:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-01 01:12:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-01 01:12:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-01 01:12:58,093 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-01 01:12:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:58,093 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-01 01:12:58,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 01:12:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-01 01:12:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 01:12:58,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:58,094 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-01 01:12:58,094 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:58,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-01 01:12:58,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:58,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:58,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:58,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:58,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:58,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:58,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:58,314 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:12:58,350 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-01 01:12:58,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:12:58,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:58,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:58,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-01 01:12:58,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 01:12:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 01:12:58,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:58,612 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-01 01:12:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:12:59,005 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-01 01:12:59,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 01:12:59,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-01 01:12:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:12:59,006 INFO L225 Difference]: With dead ends: 59 [2018-10-01 01:12:59,006 INFO L226 Difference]: Without dead ends: 56 [2018-10-01 01:12:59,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:12:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-01 01:12:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-01 01:12:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 01:12:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-01 01:12:59,011 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-01 01:12:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:12:59,012 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-01 01:12:59,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 01:12:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-01 01:12:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-01 01:12:59,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:12:59,012 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-01 01:12:59,012 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:12:59,013 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:12:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-01 01:12:59,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:12:59,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:12:59,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:59,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:12:59,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:12:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:59,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:12:59,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:12:59,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:12:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:12:59,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:12:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:12:59,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:12:59,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-01 01:12:59,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 01:12:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 01:12:59,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:12:59,732 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-01 01:13:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:04,475 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-01 01:13:04,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 01:13:04,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-01 01:13:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:04,477 INFO L225 Difference]: With dead ends: 86 [2018-10-01 01:13:04,477 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 01:13:04,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:13:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 01:13:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-01 01:13:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-01 01:13:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-01 01:13:04,482 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-01 01:13:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:04,482 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-01 01:13:04,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 01:13:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-01 01:13:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 01:13:04,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:04,483 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-01 01:13:04,483 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:04,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-01 01:13:04,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:04,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:04,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:04,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:04,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:05,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:05,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:05,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:05,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:05,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:05,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:06,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:06,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-01 01:13:06,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 01:13:06,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 01:13:06,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:06,600 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-01 01:13:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:07,741 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-01 01:13:07,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 01:13:07,741 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-01 01:13:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:07,742 INFO L225 Difference]: With dead ends: 87 [2018-10-01 01:13:07,742 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 01:13:07,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 01:13:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 01:13:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-01 01:13:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 01:13:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-01 01:13:07,750 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-01 01:13:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:07,750 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-01 01:13:07,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 01:13:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-01 01:13:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 01:13:07,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:07,750 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-01 01:13:07,751 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:07,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:07,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-01 01:13:07,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:07,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:07,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:07,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:07,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:07,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:07,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:07,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:08,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-01 01:13:08,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:08,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:08,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:08,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-01 01:13:08,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 01:13:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 01:13:08,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:08,142 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-01 01:13:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:09,286 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-01 01:13:09,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 01:13:09,286 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-01 01:13:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:09,287 INFO L225 Difference]: With dead ends: 61 [2018-10-01 01:13:09,287 INFO L226 Difference]: Without dead ends: 58 [2018-10-01 01:13:09,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:13:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-01 01:13:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-01 01:13:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-01 01:13:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-01 01:13:09,291 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-01 01:13:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:09,292 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-01 01:13:09,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 01:13:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-01 01:13:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-01 01:13:09,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:09,292 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-01 01:13:09,292 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:09,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-01 01:13:09,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:09,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:09,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:09,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:09,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:10,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:10,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:10,998 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:11,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:11,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:11,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:11,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:11,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-01 01:13:11,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 01:13:11,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 01:13:11,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:11,262 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-01 01:13:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:16,340 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-01 01:13:16,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 01:13:16,340 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-01 01:13:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:16,341 INFO L225 Difference]: With dead ends: 89 [2018-10-01 01:13:16,341 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 01:13:16,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 01:13:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 01:13:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-01 01:13:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-01 01:13:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-01 01:13:16,347 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-01 01:13:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:16,347 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-01 01:13:16,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 01:13:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-01 01:13:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 01:13:16,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:16,348 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-01 01:13:16,348 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:16,348 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-01 01:13:16,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:16,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:16,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:16,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:16,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:16,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:16,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:16,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:16,569 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-01 01:13:16,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:16,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:16,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:16,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-01 01:13:16,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 01:13:16,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 01:13:16,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:16,695 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-01 01:13:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:17,509 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-01 01:13:17,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 01:13:17,509 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-01 01:13:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:17,510 INFO L225 Difference]: With dead ends: 90 [2018-10-01 01:13:17,510 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 01:13:17,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:13:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 01:13:17,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-01 01:13:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 01:13:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-01 01:13:17,516 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-01 01:13:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:17,516 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-01 01:13:17,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 01:13:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-01 01:13:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 01:13:17,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:17,517 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-01 01:13:17,517 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:17,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-01 01:13:17,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:17,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:17,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:17,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:17,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:18,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:18,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:18,710 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:18,747 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-01 01:13:18,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:18,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:18,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:18,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-01 01:13:18,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 01:13:18,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 01:13:18,870 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:18,870 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-01 01:13:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:19,233 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-01 01:13:19,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 01:13:19,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-01 01:13:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:19,234 INFO L225 Difference]: With dead ends: 63 [2018-10-01 01:13:19,234 INFO L226 Difference]: Without dead ends: 60 [2018-10-01 01:13:19,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 01:13:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-01 01:13:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-01 01:13:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-01 01:13:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-01 01:13:19,240 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-01 01:13:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:19,240 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-01 01:13:19,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 01:13:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-01 01:13:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-01 01:13:19,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:19,241 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-01 01:13:19,241 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:19,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-01 01:13:19,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:19,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:19,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:19,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:19,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:20,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:20,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:20,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:20,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:20,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:20,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-01 01:13:20,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 01:13:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 01:13:20,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:20,904 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-01 01:13:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:26,645 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-01 01:13:26,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 01:13:26,646 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-01 01:13:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:26,647 INFO L225 Difference]: With dead ends: 92 [2018-10-01 01:13:26,647 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 01:13:26,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 01:13:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 01:13:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-01 01:13:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 01:13:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-01 01:13:26,651 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-01 01:13:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:26,651 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-01 01:13:26,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 01:13:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-01 01:13:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 01:13:26,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:26,652 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-01 01:13:26,652 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:26,652 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-01 01:13:26,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:26,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:26,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:26,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:26,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:26,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:26,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:26,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:27,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:27,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:27,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:27,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:27,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-01 01:13:27,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 01:13:27,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 01:13:27,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:27,198 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-01 01:13:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:28,571 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-01 01:13:28,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 01:13:28,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-01 01:13:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:28,572 INFO L225 Difference]: With dead ends: 93 [2018-10-01 01:13:28,572 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 01:13:28,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:13:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 01:13:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 01:13:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 01:13:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-01 01:13:28,577 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-01 01:13:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:28,578 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-01 01:13:28,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 01:13:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-01 01:13:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 01:13:28,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:28,579 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-01 01:13:28,579 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:28,579 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:28,579 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-01 01:13:28,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:28,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:28,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:28,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:28,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:29,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:29,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:29,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:29,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 01:13:29,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:29,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:29,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:29,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-01 01:13:29,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 01:13:29,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 01:13:29,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:29,438 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-01 01:13:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:29,913 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-01 01:13:29,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 01:13:29,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-01 01:13:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:29,914 INFO L225 Difference]: With dead ends: 65 [2018-10-01 01:13:29,914 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 01:13:29,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:13:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 01:13:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-01 01:13:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 01:13:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-01 01:13:29,921 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-01 01:13:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:29,922 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-01 01:13:29,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 01:13:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-01 01:13:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-01 01:13:29,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:29,923 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-01 01:13:29,923 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:29,923 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-01 01:13:29,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:29,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:29,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:29,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:29,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:30,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:30,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:30,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:30,601 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:30,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:30,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:30,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:30,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-01 01:13:30,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 01:13:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 01:13:30,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:30,781 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-01 01:13:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:36,664 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-01 01:13:36,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 01:13:36,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-01 01:13:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:36,666 INFO L225 Difference]: With dead ends: 95 [2018-10-01 01:13:36,666 INFO L226 Difference]: Without dead ends: 92 [2018-10-01 01:13:36,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:13:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-01 01:13:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-01 01:13:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-01 01:13:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-01 01:13:36,672 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-01 01:13:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:36,672 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-01 01:13:36,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 01:13:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-01 01:13:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 01:13:36,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:36,673 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-01 01:13:36,673 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:36,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-01 01:13:36,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:36,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:36,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:36,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:36,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:37,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:37,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:37,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:37,527 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 01:13:37,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:37,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:37,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:37,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-01 01:13:37,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 01:13:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 01:13:37,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:37,698 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-01 01:13:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:38,593 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-01 01:13:38,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 01:13:38,593 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-01 01:13:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:38,594 INFO L225 Difference]: With dead ends: 96 [2018-10-01 01:13:38,594 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 01:13:38,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:13:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 01:13:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-01 01:13:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-01 01:13:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-01 01:13:38,599 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-01 01:13:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:38,599 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-01 01:13:38,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 01:13:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-01 01:13:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 01:13:38,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:38,600 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-01 01:13:38,600 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:38,600 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:38,600 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-01 01:13:38,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:38,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:38,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:38,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:38,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:39,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:39,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:39,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:39,309 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-01 01:13:39,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:39,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:39,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:39,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-01 01:13:39,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 01:13:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 01:13:39,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:39,425 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-01 01:13:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:39,803 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-01 01:13:39,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 01:13:39,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-01 01:13:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:39,804 INFO L225 Difference]: With dead ends: 67 [2018-10-01 01:13:39,805 INFO L226 Difference]: Without dead ends: 64 [2018-10-01 01:13:39,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:13:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-01 01:13:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-01 01:13:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-01 01:13:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-01 01:13:39,810 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-01 01:13:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:39,810 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-01 01:13:39,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 01:13:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-01 01:13:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-01 01:13:39,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:39,811 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-01 01:13:39,811 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:39,811 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:39,811 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-01 01:13:39,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:39,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:39,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:39,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:39,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:40,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:40,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:40,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:40,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:40,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:40,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-01 01:13:40,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 01:13:40,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 01:13:40,670 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:40,670 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-01 01:13:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:47,082 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-01 01:13:47,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 01:13:47,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-01 01:13:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:47,083 INFO L225 Difference]: With dead ends: 98 [2018-10-01 01:13:47,083 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 01:13:47,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:13:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 01:13:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-01 01:13:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-01 01:13:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-01 01:13:47,088 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-01 01:13:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:47,088 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-01 01:13:47,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 01:13:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-01 01:13:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 01:13:47,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:47,089 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-01 01:13:47,089 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:47,089 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-01 01:13:47,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:47,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:47,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:47,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:47,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:47,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:47,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:47,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:47,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:47,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:47,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-01 01:13:47,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 01:13:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 01:13:47,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:47,727 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-01 01:13:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:49,270 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-01 01:13:49,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 01:13:49,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-01 01:13:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:49,271 INFO L225 Difference]: With dead ends: 99 [2018-10-01 01:13:49,271 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 01:13:49,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:13:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 01:13:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-01 01:13:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-01 01:13:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-01 01:13:49,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-01 01:13:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:49,277 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-01 01:13:49,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 01:13:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-01 01:13:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 01:13:49,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:49,278 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-01 01:13:49,278 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:49,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:49,278 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-01 01:13:49,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:49,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:49,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:49,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:49,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:49,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:49,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:49,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:13:49,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-01 01:13:49,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:49,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:49,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:49,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-01 01:13:49,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 01:13:49,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 01:13:49,747 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:49,747 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-01 01:13:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:50,149 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-01 01:13:50,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 01:13:50,150 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-01 01:13:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:50,150 INFO L225 Difference]: With dead ends: 69 [2018-10-01 01:13:50,151 INFO L226 Difference]: Without dead ends: 66 [2018-10-01 01:13:50,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:13:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-01 01:13:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-01 01:13:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-01 01:13:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-01 01:13:50,156 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-01 01:13:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:50,156 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-01 01:13:50,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 01:13:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-01 01:13:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-01 01:13:50,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:50,156 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-01 01:13:50,156 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:50,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-01 01:13:50,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:50,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:50,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:50,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:50,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:50,859 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:13:50,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:13:50,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:50,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:51,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:51,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-01 01:13:51,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 01:13:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 01:13:51,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:51,044 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-01 01:13:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:57,817 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-01 01:13:57,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 01:13:57,818 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-01 01:13:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:57,819 INFO L225 Difference]: With dead ends: 101 [2018-10-01 01:13:57,819 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 01:13:57,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:13:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 01:13:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-01 01:13:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-01 01:13:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-01 01:13:57,824 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-01 01:13:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:57,824 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-01 01:13:57,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 01:13:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-01 01:13:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 01:13:57,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:57,825 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-01 01:13:57,825 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:57,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-01 01:13:57,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:57,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:57,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:57,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:57,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:58,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:58,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:13:58,082 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:58,130 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-01 01:13:58,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:58,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:58,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:58,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-01 01:13:58,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 01:13:58,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 01:13:58,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:58,422 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-01 01:14:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:00,090 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-01 01:14:00,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 01:14:00,091 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-01 01:14:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:00,091 INFO L225 Difference]: With dead ends: 102 [2018-10-01 01:14:00,092 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 01:14:00,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:14:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 01:14:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-01 01:14:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-01 01:14:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-01 01:14:00,097 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-01 01:14:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:00,097 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-01 01:14:00,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 01:14:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-01 01:14:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 01:14:00,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:00,098 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-01 01:14:00,098 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:00,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:00,098 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-01 01:14:00,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:00,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:00,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:00,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:00,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:00,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:00,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:14:00,350 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:00,399 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-01 01:14:00,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:00,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:00,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:00,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-01 01:14:00,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 01:14:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 01:14:00,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:00,549 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-01 01:14:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:00,950 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-01 01:14:00,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 01:14:00,951 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-01 01:14:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:00,951 INFO L225 Difference]: With dead ends: 71 [2018-10-01 01:14:00,952 INFO L226 Difference]: Without dead ends: 68 [2018-10-01 01:14:00,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:14:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-01 01:14:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-01 01:14:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-01 01:14:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-01 01:14:00,956 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-01 01:14:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:00,957 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-01 01:14:00,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 01:14:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-01 01:14:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-01 01:14:00,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:00,957 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-01 01:14:00,957 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:00,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-01 01:14:00,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:00,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:00,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:00,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:00,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:01,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:01,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:14:01,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:01,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:02,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:02,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-01 01:14:02,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 01:14:02,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 01:14:02,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:02,180 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-01 01:14:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:09,236 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-01 01:14:09,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 01:14:09,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-01 01:14:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:09,238 INFO L225 Difference]: With dead ends: 104 [2018-10-01 01:14:09,238 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 01:14:09,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:14:09,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 01:14:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-01 01:14:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-01 01:14:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-01 01:14:09,243 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-01 01:14:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:09,244 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-01 01:14:09,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 01:14:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-01 01:14:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 01:14:09,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:09,244 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-01 01:14:09,245 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:09,245 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:09,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-01 01:14:09,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:09,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:09,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:09,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:09,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:09,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:09,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:14:09,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:09,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:09,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:09,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:10,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:10,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-01 01:14:10,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 01:14:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 01:14:10,088 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:10,088 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-01 01:14:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:12,025 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-01 01:14:12,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 01:14:12,026 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-01 01:14:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:12,027 INFO L225 Difference]: With dead ends: 105 [2018-10-01 01:14:12,027 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 01:14:12,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:14:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 01:14:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-01 01:14:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-01 01:14:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-01 01:14:12,032 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-01 01:14:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:12,033 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-01 01:14:12,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 01:14:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-01 01:14:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 01:14:12,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:12,033 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-01 01:14:12,034 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:12,034 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-01 01:14:12,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:12,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:12,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:12,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:12,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:12,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:12,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-01 01:14:12,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:12,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-01 01:14:12,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:12,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:12,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:12,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-01 01:14:12,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 01:14:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 01:14:12,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:12,804 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-01 01:14:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:13,218 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-01 01:14:13,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 01:14:13,219 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-01 01:14:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:13,220 INFO L225 Difference]: With dead ends: 73 [2018-10-01 01:14:13,220 INFO L226 Difference]: Without dead ends: 70 [2018-10-01 01:14:13,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:14:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-01 01:14:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-01 01:14:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-01 01:14:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-01 01:14:13,225 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-01 01:14:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:13,225 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-01 01:14:13,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 01:14:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-01 01:14:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-01 01:14:13,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:13,226 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-01 01:14:13,226 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:13,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:13,226 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-01 01:14:13,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:13,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:13,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:13,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:13,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:13,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:13,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:13,989 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:14,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:14,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:14,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:14,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:14,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-01 01:14:14,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 01:14:14,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 01:14:14,344 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:14,344 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-01 01:14:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:21,826 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-01 01:14:21,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 01:14:21,827 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-01 01:14:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:21,828 INFO L225 Difference]: With dead ends: 107 [2018-10-01 01:14:21,828 INFO L226 Difference]: Without dead ends: 104 [2018-10-01 01:14:21,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:14:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-01 01:14:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-01 01:14:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-01 01:14:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-01 01:14:21,834 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-01 01:14:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:21,834 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-01 01:14:21,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 01:14:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-01 01:14:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 01:14:21,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:21,835 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-01 01:14:21,835 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:21,835 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-01 01:14:21,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:21,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:21,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:21,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:21,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:22,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:22,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:22,058 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:14:22,110 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-01 01:14:22,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:22,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:22,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:22,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-01 01:14:22,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 01:14:22,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 01:14:22,257 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:22,257 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-01 01:14:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:24,055 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-01 01:14:24,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 01:14:24,055 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-01 01:14:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:24,056 INFO L225 Difference]: With dead ends: 108 [2018-10-01 01:14:24,056 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 01:14:24,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:14:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 01:14:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-01 01:14:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-01 01:14:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-01 01:14:24,061 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-01 01:14:24,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:24,061 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-01 01:14:24,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 01:14:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-01 01:14:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 01:14:24,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:24,062 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-01 01:14:24,062 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:24,062 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-01 01:14:24,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:24,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:24,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:24,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:24,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:24,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:24,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:24,486 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:24,536 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-01 01:14:24,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:24,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:24,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:24,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-01 01:14:24,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 01:14:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 01:14:24,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:24,698 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-01 01:14:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:25,128 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-01 01:14:25,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 01:14:25,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-01 01:14:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:25,129 INFO L225 Difference]: With dead ends: 75 [2018-10-01 01:14:25,129 INFO L226 Difference]: Without dead ends: 72 [2018-10-01 01:14:25,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:14:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-01 01:14:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-01 01:14:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-01 01:14:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-01 01:14:25,135 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-01 01:14:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:25,135 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-01 01:14:25,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 01:14:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-01 01:14:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-01 01:14:25,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:25,136 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-01 01:14:25,136 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:25,136 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-01 01:14:25,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:25,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:25,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:25,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:25,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:25,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:25,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:25,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:26,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:26,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:26,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-01 01:14:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 01:14:26,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 01:14:26,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:26,162 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-01 01:14:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:34,222 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-01 01:14:34,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 01:14:34,222 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-01 01:14:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:34,223 INFO L225 Difference]: With dead ends: 110 [2018-10-01 01:14:34,223 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 01:14:34,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 01:14:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 01:14:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-01 01:14:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-01 01:14:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-01 01:14:34,229 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-01 01:14:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:34,229 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-01 01:14:34,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 01:14:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-01 01:14:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 01:14:34,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:34,230 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-01 01:14:34,230 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:34,230 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-01 01:14:34,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:34,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:34,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:34,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:34,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:34,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:34,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:34,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:14:34,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:14:34,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:34,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:34,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:34,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-01 01:14:34,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 01:14:34,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 01:14:34,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:34,738 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-01 01:14:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:36,528 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-01 01:14:36,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 01:14:36,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-01 01:14:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:36,529 INFO L225 Difference]: With dead ends: 111 [2018-10-01 01:14:36,530 INFO L226 Difference]: Without dead ends: 73 [2018-10-01 01:14:36,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:14:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-01 01:14:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-01 01:14:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 01:14:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-01 01:14:36,533 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-01 01:14:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:36,534 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-01 01:14:36,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 01:14:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-01 01:14:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 01:14:36,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:36,534 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-01 01:14:36,534 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:36,535 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-01 01:14:36,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:36,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:36,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:36,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:36,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:36,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:36,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:36,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:37,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 01:14:37,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:37,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:37,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:37,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-01 01:14:37,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 01:14:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 01:14:37,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:37,144 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-01 01:14:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:37,584 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-01 01:14:37,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 01:14:37,585 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-01 01:14:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:37,585 INFO L225 Difference]: With dead ends: 77 [2018-10-01 01:14:37,586 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 01:14:37,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:14:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 01:14:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-01 01:14:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-01 01:14:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-01 01:14:37,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-01 01:14:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:37,591 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-01 01:14:37,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 01:14:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-01 01:14:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-01 01:14:37,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:37,592 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-01 01:14:37,592 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:37,592 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-01 01:14:37,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:37,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:37,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:37,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:37,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:38,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:38,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:38,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:38,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:38,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:38,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:38,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:38,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-01 01:14:38,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 01:14:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 01:14:38,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:38,876 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-01 01:14:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:47,304 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-01 01:14:47,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 01:14:47,305 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-01 01:14:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:47,305 INFO L225 Difference]: With dead ends: 113 [2018-10-01 01:14:47,306 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 01:14:47,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:14:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 01:14:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-01 01:14:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-01 01:14:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-01 01:14:47,312 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-01 01:14:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:47,312 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-01 01:14:47,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 01:14:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-01 01:14:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 01:14:47,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:47,312 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-01 01:14:47,313 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:47,313 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-01 01:14:47,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:47,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:47,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:47,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:47,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:47,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:47,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:47,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:14:47,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 01:14:47,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:47,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:48,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:48,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-01 01:14:48,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 01:14:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 01:14:48,114 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:48,115 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-01 01:14:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:50,172 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-01 01:14:50,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 01:14:50,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-01 01:14:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:50,174 INFO L225 Difference]: With dead ends: 114 [2018-10-01 01:14:50,174 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 01:14:50,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:14:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 01:14:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-01 01:14:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 01:14:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-01 01:14:50,180 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-01 01:14:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:50,180 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-01 01:14:50,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 01:14:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-01 01:14:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 01:14:50,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:50,181 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-01 01:14:50,181 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:50,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:50,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-01 01:14:50,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:50,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:50,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:50,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:50,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:50,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:50,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:50,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:14:50,528 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 01:14:50,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:50,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:50,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:50,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-01 01:14:50,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 01:14:50,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 01:14:50,677 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:50,678 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-01 01:14:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:51,218 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-01 01:14:51,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 01:14:51,218 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-01 01:14:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:51,219 INFO L225 Difference]: With dead ends: 79 [2018-10-01 01:14:51,219 INFO L226 Difference]: Without dead ends: 76 [2018-10-01 01:14:51,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:14:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-01 01:14:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-01 01:14:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-01 01:14:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-01 01:14:51,226 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-01 01:14:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:51,226 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-01 01:14:51,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 01:14:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-01 01:14:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-01 01:14:51,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:51,227 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-01 01:14:51,227 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:51,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-01 01:14:51,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:51,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:51,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:51,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:51,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:52,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:52,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:52,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:14:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:52,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:52,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:52,651 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-01 01:14:52,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 01:14:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 01:14:52,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:52,651 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-01 01:15:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:01,601 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-01 01:15:01,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 01:15:01,602 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-01 01:15:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:01,603 INFO L225 Difference]: With dead ends: 116 [2018-10-01 01:15:01,603 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 01:15:01,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 01:15:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 01:15:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-01 01:15:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-01 01:15:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-01 01:15:01,609 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-01 01:15:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:01,609 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-01 01:15:01,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 01:15:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-01 01:15:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 01:15:01,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:01,610 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-01 01:15:01,610 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:01,611 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-01 01:15:01,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:01,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:01,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:01,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:01,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:01,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:01,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:01,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:15:01,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:15:01,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:01,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:02,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:02,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-01 01:15:02,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 01:15:02,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 01:15:02,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:02,186 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-01 01:15:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:04,318 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-01 01:15:04,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 01:15:04,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-01 01:15:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:04,320 INFO L225 Difference]: With dead ends: 117 [2018-10-01 01:15:04,320 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 01:15:04,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:15:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 01:15:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 01:15:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 01:15:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-01 01:15:04,325 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-01 01:15:04,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:04,325 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-01 01:15:04,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 01:15:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-01 01:15:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 01:15:04,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:04,325 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-01 01:15:04,326 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:04,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:04,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-01 01:15:04,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:04,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:04,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:04,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:04,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:04,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:04,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:04,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:15:04,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-01 01:15:04,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:04,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:04,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:04,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-01 01:15:04,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 01:15:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 01:15:04,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:04,867 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-01 01:15:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:05,348 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-01 01:15:05,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 01:15:05,348 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-01 01:15:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:05,349 INFO L225 Difference]: With dead ends: 81 [2018-10-01 01:15:05,349 INFO L226 Difference]: Without dead ends: 78 [2018-10-01 01:15:05,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:15:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-01 01:15:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-01 01:15:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-01 01:15:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-01 01:15:05,355 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-01 01:15:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:05,355 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-01 01:15:05,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 01:15:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-01 01:15:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-01 01:15:05,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:05,356 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-01 01:15:05,356 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:05,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-01 01:15:05,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:05,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:05,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:05,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:05,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:06,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:06,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:06,696 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:15:06,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:15:06,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:06,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:06,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:06,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-01 01:15:06,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 01:15:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 01:15:06,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:06,927 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-01 01:15:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:16,277 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-01 01:15:16,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 01:15:16,277 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-01 01:15:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:16,278 INFO L225 Difference]: With dead ends: 119 [2018-10-01 01:15:16,278 INFO L226 Difference]: Without dead ends: 116 [2018-10-01 01:15:16,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:15:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-01 01:15:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-01 01:15:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 01:15:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-01 01:15:16,284 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-01 01:15:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:16,284 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-01 01:15:16,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 01:15:16,284 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-01 01:15:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 01:15:16,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:16,285 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-01 01:15:16,285 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:16,285 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-01 01:15:16,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:16,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:16,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:16,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:16,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:16,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:16,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:16,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:15:16,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-01 01:15:16,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:16,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:17,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:17,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-01 01:15:17,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 01:15:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 01:15:17,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:17,156 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-01 01:15:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:19,508 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-01 01:15:19,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 01:15:19,509 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-01 01:15:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:19,509 INFO L225 Difference]: With dead ends: 120 [2018-10-01 01:15:19,509 INFO L226 Difference]: Without dead ends: 79 [2018-10-01 01:15:19,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:15:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-01 01:15:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-01 01:15:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-01 01:15:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-01 01:15:19,516 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-01 01:15:19,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:19,517 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-01 01:15:19,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 01:15:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-01 01:15:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 01:15:19,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:19,517 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-01 01:15:19,518 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:19,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-01 01:15:19,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:19,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:19,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:19,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:19,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:19,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:19,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:19,838 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:15:19,890 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-01 01:15:19,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:19,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:20,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:20,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-01 01:15:20,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 01:15:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 01:15:20,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:20,069 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-01 01:15:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:20,548 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-01 01:15:20,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 01:15:20,548 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-01 01:15:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:20,549 INFO L225 Difference]: With dead ends: 83 [2018-10-01 01:15:20,549 INFO L226 Difference]: Without dead ends: 80 [2018-10-01 01:15:20,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:15:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-01 01:15:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-01 01:15:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 01:15:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-01 01:15:20,556 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-01 01:15:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:20,556 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-01 01:15:20,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 01:15:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-01 01:15:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-01 01:15:20,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:20,557 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-01 01:15:20,557 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:20,557 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-01 01:15:20,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:20,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:20,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:20,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:20,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:21,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:21,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:21,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:21,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:21,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:21,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-01 01:15:21,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 01:15:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 01:15:21,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:21,789 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-01 01:15:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:31,628 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-01 01:15:31,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 01:15:31,629 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-01 01:15:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:31,630 INFO L225 Difference]: With dead ends: 122 [2018-10-01 01:15:31,630 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 01:15:31,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:15:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 01:15:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-01 01:15:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-01 01:15:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-01 01:15:31,637 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-01 01:15:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:31,637 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-01 01:15:31,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 01:15:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-01 01:15:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 01:15:31,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:31,638 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-01 01:15:31,638 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:31,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-01 01:15:31,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:31,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:31,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:31,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:31,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:31,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:31,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:31,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:15:31,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:15:31,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:31,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:32,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:32,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-01 01:15:32,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 01:15:32,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 01:15:32,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:32,109 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-01 01:15:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:34,001 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-01 01:15:34,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 01:15:34,001 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-01 01:15:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:34,002 INFO L225 Difference]: With dead ends: 123 [2018-10-01 01:15:34,002 INFO L226 Difference]: Without dead ends: 81 [2018-10-01 01:15:34,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:15:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-01 01:15:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-01 01:15:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 01:15:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-01 01:15:34,008 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-01 01:15:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:34,008 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-01 01:15:34,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 01:15:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-01 01:15:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 01:15:34,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:34,008 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-01 01:15:34,009 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:34,009 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-01 01:15:34,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:34,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:34,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:34,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:34,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:34,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:34,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:34,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:15:34,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-01 01:15:34,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:34,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:34,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:34,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-01 01:15:34,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 01:15:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 01:15:34,662 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:34,662 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-01 01:15:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:35,153 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-01 01:15:35,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 01:15:35,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-01 01:15:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:35,154 INFO L225 Difference]: With dead ends: 85 [2018-10-01 01:15:35,154 INFO L226 Difference]: Without dead ends: 82 [2018-10-01 01:15:35,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:15:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-01 01:15:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-01 01:15:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-01 01:15:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-01 01:15:35,160 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-01 01:15:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:35,160 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-01 01:15:35,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 01:15:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-01 01:15:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-01 01:15:35,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:35,160 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-01 01:15:35,161 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:35,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-01 01:15:35,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:35,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:35,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:35,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:35,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:36,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:36,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:36,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:15:36,250 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:15:36,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:36,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:36,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:36,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-01 01:15:36,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 01:15:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 01:15:36,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:36,425 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-01 01:15:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:46,839 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-01 01:15:46,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 01:15:46,840 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-01 01:15:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:46,840 INFO L225 Difference]: With dead ends: 125 [2018-10-01 01:15:46,840 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 01:15:46,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:15:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 01:15:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-01 01:15:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 01:15:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-01 01:15:46,846 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-01 01:15:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:46,846 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-01 01:15:46,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 01:15:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-01 01:15:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 01:15:46,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:46,847 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-01 01:15:46,847 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:46,847 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-01 01:15:46,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:46,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:46,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:46,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:46,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:47,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:47,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:47,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:15:47,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-01 01:15:47,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:47,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:47,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:47,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-01 01:15:47,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 01:15:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 01:15:47,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:47,448 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-01 01:15:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:49,826 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-01 01:15:49,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 01:15:49,826 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-01 01:15:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:49,827 INFO L225 Difference]: With dead ends: 126 [2018-10-01 01:15:49,827 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 01:15:49,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:15:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 01:15:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-01 01:15:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 01:15:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-01 01:15:49,833 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-01 01:15:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:49,833 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-01 01:15:49,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 01:15:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-01 01:15:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 01:15:49,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:49,834 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-01 01:15:49,834 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:49,834 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:49,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-01 01:15:49,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:49,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:49,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:49,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:49,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:50,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:50,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:50,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:15:50,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-01 01:15:50,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:15:50,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:50,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:50,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-01 01:15:50,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 01:15:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 01:15:50,399 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:50,399 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-01 01:15:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:15:50,925 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-01 01:15:50,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 01:15:50,925 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-01 01:15:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:15:50,926 INFO L225 Difference]: With dead ends: 87 [2018-10-01 01:15:50,926 INFO L226 Difference]: Without dead ends: 84 [2018-10-01 01:15:50,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:15:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-01 01:15:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-01 01:15:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 01:15:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-01 01:15:50,932 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-01 01:15:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:15:50,932 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-01 01:15:50,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 01:15:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-01 01:15:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-01 01:15:50,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:15:50,933 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-01 01:15:50,933 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:15:50,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:15:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-01 01:15:50,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:15:50,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:15:50,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:50,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:15:50,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:15:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:52,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:15:52,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:15:52,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:15:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:15:52,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:15:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:15:52,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:15:52,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-01 01:15:52,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 01:15:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 01:15:52,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:15:52,276 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-01 01:16:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:03,210 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-01 01:16:03,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 01:16:03,211 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-01 01:16:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:03,211 INFO L225 Difference]: With dead ends: 128 [2018-10-01 01:16:03,211 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 01:16:03,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:16:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 01:16:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-01 01:16:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 01:16:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-01 01:16:03,218 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-01 01:16:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:03,218 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-01 01:16:03,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 01:16:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-01 01:16:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 01:16:03,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:03,218 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-01 01:16:03,219 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:03,219 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:03,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-01 01:16:03,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:03,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:03,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:03,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:03,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:03,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:03,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:03,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:16:03,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:16:03,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:03,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:03,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:03,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-01 01:16:03,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 01:16:03,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 01:16:03,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:03,720 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-01 01:16:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:05,339 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-01 01:16:05,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 01:16:05,340 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-01 01:16:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:05,341 INFO L225 Difference]: With dead ends: 129 [2018-10-01 01:16:05,341 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 01:16:05,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:16:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 01:16:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 01:16:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 01:16:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-01 01:16:05,347 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-01 01:16:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:05,348 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-01 01:16:05,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 01:16:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-01 01:16:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 01:16:05,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:05,348 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-01 01:16:05,349 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:05,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-01 01:16:05,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:05,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:05,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:05,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:05,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:05,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:05,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:05,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:16:05,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-01 01:16:05,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:05,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:06,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:06,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-01 01:16:06,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 01:16:06,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 01:16:06,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:06,055 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-01 01:16:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:06,677 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-01 01:16:06,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 01:16:06,677 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-01 01:16:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:06,678 INFO L225 Difference]: With dead ends: 89 [2018-10-01 01:16:06,678 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 01:16:06,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:16:06,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 01:16:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-01 01:16:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 01:16:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-01 01:16:06,686 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-01 01:16:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:06,686 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-01 01:16:06,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 01:16:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-01 01:16:06,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-01 01:16:06,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:06,687 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-01 01:16:06,687 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:06,687 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-01 01:16:06,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:06,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:06,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:06,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:06,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:07,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:07,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:07,864 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:16:07,916 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:16:07,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:07,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:08,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:08,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-01 01:16:08,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 01:16:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 01:16:08,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:08,125 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-01 01:16:19,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:19,578 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-01 01:16:19,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 01:16:19,579 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-01 01:16:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:19,579 INFO L225 Difference]: With dead ends: 131 [2018-10-01 01:16:19,579 INFO L226 Difference]: Without dead ends: 128 [2018-10-01 01:16:19,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 01:16:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-01 01:16:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-01 01:16:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 01:16:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-01 01:16:19,587 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-01 01:16:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:19,587 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-01 01:16:19,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 01:16:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-01 01:16:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 01:16:19,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:19,588 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-01 01:16:19,588 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:19,588 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:19,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-01 01:16:19,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:19,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:19,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:19,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:19,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:19,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:19,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:19,888 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:19,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-01 01:16:19,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:19,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:20,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:20,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-01 01:16:20,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 01:16:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 01:16:20,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:20,138 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-01 01:16:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:22,331 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-01 01:16:22,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 01:16:22,331 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-01 01:16:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:22,332 INFO L225 Difference]: With dead ends: 132 [2018-10-01 01:16:22,332 INFO L226 Difference]: Without dead ends: 87 [2018-10-01 01:16:22,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:16:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-01 01:16:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-01 01:16:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 01:16:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-01 01:16:22,338 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-01 01:16:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:22,338 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-01 01:16:22,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 01:16:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-01 01:16:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 01:16:22,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:22,339 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-01 01:16:22,339 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:22,340 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:22,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-01 01:16:22,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:22,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:22,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:22,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:22,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:22,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:22,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:22,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:16:22,750 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-01 01:16:22,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:22,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:22,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:22,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-01 01:16:22,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 01:16:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 01:16:22,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:22,924 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-01 01:16:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:23,474 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-01 01:16:23,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 01:16:23,474 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-01 01:16:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:23,475 INFO L225 Difference]: With dead ends: 91 [2018-10-01 01:16:23,475 INFO L226 Difference]: Without dead ends: 88 [2018-10-01 01:16:23,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:16:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-01 01:16:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-01 01:16:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 01:16:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-01 01:16:23,482 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-01 01:16:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:23,483 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-01 01:16:23,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 01:16:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-01 01:16:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-01 01:16:23,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:23,483 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-01 01:16:23,484 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:23,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-01 01:16:23,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:23,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:23,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:23,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:23,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:24,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:24,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:24,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:24,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:25,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:25,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-01 01:16:25,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 01:16:25,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 01:16:25,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:25,132 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-01 01:16:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:37,227 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-01 01:16:37,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 01:16:37,228 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-01 01:16:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:37,228 INFO L225 Difference]: With dead ends: 134 [2018-10-01 01:16:37,229 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 01:16:37,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:16:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 01:16:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-01 01:16:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 01:16:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-01 01:16:37,236 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-01 01:16:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:37,236 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-01 01:16:37,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 01:16:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-01 01:16:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 01:16:37,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:37,237 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-01 01:16:37,237 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:37,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-01 01:16:37,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:37,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:37,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:37,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:16:37,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:37,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:37,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:37,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:16:37,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:16:37,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:37,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:37,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:37,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-01 01:16:37,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 01:16:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 01:16:37,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:37,861 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-01 01:16:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:39,878 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-01 01:16:39,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 01:16:39,879 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-01 01:16:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:39,879 INFO L225 Difference]: With dead ends: 135 [2018-10-01 01:16:39,879 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 01:16:39,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:16:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 01:16:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 01:16:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 01:16:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-01 01:16:39,884 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-01 01:16:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:39,884 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-01 01:16:39,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 01:16:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-01 01:16:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 01:16:39,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:39,885 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-01 01:16:39,885 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:39,885 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:39,885 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-01 01:16:39,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:39,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:39,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:39,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:39,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:40,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:40,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:40,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:16:40,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-01 01:16:40,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:40,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:40,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:40,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-01 01:16:40,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 01:16:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 01:16:40,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:40,526 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-01 01:16:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:41,093 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-01 01:16:41,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 01:16:41,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-01 01:16:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:41,095 INFO L225 Difference]: With dead ends: 93 [2018-10-01 01:16:41,095 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 01:16:41,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:16:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 01:16:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-01 01:16:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 01:16:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-01 01:16:41,101 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-01 01:16:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:41,101 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-01 01:16:41,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 01:16:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-01 01:16:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-01 01:16:41,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:41,101 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-01 01:16:41,102 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:41,102 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-01 01:16:41,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:41,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:41,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:41,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:41,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:42,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:42,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:42,368 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:16:42,425 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:16:42,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:42,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:42,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:42,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-01 01:16:42,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 01:16:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 01:16:42,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:42,617 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-01 01:16:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:55,153 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-01 01:16:55,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 01:16:55,153 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-01 01:16:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:55,154 INFO L225 Difference]: With dead ends: 137 [2018-10-01 01:16:55,154 INFO L226 Difference]: Without dead ends: 134 [2018-10-01 01:16:55,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 01:16:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-01 01:16:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-01 01:16:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-01 01:16:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-01 01:16:55,161 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-01 01:16:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:55,162 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-01 01:16:55,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 01:16:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-01 01:16:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 01:16:55,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:55,162 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-01 01:16:55,163 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:55,163 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:55,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-01 01:16:55,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:55,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:55,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:55,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:55,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:55,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:55,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:55,470 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:55,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-01 01:16:55,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:55,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:55,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:55,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-01 01:16:55,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 01:16:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 01:16:55,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:55,711 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-01 01:16:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:57,448 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-01 01:16:57,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 01:16:57,448 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-01 01:16:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:57,449 INFO L225 Difference]: With dead ends: 138 [2018-10-01 01:16:57,449 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 01:16:57,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:16:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 01:16:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 01:16:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 01:16:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-01 01:16:57,455 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-01 01:16:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:57,455 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-01 01:16:57,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 01:16:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-01 01:16:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 01:16:57,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:57,456 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-01 01:16:57,456 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:57,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:57,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-01 01:16:57,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:57,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:57,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:57,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:57,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:57,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:57,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:57,832 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:16:57,896 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-01 01:16:57,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:57,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:58,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:58,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-01 01:16:58,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 01:16:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 01:16:58,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:58,073 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-01 01:16:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:58,635 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-01 01:16:58,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 01:16:58,636 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-01 01:16:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:58,636 INFO L225 Difference]: With dead ends: 95 [2018-10-01 01:16:58,637 INFO L226 Difference]: Without dead ends: 92 [2018-10-01 01:16:58,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:16:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-01 01:16:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-01 01:16:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-01 01:16:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-01 01:16:58,643 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-01 01:16:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:58,643 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-01 01:16:58,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 01:16:58,644 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-01 01:16:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-01 01:16:58,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:58,644 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-01 01:16:58,645 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:58,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:58,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-01 01:16:58,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:58,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:58,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:58,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:58,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:59,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:59,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:59,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:00,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:00,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:00,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-01 01:17:00,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 01:17:00,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 01:17:00,262 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:00,262 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-01 01:17:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:13,386 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-01 01:17:13,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 01:17:13,387 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-01 01:17:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:13,387 INFO L225 Difference]: With dead ends: 140 [2018-10-01 01:17:13,387 INFO L226 Difference]: Without dead ends: 137 [2018-10-01 01:17:13,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:17:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-01 01:17:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-01 01:17:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 01:17:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-01 01:17:13,394 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-01 01:17:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:13,394 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-01 01:17:13,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 01:17:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-01 01:17:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 01:17:13,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:13,395 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-01 01:17:13,395 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:13,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-01 01:17:13,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:13,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:13,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:13,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:13,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:13,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:13,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:13,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:13,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:13,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:13,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:13,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:13,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-01 01:17:13,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 01:17:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 01:17:13,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:13,951 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-01 01:17:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:17,067 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-01 01:17:17,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 01:17:17,068 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-01 01:17:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:17,068 INFO L225 Difference]: With dead ends: 141 [2018-10-01 01:17:17,068 INFO L226 Difference]: Without dead ends: 93 [2018-10-01 01:17:17,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:17:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-01 01:17:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-01 01:17:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-01 01:17:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-01 01:17:17,074 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-01 01:17:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:17,075 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-01 01:17:17,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 01:17:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-01 01:17:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 01:17:17,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:17,075 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-01 01:17:17,076 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:17,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-01 01:17:17,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:17,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:17,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:17,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:17,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:17,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:17,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:17,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:17,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-01 01:17:17,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:17,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:17,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:17,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-01 01:17:17,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 01:17:17,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 01:17:17,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:17,746 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-01 01:17:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:18,316 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-01 01:17:18,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 01:17:18,317 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-01 01:17:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:18,318 INFO L225 Difference]: With dead ends: 97 [2018-10-01 01:17:18,318 INFO L226 Difference]: Without dead ends: 94 [2018-10-01 01:17:18,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:17:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-01 01:17:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-01 01:17:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 01:17:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-01 01:17:18,325 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-01 01:17:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:18,325 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-01 01:17:18,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 01:17:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-01 01:17:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-01 01:17:18,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:18,326 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-01 01:17:18,326 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:18,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-01 01:17:18,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:18,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:18,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:18,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:18,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:19,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:19,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:19,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:17:19,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:17:19,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:19,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:20,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:20,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-01 01:17:20,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 01:17:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 01:17:20,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:20,111 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-01 01:17:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:33,834 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-01 01:17:33,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 01:17:33,835 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-01 01:17:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:33,836 INFO L225 Difference]: With dead ends: 143 [2018-10-01 01:17:33,836 INFO L226 Difference]: Without dead ends: 140 [2018-10-01 01:17:33,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 01:17:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-01 01:17:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-01 01:17:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-01 01:17:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-01 01:17:33,842 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-01 01:17:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:33,842 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-01 01:17:33,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 01:17:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-01 01:17:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 01:17:33,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:33,843 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-01 01:17:33,843 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:33,843 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-01 01:17:33,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:33,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:33,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:33,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:33,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:34,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:34,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:34,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:17:34,242 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-01 01:17:34,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:34,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:34,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:34,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-01 01:17:34,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 01:17:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 01:17:34,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:34,428 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-01 01:17:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:36,325 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-01 01:17:36,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 01:17:36,325 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-01 01:17:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:36,326 INFO L225 Difference]: With dead ends: 144 [2018-10-01 01:17:36,326 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 01:17:36,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:17:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 01:17:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-01 01:17:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-01 01:17:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-01 01:17:36,332 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-01 01:17:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:36,333 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-01 01:17:36,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 01:17:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-01 01:17:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 01:17:36,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:36,333 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-01 01:17:36,333 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:36,333 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-01 01:17:36,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:36,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:36,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:36,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:36,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:36,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:36,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:36,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:17:36,825 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-01 01:17:36,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:36,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:37,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:37,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-01 01:17:37,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 01:17:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 01:17:37,045 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:37,045 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-01 01:17:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:37,713 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-01 01:17:37,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 01:17:37,714 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-01 01:17:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:37,714 INFO L225 Difference]: With dead ends: 99 [2018-10-01 01:17:37,714 INFO L226 Difference]: Without dead ends: 96 [2018-10-01 01:17:37,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:17:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-01 01:17:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-01 01:17:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-01 01:17:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-01 01:17:37,721 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-01 01:17:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:37,721 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-01 01:17:37,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 01:17:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-01 01:17:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-01 01:17:37,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:37,722 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-01 01:17:37,722 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:37,722 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:37,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-01 01:17:37,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:37,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:37,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:37,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:37,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:39,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:39,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:39,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:39,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:39,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:39,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-01 01:17:39,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 01:17:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 01:17:39,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:39,418 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-01 01:17:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:53,720 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-01 01:17:53,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 01:17:53,720 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-01 01:17:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:53,721 INFO L225 Difference]: With dead ends: 146 [2018-10-01 01:17:53,721 INFO L226 Difference]: Without dead ends: 143 [2018-10-01 01:17:53,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 01:17:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-01 01:17:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-01 01:17:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-01 01:17:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-01 01:17:53,727 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-01 01:17:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:53,728 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-01 01:17:53,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 01:17:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-01 01:17:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 01:17:53,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:53,728 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-01 01:17:53,728 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:53,728 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:53,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-01 01:17:53,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:53,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:53,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:53,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:53,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:54,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:54,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:54,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:54,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:54,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:54,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:54,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:54,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-01 01:17:54,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 01:17:54,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 01:17:54,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:54,298 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-01 01:17:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:56,505 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-01 01:17:56,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 01:17:56,505 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-01 01:17:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:56,506 INFO L225 Difference]: With dead ends: 147 [2018-10-01 01:17:56,506 INFO L226 Difference]: Without dead ends: 97 [2018-10-01 01:17:56,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:17:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-01 01:17:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-01 01:17:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-01 01:17:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-01 01:17:56,512 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-01 01:17:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:56,513 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-01 01:17:56,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 01:17:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-01 01:17:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 01:17:56,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:56,513 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-01 01:17:56,513 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:56,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-01 01:17:56,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:56,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:56,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:56,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:56,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:56,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:17:56,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-01 01:17:56,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:56,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:57,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:57,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-01 01:17:57,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 01:17:57,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 01:17:57,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:57,186 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-01 01:17:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:57,806 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-01 01:17:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 01:17:57,807 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-01 01:17:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:57,807 INFO L225 Difference]: With dead ends: 101 [2018-10-01 01:17:57,807 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 01:17:57,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:17:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 01:17:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-01 01:17:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-01 01:17:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-01 01:17:57,814 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-01 01:17:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:57,814 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-01 01:17:57,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 01:17:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-01 01:17:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-01 01:17:57,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:57,815 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-01 01:17:57,815 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:57,815 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:57,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-01 01:17:57,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:57,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:57,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:57,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:57,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:59,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:59,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:59,297 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:17:59,364 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:17:59,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:59,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:59,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:59,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-01 01:17:59,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 01:17:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 01:17:59,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:59,578 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-01 01:18:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:14,592 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-01 01:18:14,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 01:18:14,593 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-01 01:18:14,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:14,593 INFO L225 Difference]: With dead ends: 149 [2018-10-01 01:18:14,593 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 01:18:14,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 01:18:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 01:18:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-01 01:18:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-01 01:18:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-01 01:18:14,600 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-01 01:18:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:14,600 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-01 01:18:14,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 01:18:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-01 01:18:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 01:18:14,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:14,601 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-01 01:18:14,601 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:14,601 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-01 01:18:14,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:14,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:14,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:14,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:14,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:14,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:14,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:14,939 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:18:15,017 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-01 01:18:15,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:15,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:15,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:15,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-01 01:18:15,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 01:18:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 01:18:15,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:15,259 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-01 01:18:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:17,637 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-01 01:18:17,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 01:18:17,638 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-01 01:18:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:17,638 INFO L225 Difference]: With dead ends: 150 [2018-10-01 01:18:17,639 INFO L226 Difference]: Without dead ends: 99 [2018-10-01 01:18:17,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:18:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-01 01:18:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-01 01:18:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-01 01:18:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-01 01:18:17,645 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-01 01:18:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:17,646 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-01 01:18:17,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 01:18:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-01 01:18:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 01:18:17,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:17,646 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-01 01:18:17,647 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:17,647 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-01 01:18:17,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:17,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:17,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:17,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:17,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:18,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:18,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:18,087 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:18:18,157 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-01 01:18:18,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:18,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:18,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:18,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-01 01:18:18,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 01:18:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 01:18:18,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:18,347 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-01 01:18:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:19,083 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-01 01:18:19,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 01:18:19,083 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-01 01:18:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:19,084 INFO L225 Difference]: With dead ends: 103 [2018-10-01 01:18:19,084 INFO L226 Difference]: Without dead ends: 100 [2018-10-01 01:18:19,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:18:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-01 01:18:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-01 01:18:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-01 01:18:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-01 01:18:19,091 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-01 01:18:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:19,091 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-01 01:18:19,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 01:18:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-01 01:18:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-01 01:18:19,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:19,092 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-01 01:18:19,092 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:19,092 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:19,092 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-01 01:18:19,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:19,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:19,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:19,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:19,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:20,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:20,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:20,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:20,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:20,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:20,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-01 01:18:20,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 01:18:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 01:18:20,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:20,930 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-01 01:18:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:36,532 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-01 01:18:36,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 01:18:36,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-01 01:18:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:36,533 INFO L225 Difference]: With dead ends: 152 [2018-10-01 01:18:36,533 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 01:18:36,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 01:18:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 01:18:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-01 01:18:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-01 01:18:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-01 01:18:36,540 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-01 01:18:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:36,540 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-01 01:18:36,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 01:18:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-01 01:18:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 01:18:36,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:36,541 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-01 01:18:36,541 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:36,541 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-01 01:18:36,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:36,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:36,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:36,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:18:36,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:36,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:36,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:36,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:18:36,949 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:18:36,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:36,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:37,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:37,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-01 01:18:37,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 01:18:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 01:18:37,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:37,145 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-01 01:18:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:39,289 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-01 01:18:39,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 01:18:39,289 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-01 01:18:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:39,290 INFO L225 Difference]: With dead ends: 153 [2018-10-01 01:18:39,290 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 01:18:39,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:18:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 01:18:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-01 01:18:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 01:18:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-01 01:18:39,298 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-01 01:18:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:39,299 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-01 01:18:39,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 01:18:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-01 01:18:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 01:18:39,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:39,299 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-01 01:18:39,300 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:39,300 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:39,300 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-01 01:18:39,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:39,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:39,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:39,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:39,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:39,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:39,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:39,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:18:39,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-01 01:18:39,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:39,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:40,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:40,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-01 01:18:40,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 01:18:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 01:18:40,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:40,028 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-01 01:18:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:40,736 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-01 01:18:40,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 01:18:40,737 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-01 01:18:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:40,737 INFO L225 Difference]: With dead ends: 105 [2018-10-01 01:18:40,737 INFO L226 Difference]: Without dead ends: 102 [2018-10-01 01:18:40,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:18:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-01 01:18:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-01 01:18:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-01 01:18:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-01 01:18:40,745 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-01 01:18:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:40,745 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-01 01:18:40,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 01:18:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-01 01:18:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-01 01:18:40,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:40,745 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-01 01:18:40,746 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:40,746 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:40,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-01 01:18:40,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:40,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:40,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:40,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:40,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:42,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:42,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:42,471 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:18:42,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:18:42,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:42,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:42,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:42,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-01 01:18:42,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 01:18:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 01:18:42,756 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:42,756 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-01 01:18:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:18:59,022 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-01 01:18:59,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 01:18:59,022 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-01 01:18:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:18:59,023 INFO L225 Difference]: With dead ends: 155 [2018-10-01 01:18:59,023 INFO L226 Difference]: Without dead ends: 152 [2018-10-01 01:18:59,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 01:18:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-01 01:18:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-01 01:18:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-01 01:18:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-01 01:18:59,031 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-01 01:18:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:18:59,031 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-01 01:18:59,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 01:18:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-01 01:18:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 01:18:59,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:18:59,031 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-01 01:18:59,031 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:18:59,032 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:18:59,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-01 01:18:59,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:18:59,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:18:59,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:59,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:18:59,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:18:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:18:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:59,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:18:59,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:18:59,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:18:59,533 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-01 01:18:59,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:18:59,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:18:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:18:59,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:18:59,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-01 01:18:59,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 01:18:59,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 01:18:59,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:18:59,731 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-01 01:19:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:01,872 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-01 01:19:01,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 01:19:01,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-01 01:19:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:01,873 INFO L225 Difference]: With dead ends: 156 [2018-10-01 01:19:01,873 INFO L226 Difference]: Without dead ends: 103 [2018-10-01 01:19:01,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:19:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-01 01:19:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-01 01:19:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-01 01:19:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-01 01:19:01,881 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-01 01:19:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:01,881 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-01 01:19:01,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 01:19:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-01 01:19:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 01:19:01,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:01,882 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-01 01:19:01,882 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:01,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:01,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-01 01:19:01,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:01,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:01,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:01,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:01,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:02,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:02,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:02,324 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:19:02,398 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-01 01:19:02,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:02,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:02,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:02,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-01 01:19:02,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 01:19:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 01:19:02,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:02,609 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-01 01:19:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:03,334 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-01 01:19:03,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 01:19:03,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-01 01:19:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:03,335 INFO L225 Difference]: With dead ends: 107 [2018-10-01 01:19:03,335 INFO L226 Difference]: Without dead ends: 104 [2018-10-01 01:19:03,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:19:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-01 01:19:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-01 01:19:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-01 01:19:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-01 01:19:03,342 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-01 01:19:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:03,342 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-01 01:19:03,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 01:19:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-01 01:19:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-01 01:19:03,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:03,343 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-01 01:19:03,343 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:03,343 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-01 01:19:03,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:03,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:03,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:03,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:03,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:05,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:05,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:05,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:05,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:05,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:05,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-01 01:19:05,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 01:19:05,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 01:19:05,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:05,319 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-01 01:19:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:22,271 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-01 01:19:22,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 01:19:22,272 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-01 01:19:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:22,272 INFO L225 Difference]: With dead ends: 158 [2018-10-01 01:19:22,273 INFO L226 Difference]: Without dead ends: 155 [2018-10-01 01:19:22,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 01:19:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-01 01:19:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-01 01:19:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-01 01:19:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-01 01:19:22,280 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-01 01:19:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:22,280 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-01 01:19:22,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 01:19:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-01 01:19:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 01:19:22,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:22,280 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-01 01:19:22,281 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:22,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-01 01:19:22,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:22,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:22,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:22,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:22,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:22,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:22,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:22,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:19:22,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:19:22,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:22,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:22,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:22,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-01 01:19:22,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 01:19:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 01:19:22,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:22,905 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-01 01:19:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:24,409 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-01 01:19:24,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 01:19:24,409 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-01 01:19:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:24,410 INFO L225 Difference]: With dead ends: 159 [2018-10-01 01:19:24,410 INFO L226 Difference]: Without dead ends: 105 [2018-10-01 01:19:24,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:19:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-01 01:19:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-01 01:19:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 01:19:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-01 01:19:24,415 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-01 01:19:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:24,416 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-01 01:19:24,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 01:19:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-01 01:19:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 01:19:24,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:24,416 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-01 01:19:24,416 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:24,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:24,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-01 01:19:24,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:24,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:24,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:24,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:24,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:24,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:24,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:24,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:19:24,979 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-01 01:19:24,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:24,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:25,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:25,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-01 01:19:25,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 01:19:25,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 01:19:25,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:25,181 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-01 01:19:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:25,913 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-01 01:19:25,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 01:19:25,913 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-01 01:19:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:25,914 INFO L225 Difference]: With dead ends: 109 [2018-10-01 01:19:25,914 INFO L226 Difference]: Without dead ends: 106 [2018-10-01 01:19:25,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:19:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-01 01:19:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-01 01:19:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-01 01:19:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-01 01:19:25,921 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-01 01:19:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:25,921 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-01 01:19:25,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 01:19:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-01 01:19:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-01 01:19:25,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:25,921 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-01 01:19:25,922 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:25,922 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:25,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-01 01:19:25,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:25,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:25,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:25,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:25,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:27,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:27,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:27,700 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:19:27,766 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:19:27,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:27,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:28,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:28,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-01 01:19:28,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 01:19:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 01:19:28,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:28,008 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-01 01:19:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:45,635 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-01 01:19:45,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 01:19:45,636 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-01 01:19:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:45,636 INFO L225 Difference]: With dead ends: 161 [2018-10-01 01:19:45,636 INFO L226 Difference]: Without dead ends: 158 [2018-10-01 01:19:45,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 01:19:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-01 01:19:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-01 01:19:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 01:19:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-01 01:19:45,644 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-01 01:19:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:45,644 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-01 01:19:45,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 01:19:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-01 01:19:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 01:19:45,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:45,644 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-01 01:19:45,644 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:45,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:45,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-01 01:19:45,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:45,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:45,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:45,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:45,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:45,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:46,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:19:46,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-01 01:19:46,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:46,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:46,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:46,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-01 01:19:46,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 01:19:46,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 01:19:46,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:46,303 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-01 01:19:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:48,636 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-01 01:19:48,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 01:19:48,636 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-01 01:19:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:48,637 INFO L225 Difference]: With dead ends: 162 [2018-10-01 01:19:48,637 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 01:19:48,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:19:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 01:19:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-01 01:19:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-01 01:19:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-01 01:19:48,647 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-01 01:19:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:48,647 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-01 01:19:48,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 01:19:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-01 01:19:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 01:19:48,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:48,648 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-01 01:19:48,648 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:48,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-01 01:19:48,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:48,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:48,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:48,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:48,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:49,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:49,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:49,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:19:49,262 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-01 01:19:49,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:49,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:49,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:49,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-01 01:19:49,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 01:19:49,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 01:19:49,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:49,471 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-01 01:19:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:50,269 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-01 01:19:50,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 01:19:50,269 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-01 01:19:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:50,270 INFO L225 Difference]: With dead ends: 111 [2018-10-01 01:19:50,270 INFO L226 Difference]: Without dead ends: 108 [2018-10-01 01:19:50,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:19:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-01 01:19:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-01 01:19:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 01:19:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-01 01:19:50,277 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-01 01:19:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:50,277 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-01 01:19:50,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 01:19:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-01 01:19:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-01 01:19:50,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:50,277 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-01 01:19:50,278 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:50,278 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:50,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-01 01:19:50,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:50,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:50,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:50,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:50,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:52,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:52,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:52,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:19:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:52,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:52,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:52,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-01 01:19:52,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 01:19:52,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 01:19:52,400 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:52,401 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-01 01:20:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:10,754 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-01 01:20:10,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 01:20:10,754 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-01 01:20:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:10,755 INFO L225 Difference]: With dead ends: 164 [2018-10-01 01:20:10,755 INFO L226 Difference]: Without dead ends: 161 [2018-10-01 01:20:10,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 01:20:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-01 01:20:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-01 01:20:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-01 01:20:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-01 01:20:10,763 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-01 01:20:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:10,763 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-01 01:20:10,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 01:20:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-01 01:20:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 01:20:10,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:10,763 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-01 01:20:10,764 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:10,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-01 01:20:10,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:10,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:10,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:10,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:10,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:11,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:11,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:11,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:20:11,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:20:11,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:11,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:11,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:11,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-01 01:20:11,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 01:20:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 01:20:11,486 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:11,487 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-01 01:20:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:14,124 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-01 01:20:14,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 01:20:14,124 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-01 01:20:14,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:14,125 INFO L225 Difference]: With dead ends: 165 [2018-10-01 01:20:14,125 INFO L226 Difference]: Without dead ends: 109 [2018-10-01 01:20:14,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:20:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-01 01:20:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-01 01:20:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-01 01:20:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-01 01:20:14,133 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-01 01:20:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:14,134 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-01 01:20:14,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 01:20:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-01 01:20:14,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 01:20:14,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:14,134 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-01 01:20:14,135 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:14,135 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:14,135 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-01 01:20:14,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:14,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:14,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:14,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:14,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:14,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:14,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:14,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:20:14,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-01 01:20:14,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:14,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:14,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:14,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-01 01:20:14,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 01:20:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 01:20:14,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:14,942 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-01 01:20:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:15,706 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-01 01:20:15,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 01:20:15,707 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-01 01:20:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:15,707 INFO L225 Difference]: With dead ends: 113 [2018-10-01 01:20:15,707 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 01:20:15,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:20:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 01:20:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-01 01:20:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-01 01:20:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-01 01:20:15,713 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-01 01:20:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:15,714 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-01 01:20:15,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 01:20:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-01 01:20:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-01 01:20:15,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:15,714 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-01 01:20:15,714 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:15,714 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-01 01:20:15,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:15,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:15,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:17,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:17,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:17,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:20:17,695 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:20:17,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:17,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:17,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:17,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-01 01:20:17,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 01:20:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 01:20:17,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:17,944 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-01 01:20:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:36,947 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-01 01:20:36,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 01:20:36,947 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-01 01:20:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:36,948 INFO L225 Difference]: With dead ends: 167 [2018-10-01 01:20:36,948 INFO L226 Difference]: Without dead ends: 164 [2018-10-01 01:20:36,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 01:20:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-01 01:20:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-01 01:20:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 01:20:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-01 01:20:36,956 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-01 01:20:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:36,956 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-01 01:20:36,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 01:20:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-01 01:20:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 01:20:36,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:36,957 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-01 01:20:36,957 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:36,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-01 01:20:36,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:36,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:36,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:36,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:36,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:37,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:37,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:37,342 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:20:37,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-01 01:20:37,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:37,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:37,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:37,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-01 01:20:37,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 01:20:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 01:20:37,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:37,685 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-01 01:20:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:40,335 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-01 01:20:40,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 01:20:40,336 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-01 01:20:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:40,336 INFO L225 Difference]: With dead ends: 168 [2018-10-01 01:20:40,337 INFO L226 Difference]: Without dead ends: 111 [2018-10-01 01:20:40,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:20:40,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-01 01:20:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-01 01:20:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-01 01:20:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-01 01:20:40,344 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-01 01:20:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:40,344 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-01 01:20:40,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 01:20:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-01 01:20:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 01:20:40,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:40,345 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-01 01:20:40,345 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:40,345 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-01 01:20:40,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:40,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:40,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:40,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:40,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:40,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:40,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:40,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:20:40,923 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-01 01:20:40,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:20:40,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:41,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:41,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-01 01:20:41,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 01:20:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 01:20:41,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:41,139 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-01 01:20:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:20:41,965 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-01 01:20:41,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 01:20:41,966 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-01 01:20:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:20:41,966 INFO L225 Difference]: With dead ends: 115 [2018-10-01 01:20:41,966 INFO L226 Difference]: Without dead ends: 112 [2018-10-01 01:20:41,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:20:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-01 01:20:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-01 01:20:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 01:20:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-01 01:20:41,974 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-01 01:20:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:20:41,974 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-01 01:20:41,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 01:20:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-01 01:20:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-01 01:20:41,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:20:41,974 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-01 01:20:41,974 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:20:41,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:20:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-01 01:20:41,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:20:41,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:20:41,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:41,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:20:41,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:20:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:43,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:20:43,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:20:43,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:20:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:20:43,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:20:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:20:44,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:20:44,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-01 01:20:44,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 01:20:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 01:20:44,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:20:44,216 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-01 01:21:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:03,921 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-01 01:21:03,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 01:21:03,922 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-01 01:21:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:03,922 INFO L225 Difference]: With dead ends: 170 [2018-10-01 01:21:03,923 INFO L226 Difference]: Without dead ends: 167 [2018-10-01 01:21:03,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 01:21:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-01 01:21:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-01 01:21:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-01 01:21:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-01 01:21:03,932 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-01 01:21:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:03,932 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-01 01:21:03,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 01:21:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-01 01:21:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 01:21:03,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:03,933 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-01 01:21:03,933 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:03,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-01 01:21:03,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:03,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:03,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:03,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:03,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:04,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:04,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:04,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:21:04,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:21:04,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:04,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:04,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:04,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-01 01:21:04,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 01:21:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 01:21:04,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:04,621 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-01 01:21:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:06,297 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-01 01:21:06,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 01:21:06,297 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-01 01:21:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:06,298 INFO L225 Difference]: With dead ends: 171 [2018-10-01 01:21:06,298 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 01:21:06,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:21:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 01:21:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-01 01:21:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-01 01:21:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-01 01:21:06,304 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-01 01:21:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:06,305 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-01 01:21:06,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 01:21:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-01 01:21:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 01:21:06,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:06,305 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-01 01:21:06,305 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:06,305 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-01 01:21:06,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:06,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:06,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:06,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:06,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:06,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:21:06,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-01 01:21:06,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:06,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:07,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:07,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-01 01:21:07,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 01:21:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 01:21:07,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:07,165 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-01 01:21:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:08,223 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-01 01:21:08,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 01:21:08,223 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-01 01:21:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:08,224 INFO L225 Difference]: With dead ends: 117 [2018-10-01 01:21:08,224 INFO L226 Difference]: Without dead ends: 114 [2018-10-01 01:21:08,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:21:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-01 01:21:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-01 01:21:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-01 01:21:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-01 01:21:08,237 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-01 01:21:08,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:08,237 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-01 01:21:08,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 01:21:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-01 01:21:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-01 01:21:08,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:08,238 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-01 01:21:08,238 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:08,238 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-01 01:21:08,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:08,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:08,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:08,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:08,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:10,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:10,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:10,236 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:21:10,306 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:21:10,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:10,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:10,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:10,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-01 01:21:10,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 01:21:10,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 01:21:10,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:10,561 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-01 01:21:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:31,008 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-01 01:21:31,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 01:21:31,009 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-01 01:21:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:31,010 INFO L225 Difference]: With dead ends: 173 [2018-10-01 01:21:31,010 INFO L226 Difference]: Without dead ends: 170 [2018-10-01 01:21:31,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 01:21:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-01 01:21:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-01 01:21:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-01 01:21:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-01 01:21:31,018 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-01 01:21:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:31,018 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-01 01:21:31,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 01:21:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-01 01:21:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 01:21:31,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:31,019 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-01 01:21:31,019 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:31,019 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-01 01:21:31,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:31,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:31,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:31,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:31,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:31,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:31,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:31,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:21:31,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-01 01:21:31,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:31,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:31,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:31,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-01 01:21:31,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 01:21:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 01:21:31,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:31,743 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-01 01:21:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:34,510 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-01 01:21:34,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 01:21:34,511 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-01 01:21:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:34,511 INFO L225 Difference]: With dead ends: 174 [2018-10-01 01:21:34,511 INFO L226 Difference]: Without dead ends: 115 [2018-10-01 01:21:34,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:21:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-01 01:21:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-01 01:21:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 01:21:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-01 01:21:34,521 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-01 01:21:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:34,521 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-01 01:21:34,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 01:21:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-01 01:21:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 01:21:34,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:34,522 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-01 01:21:34,522 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:34,522 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-01 01:21:34,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:34,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:34,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:34,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:34,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:35,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:35,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:35,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:21:35,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-01 01:21:35,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:21:35,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:35,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:35,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-01 01:21:35,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 01:21:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 01:21:35,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:35,360 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-01 01:21:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:36,354 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-01 01:21:36,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 01:21:36,354 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-01 01:21:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:36,355 INFO L225 Difference]: With dead ends: 119 [2018-10-01 01:21:36,355 INFO L226 Difference]: Without dead ends: 116 [2018-10-01 01:21:36,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:21:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-01 01:21:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-01 01:21:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-01 01:21:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-01 01:21:36,363 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-01 01:21:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:36,363 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-01 01:21:36,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 01:21:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-01 01:21:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-01 01:21:36,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:36,364 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-01 01:21:36,364 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:36,364 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-01 01:21:36,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:36,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:36,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:36,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:21:36,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:38,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:21:38,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:21:38,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:21:38,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:21:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:21:38,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:21:38,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-01 01:21:38,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 01:21:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 01:21:38,755 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:21:38,755 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-10-01 01:21:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:21:59,935 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-01 01:21:59,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 01:21:59,935 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-10-01 01:21:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:21:59,936 INFO L225 Difference]: With dead ends: 176 [2018-10-01 01:21:59,936 INFO L226 Difference]: Without dead ends: 173 [2018-10-01 01:21:59,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 01:21:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-01 01:21:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-10-01 01:21:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-01 01:21:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-10-01 01:21:59,945 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-10-01 01:21:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:21:59,945 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-10-01 01:21:59,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 01:21:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-10-01 01:21:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 01:21:59,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:21:59,945 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-01 01:21:59,945 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:21:59,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:21:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-10-01 01:21:59,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:21:59,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:21:59,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:59,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:21:59,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:21:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:00,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:00,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:00,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:22:00,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:22:00,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:00,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:00,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:00,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-01 01:22:00,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 01:22:00,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 01:22:00,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:00,663 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-10-01 01:22:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:02,475 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-10-01 01:22:02,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 01:22:02,476 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-01 01:22:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:02,476 INFO L225 Difference]: With dead ends: 177 [2018-10-01 01:22:02,476 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 01:22:02,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:22:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 01:22:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-01 01:22:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-01 01:22:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-01 01:22:02,486 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-10-01 01:22:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:02,486 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-01 01:22:02,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 01:22:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-01 01:22:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 01:22:02,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:02,487 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-10-01 01:22:02,487 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:02,487 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-10-01 01:22:02,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:02,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:02,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:02,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:02,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:03,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:03,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:03,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:22:03,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-01 01:22:03,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:03,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:03,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:03,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-01 01:22:03,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 01:22:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 01:22:03,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:03,370 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-10-01 01:22:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:04,327 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-01 01:22:04,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 01:22:04,327 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-01 01:22:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:04,328 INFO L225 Difference]: With dead ends: 121 [2018-10-01 01:22:04,328 INFO L226 Difference]: Without dead ends: 118 [2018-10-01 01:22:04,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:22:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-01 01:22:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-01 01:22:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-01 01:22:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-01 01:22:04,336 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-10-01 01:22:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:04,336 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-01 01:22:04,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 01:22:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-01 01:22:04,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-01 01:22:04,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:04,337 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-10-01 01:22:04,337 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:04,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-10-01 01:22:04,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:04,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:04,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:04,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:04,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:06,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:06,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:06,475 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:22:06,552 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:22:06,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:06,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:06,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:06,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-01 01:22:06,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 01:22:06,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 01:22:06,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:06,820 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-10-01 01:22:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:28,740 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-10-01 01:22:28,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 01:22:28,741 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-10-01 01:22:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:28,741 INFO L225 Difference]: With dead ends: 179 [2018-10-01 01:22:28,742 INFO L226 Difference]: Without dead ends: 176 [2018-10-01 01:22:28,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-10-01 01:22:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-01 01:22:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-10-01 01:22:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-01 01:22:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-01 01:22:28,753 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-10-01 01:22:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:28,753 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-01 01:22:28,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 01:22:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-01 01:22:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 01:22:28,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:28,754 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-01 01:22:28,754 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:28,754 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-10-01 01:22:28,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:28,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:28,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:28,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:28,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:29,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:29,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:29,177 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:22:29,279 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-01 01:22:29,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:29,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:29,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:29,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-01 01:22:29,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 01:22:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 01:22:29,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:29,663 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. [2018-10-01 01:22:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:32,682 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-10-01 01:22:32,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 01:22:32,682 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-01 01:22:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:32,683 INFO L225 Difference]: With dead ends: 180 [2018-10-01 01:22:32,683 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 01:22:32,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:22:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 01:22:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-01 01:22:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-01 01:22:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-01 01:22:32,692 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 118 [2018-10-01 01:22:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:32,692 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-01 01:22:32,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 01:22:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-01 01:22:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 01:22:32,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:32,693 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-10-01 01:22:32,693 INFO L423 AbstractCegarLoop]: === Iteration 171 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:32,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1725607533, now seen corresponding path program 168 times [2018-10-01 01:22:32,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:32,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:32,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:32,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:32,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:33,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:33,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:33,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:22:33,374 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-01 01:22:33,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:33,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:33,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:33,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-01 01:22:33,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 01:22:33,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 01:22:33,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:33,612 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-10-01 01:22:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:34,788 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-10-01 01:22:34,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 01:22:34,788 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-01 01:22:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:34,789 INFO L225 Difference]: With dead ends: 123 [2018-10-01 01:22:34,789 INFO L226 Difference]: Without dead ends: 120 [2018-10-01 01:22:34,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:22:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-01 01:22:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-01 01:22:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-01 01:22:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-01 01:22:34,798 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2018-10-01 01:22:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:34,798 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-01 01:22:34,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 01:22:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-01 01:22:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-01 01:22:34,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:34,799 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1] [2018-10-01 01:22:34,799 INFO L423 AbstractCegarLoop]: === Iteration 172 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:34,799 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:34,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1954164449, now seen corresponding path program 169 times [2018-10-01 01:22:34,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:34,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:34,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:34,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:34,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:37,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:37,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:37,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:22:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:37,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:37,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:37,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-01 01:22:37,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 01:22:37,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 01:22:37,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:37,358 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 60 states. [2018-10-01 01:23:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:23:00,000 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-01 01:23:00,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 01:23:00,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 119 [2018-10-01 01:23:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:23:00,001 INFO L225 Difference]: With dead ends: 182 [2018-10-01 01:23:00,001 INFO L226 Difference]: Without dead ends: 179 [2018-10-01 01:23:00,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 01:23:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-01 01:23:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 122. [2018-10-01 01:23:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 01:23:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-01 01:23:00,010 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-10-01 01:23:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:23:00,010 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-01 01:23:00,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 01:23:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-01 01:23:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 01:23:00,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:23:00,010 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1] [2018-10-01 01:23:00,010 INFO L423 AbstractCegarLoop]: === Iteration 173 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:23:00,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:23:00,011 INFO L82 PathProgramCache]: Analyzing trace with hash 449494253, now seen corresponding path program 170 times [2018-10-01 01:23:00,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:23:00,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:23:00,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:00,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:23:00,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:23:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:00,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:23:00,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:23:00,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:23:00,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:23:00,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:23:00,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:23:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:00,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:23:00,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-01 01:23:00,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 01:23:00,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 01:23:00,747 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:23:00,747 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 61 states. [2018-10-01 01:23:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:23:03,951 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2018-10-01 01:23:03,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 01:23:03,951 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-01 01:23:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:23:03,952 INFO L225 Difference]: With dead ends: 183 [2018-10-01 01:23:03,952 INFO L226 Difference]: Without dead ends: 121 [2018-10-01 01:23:03,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:23:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-01 01:23:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-01 01:23:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-01 01:23:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-01 01:23:03,959 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 120 [2018-10-01 01:23:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:23:03,959 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-01 01:23:03,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 01:23:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-01 01:23:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 01:23:03,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:23:03,960 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1] [2018-10-01 01:23:03,960 INFO L423 AbstractCegarLoop]: === Iteration 174 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:23:03,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:23:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash 180161031, now seen corresponding path program 171 times [2018-10-01 01:23:03,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:23:03,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:23:03,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:03,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:23:03,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:23:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:04,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:23:04,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:23:04,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:23:04,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-01 01:23:04,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:23:04,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:23:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:04,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:23:04,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-01 01:23:04,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 01:23:04,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 01:23:04,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:23:04,968 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 61 states. [2018-10-01 01:23:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:23:06,059 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-01 01:23:06,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 01:23:06,059 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-01 01:23:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:23:06,060 INFO L225 Difference]: With dead ends: 125 [2018-10-01 01:23:06,060 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 01:23:06,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 01:23:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 01:23:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-01 01:23:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 01:23:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-10-01 01:23:06,067 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2018-10-01 01:23:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:23:06,067 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-10-01 01:23:06,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 01:23:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-10-01 01:23:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-01 01:23:06,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:23:06,068 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1] [2018-10-01 01:23:06,068 INFO L423 AbstractCegarLoop]: === Iteration 175 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:23:06,068 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:23:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1289963143, now seen corresponding path program 172 times [2018-10-01 01:23:06,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:23:06,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:23:06,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:06,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:23:06,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:23:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:08,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:23:08,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:23:08,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:23:08,439 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:23:08,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:23:08,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:23:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:08,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:23:08,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-01 01:23:08,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 01:23:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 01:23:08,694 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:23:08,694 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 61 states. [2018-10-01 01:23:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:23:32,108 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-10-01 01:23:32,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 01:23:32,108 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 121 [2018-10-01 01:23:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:23:32,109 INFO L225 Difference]: With dead ends: 185 [2018-10-01 01:23:32,109 INFO L226 Difference]: Without dead ends: 182 [2018-10-01 01:23:32,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 01:23:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-01 01:23:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 124. [2018-10-01 01:23:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 01:23:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-10-01 01:23:32,117 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 121 [2018-10-01 01:23:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:23:32,117 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-10-01 01:23:32,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 01:23:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-10-01 01:23:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 01:23:32,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:23:32,118 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1] [2018-10-01 01:23:32,118 INFO L423 AbstractCegarLoop]: === Iteration 176 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:23:32,118 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:23:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1334090247, now seen corresponding path program 173 times [2018-10-01 01:23:32,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:23:32,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:23:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:32,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:23:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:23:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:32,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:23:32,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:23:32,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:23:32,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-01 01:23:32,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:23:32,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:23:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:32,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:23:32,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-01 01:23:32,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 01:23:32,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 01:23:32,917 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:23:32,917 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 62 states. [2018-10-01 01:23:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:23:35,029 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2018-10-01 01:23:35,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 01:23:35,029 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-01 01:23:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:23:35,030 INFO L225 Difference]: With dead ends: 186 [2018-10-01 01:23:35,030 INFO L226 Difference]: Without dead ends: 123 [2018-10-01 01:23:35,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:23:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-01 01:23:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-01 01:23:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-01 01:23:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-01 01:23:35,042 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 122 [2018-10-01 01:23:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:23:35,042 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-01 01:23:35,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 01:23:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-01 01:23:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 01:23:35,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:23:35,043 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1] [2018-10-01 01:23:35,043 INFO L423 AbstractCegarLoop]: === Iteration 177 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:23:35,043 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:23:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1574694957, now seen corresponding path program 174 times [2018-10-01 01:23:35,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:23:35,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:23:35,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:35,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:23:35,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:23:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:35,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:23:35,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:23:35,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:23:36,078 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-01 01:23:36,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:23:36,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:23:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:36,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:23:36,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-01 01:23:36,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 01:23:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 01:23:36,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:23:36,306 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-10-01 01:23:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:23:37,176 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-10-01 01:23:37,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 01:23:37,177 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-01 01:23:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:23:37,177 INFO L225 Difference]: With dead ends: 127 [2018-10-01 01:23:37,177 INFO L226 Difference]: Without dead ends: 124 [2018-10-01 01:23:37,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:23:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-01 01:23:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-01 01:23:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 01:23:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-10-01 01:23:37,186 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 122 [2018-10-01 01:23:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:23:37,186 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-10-01 01:23:37,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 01:23:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-10-01 01:23:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-01 01:23:37,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:23:37,186 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1] [2018-10-01 01:23:37,186 INFO L423 AbstractCegarLoop]: === Iteration 178 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:23:37,187 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:23:37,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1570841889, now seen corresponding path program 175 times [2018-10-01 01:23:37,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:23:37,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:23:37,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:37,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:23:37,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:23:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:23:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:39,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:23:39,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:23:39,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:23:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:23:39,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:23:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:23:39,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:23:39,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-01 01:23:39,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 01:23:39,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 01:23:39,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:23:39,976 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 62 states. [2018-10-01 01:24:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:24:04,185 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-01 01:24:04,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 01:24:04,185 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 123 [2018-10-01 01:24:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:24:04,186 INFO L225 Difference]: With dead ends: 188 [2018-10-01 01:24:04,186 INFO L226 Difference]: Without dead ends: 185 [2018-10-01 01:24:04,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-10-01 01:24:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-01 01:24:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 126. [2018-10-01 01:24:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-01 01:24:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-10-01 01:24:04,194 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 123 [2018-10-01 01:24:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:24:04,195 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-10-01 01:24:04,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 01:24:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-10-01 01:24:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 01:24:04,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:24:04,195 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1] [2018-10-01 01:24:04,195 INFO L423 AbstractCegarLoop]: === Iteration 179 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:24:04,195 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:24:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1451396781, now seen corresponding path program 176 times [2018-10-01 01:24:04,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:24:04,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:24:04,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:04,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:24:04,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:24:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:04,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:24:04,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:24:04,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:24:04,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:24:04,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:24:04,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:24:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:04,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:24:04,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-01 01:24:04,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-01 01:24:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-01 01:24:04,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:24:04,941 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 63 states. Received shutdown request... [2018-10-01 01:24:08,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 01:24:08,270 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 01:24:08,276 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 01:24:08,277 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 01:24:08 BoogieIcfgContainer [2018-10-01 01:24:08,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 01:24:08,278 INFO L168 Benchmark]: Toolchain (without parser) took 762000.80 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -447.2 MB). Free memory was 1.5 GB in the beginning and 950.7 MB in the end (delta: 526.5 MB). Peak memory consumption was 79.3 MB. Max. memory is 7.1 GB. [2018-10-01 01:24:08,279 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:24:08,280 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:24:08,280 INFO L168 Benchmark]: Boogie Preprocessor took 21.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:24:08,280 INFO L168 Benchmark]: RCFGBuilder took 293.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 01:24:08,281 INFO L168 Benchmark]: TraceAbstraction took 761634.77 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -447.2 MB). Free memory was 1.5 GB in the beginning and 950.7 MB in the end (delta: 505.4 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. [2018-10-01 01:24:08,283 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 293.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 761634.77 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -447.2 MB). Free memory was 1.5 GB in the beginning and 950.7 MB in the end (delta: 505.4 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (126states) and FLOYD_HOARE automaton (currently 62 states, 63 states before enhancement), while ReachableStatesComputation was computing reachable states (151 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (126states) and FLOYD_HOARE automaton (currently 62 states, 63 states before enhancement), while ReachableStatesComputation was computing reachable states (151 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 761.5s OverallTime, 179 OverallIterations, 60 TraceHistogramMax, 618.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 718 SDtfs, 1539 SDslu, 6796 SDs, 0 SdLazy, 183690 SolverSat, 2154 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 200.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22240 GetRequests, 16574 SyntacticMatches, 118 SemanticMatches, 5548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 116.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 178 MinimizatonAttempts, 1770 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 9.9s SatisfiabilityAnalysisTime, 124.1s InterpolantComputationTime, 23013 NumberOfCodeBlocks, 23013 NumberOfCodeBlocksAsserted, 1748 NumberOfCheckSat, 22658 ConstructedInterpolants, 0 QuantifiedInterpolants, 8021086 SizeOfPredicates, 117 NumberOfNonLiveVariables, 49898 ConjunctsInSsa, 14570 ConjunctsInUnsatCore, 355 InterpolantComputations, 3 PerfectInterpolantSequences, 147617/431997 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_01-24-08-292.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_01-24-08-292.csv Completed graceful shutdown