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/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:39:43,148 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:39:43,150 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:39:43,161 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:39:43,162 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:39:43,163 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:39:43,164 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:39:43,166 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:39:43,167 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:39:43,168 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:39:43,169 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:39:43,169 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:39:43,170 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:39:43,171 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:39:43,172 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:39:43,173 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:39:43,174 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:39:43,175 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:39:43,177 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:39:43,179 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:39:43,180 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:39:43,181 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:39:43,183 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:39:43,197 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 [2018-09-28 10:39:43,226 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:39:43,226 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:39:43,227 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:39:43,227 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:39:43,231 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:39:43,232 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:39:43,232 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:39:43,232 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:39:43,232 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:39:43,233 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:39:43,233 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:39:43,233 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:39:43,233 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:39:43,233 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:39:43,233 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:39:43,234 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:39:43,234 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:39:43,234 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:39:43,234 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:39:43,236 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:39:43,237 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:39:43,237 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:39:43,237 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:39:43,237 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:39:43,237 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:39:43,238 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:39:43,238 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:39:43,238 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:39:43,238 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:39:43,238 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:39:43,239 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:39:43,298 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:39:43,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:39:43,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:39:43,320 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:39:43,320 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:39:43,321 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-28 10:39:43,321 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-28 10:39:43,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:39:43,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:39:43,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:39:43,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:39:43,381 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:39:43,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,418 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:39:43,418 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:39:43,419 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:39:43,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:39:43,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:39:43,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:39:43,422 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:39:43,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/1) ... [2018-09-28 10:39:43,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:39:43,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:39:43,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:39:43,446 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:39:43,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (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 [2018-09-28 10:39:43,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:39:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:39:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:39:43,753 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:39:43,753 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:39:43 BoogieIcfgContainer [2018-09-28 10:39:43,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:39:43,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:39:43,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:39:43,759 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:39:43,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:39:43" (1/2) ... [2018-09-28 10:39:43,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26934584 and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:39:43, skipping insertion in model container [2018-09-28 10:39:43,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:39:43" (2/2) ... [2018-09-28 10:39:43,762 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-28 10:39:43,773 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:39:43,781 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:39:43,835 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:39:43,836 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:39:43,836 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:39:43,836 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:39:43,836 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:39:43,836 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:39:43,837 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:39:43,837 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:39:43,837 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:39:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-28 10:39:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:39:43,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:43,861 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:39:43,862 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:43,870 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:43,871 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-28 10:39:43,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:43,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:43,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:43,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:43,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,017 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:39:44,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:39:44,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:39:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:39:44,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:44,036 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-28 10:39:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:44,303 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-28 10:39:44,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:39:44,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:39:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:44,319 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:39:44,319 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:39:44,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:39:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-28 10:39:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:39:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-28 10:39:44,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-28 10:39:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:44,357 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-28 10:39:44,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:39:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-28 10:39:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:39:44,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:44,358 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:39:44,358 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:44,358 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:44,359 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-28 10:39:44,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:44,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:44,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:44,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:44,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:44,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:44,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:44,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:39:44,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:39:44,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:39:44,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:44,518 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-28 10:39:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:44,620 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-28 10:39:44,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:39:44,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-28 10:39:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:44,622 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:39:44,622 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:39:44,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:39:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-28 10:39:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:39:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-28 10:39:44,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-28 10:39:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:44,627 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-28 10:39:44,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:39:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-28 10:39:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:39:44,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:44,628 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:39:44,628 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:44,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-28 10:39:44,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:44,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:44,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:44,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:44,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:44,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:44,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:44,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:39:44,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:39:44,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:39:44,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:44,760 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-28 10:39:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:45,038 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-28 10:39:45,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:39:45,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-28 10:39:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:45,040 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:39:45,040 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:39:45,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:39:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-28 10:39:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:39:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-28 10:39:45,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-28 10:39:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:45,044 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-28 10:39:45,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:39:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-28 10:39:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:39:45,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:45,045 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-28 10:39:45,046 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:45,046 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-28 10:39:45,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:45,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:45,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:45,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:45,102 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 [2018-09-28 10:39:45,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:45,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:45,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:45,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:45,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:39:45,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:39:45,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:39:45,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:45,220 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-28 10:39:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:45,364 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-28 10:39:45,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:39:45,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:39:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:45,367 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:39:45,367 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:39:45,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:39:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-28 10:39:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:39:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-28 10:39:45,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-28 10:39:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:45,374 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-28 10:39:45,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:39:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-28 10:39:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:39:45,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:45,375 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-28 10:39:45,377 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:45,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-28 10:39:45,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:45,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:45,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:45,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:45,455 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 [2018-09-28 10:39:45,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:45,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:39:45,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:39:45,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:39:45,567 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:45,567 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-28 10:39:45,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:45,654 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-28 10:39:45,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:39:45,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:39:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:45,657 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:39:45,657 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:39:45,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:39:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-28 10:39:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:39:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-28 10:39:45,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-28 10:39:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:45,663 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-28 10:39:45,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:39:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-28 10:39:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:39:45,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:45,664 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-28 10:39:45,664 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:45,664 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:45,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-28 10:39:45,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:45,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:45,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:45,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:45,710 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 [2018-09-28 10:39:45,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:45,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:45,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:45,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:45,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:39:45,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:39:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:39:45,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:45,780 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-28 10:39:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:46,161 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-28 10:39:46,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:39:46,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:39:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:46,163 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:39:46,163 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:39:46,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:39:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-28 10:39:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:39:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:39:46,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-28 10:39:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:46,170 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:39:46,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:39:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:39:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:39:46,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:46,171 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-28 10:39:46,171 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:46,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:46,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-28 10:39:46,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:46,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:46,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:46,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:46,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:46,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:46,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:46,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:46,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:46,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:39:46,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:39:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:39:46,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:46,349 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-28 10:39:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:46,434 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-28 10:39:46,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:39:46,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:39:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:46,436 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:39:46,436 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:39:46,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:39:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-28 10:39:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:39:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-28 10:39:46,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-28 10:39:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:46,440 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-28 10:39:46,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:39:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-28 10:39:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:46,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:46,441 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-28 10:39:46,441 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:46,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-28 10:39:46,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:46,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:46,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:46,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:46,512 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 [2018-09-28 10:39:46,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:46,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:39:46,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:46,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:46,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:46,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:46,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:46,653 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-28 10:39:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:46,747 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-28 10:39:46,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:46,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:46,748 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:39:46,748 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:39:46,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:39:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-28 10:39:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:39:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:39:46,754 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-28 10:39:46,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:46,755 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:39:46,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:39:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:46,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:46,756 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:39:46,756 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:46,756 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-28 10:39:46,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:46,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:46,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:46,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:46,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:46,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:46,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:39:46,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:46,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:46,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:46,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:46,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:46,918 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-28 10:39:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:47,090 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-28 10:39:47,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:47,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:47,091 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:39:47,091 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:39:47,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:39:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-28 10:39:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:39:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:39:47,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-28 10:39:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:47,097 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:39:47,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:39:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:47,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:47,098 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:39:47,098 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:47,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-28 10:39:47,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:47,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:47,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:47,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:47,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:47,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:47,168 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 [2018-09-28 10:39:47,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:47,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:47,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:47,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:47,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:47,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:47,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:47,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:47,241 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-28 10:39:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:47,407 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-28 10:39:47,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:47,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:47,409 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:39:47,409 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:39:47,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:39:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-28 10:39:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:39:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:39:47,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-28 10:39:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:47,415 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:39:47,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:39:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:47,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:47,416 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:39:47,417 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:47,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-28 10:39:47,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:47,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:47,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:47,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:47,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:47,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:47,456 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 [2018-09-28 10:39:47,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:47,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:39:47,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:47,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:47,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:47,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:47,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:47,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:47,529 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-28 10:39:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:47,648 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-28 10:39:47,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:47,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:47,649 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:39:47,649 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:39:47,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:39:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-28 10:39:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:39:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:39:47,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-28 10:39:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:47,655 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:39:47,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:39:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:47,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:47,656 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:39:47,657 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:47,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:47,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-28 10:39:47,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:47,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:47,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:47,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:47,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:47,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:47,703 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 [2018-09-28 10:39:47,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:47,719 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:39:47,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:47,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:47,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:47,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:47,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:47,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:47,773 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-28 10:39:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:48,028 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:39:48,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:48,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:48,030 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:39:48,030 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:39:48,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:39:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-28 10:39:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:39:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:39:48,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-28 10:39:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:48,037 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:39:48,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:39:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:48,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:48,038 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:39:48,038 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:48,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-28 10:39:48,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:48,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:48,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:48,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:48,075 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 [2018-09-28 10:39:48,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:48,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:48,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:48,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:48,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:48,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:48,149 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-28 10:39:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:48,219 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:39:48,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:48,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:48,220 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:39:48,220 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:39:48,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:39:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-28 10:39:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:39:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:39:48,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-28 10:39:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:48,226 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:39:48,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:39:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:48,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:48,227 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:39:48,227 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:48,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-28 10:39:48,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:48,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:48,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:48,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:48,279 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 [2018-09-28 10:39:48,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:48,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:48,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:48,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:48,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:48,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:48,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:48,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:48,346 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-28 10:39:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:48,428 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-28 10:39:48,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:48,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:48,434 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:39:48,434 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:39:48,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:39:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-28 10:39:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:39:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:39:48,440 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-28 10:39:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:48,440 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:39:48,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:39:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:39:48,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:48,441 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-28 10:39:48,442 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:48,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:48,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-28 10:39:48,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:48,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:48,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:48,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:48,489 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 [2018-09-28 10:39:48,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:48,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:39:48,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:48,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:48,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:39:48,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:39:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:39:48,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:48,562 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-28 10:39:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:48,638 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-28 10:39:48,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:39:48,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:39:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:48,641 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:39:48,642 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:39:48,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:39:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-28 10:39:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:39:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:39:48,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-28 10:39:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:48,648 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:39:48,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:39:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:39:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:48,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:48,649 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-28 10:39:48,649 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:48,650 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-28 10:39:48,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:48,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:48,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:48,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:48,721 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 [2018-09-28 10:39:48,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:48,735 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:48,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:48,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:48,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:48,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:48,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:48,834 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-28 10:39:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:48,918 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:39:48,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:48,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:48,919 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:39:48,920 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:39:48,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:39:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-28 10:39:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:48,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:39:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:48,928 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:48,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:48,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:48,928 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:48,929 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:48,929 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-28 10:39:48,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:48,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:48,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:48,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:48,996 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 [2018-09-28 10:39:49,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:49,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:39:49,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:49,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:49,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:49,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:49,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:49,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:49,091 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:39:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:49,205 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:39:49,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:49,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:49,207 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:39:49,207 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:39:49,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:39:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-28 10:39:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:39:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:39:49,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-28 10:39:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:49,216 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:39:49,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:39:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:49,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:49,217 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:49,217 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:49,217 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:49,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-28 10:39:49,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:49,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:49,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:49,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:49,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:49,324 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 [2018-09-28 10:39:49,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:49,368 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:49,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:49,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:49,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:49,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:49,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:49,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:49,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:49,429 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-28 10:39:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:49,537 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:39:49,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:49,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:49,538 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:39:49,538 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:39:49,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:39:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-28 10:39:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:49,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:39:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:49,546 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:49,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:49,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:49,547 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:39:49,547 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:49,548 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:49,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-28 10:39:49,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:49,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:49,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:49,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:49,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:49,640 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 [2018-09-28 10:39:49,649 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:49,656 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-28 10:39:49,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:49,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:49,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:49,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:49,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:49,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:49,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:49,746 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:39:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:49,986 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-28 10:39:49,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:49,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:49,988 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:39:49,988 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:39:49,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:39:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-28 10:39:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:39:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:39:49,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-28 10:39:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:49,995 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:39:49,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:39:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:49,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:49,995 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:49,996 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:49,996 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-28 10:39:49,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:49,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:49,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:49,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:50,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:50,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:50,057 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-28 10:39:50,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:50,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:50,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:50,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:50,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:50,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:50,119 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-28 10:39:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:50,208 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:39:50,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:50,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:50,210 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:39:50,210 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:39:50,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:39:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-28 10:39:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:50,219 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:39:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:50,220 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:50,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:50,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:50,221 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:39:50,221 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:50,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:50,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-28 10:39:50,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:50,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:50,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:50,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:50,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:50,379 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 [2018-09-28 10:39:50,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:50,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:50,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:50,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:50,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:50,463 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:39:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:50,615 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:39:50,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:50,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:50,615 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:39:50,616 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:39:50,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:39:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-28 10:39:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:39:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:39:50,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-28 10:39:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:50,624 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:39:50,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:50,624 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:39:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:50,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:50,625 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:39:50,625 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:50,625 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-28 10:39:50,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:50,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:50,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:50,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:50,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:50,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:50,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:50,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:50,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:50,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:50,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:50,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:50,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:50,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:50,723 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-28 10:39:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:50,965 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:39:50,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:50,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:50,969 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:39:50,969 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:39:50,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:50,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:39:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-28 10:39:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:50,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:39:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:50,976 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:50,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:50,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:50,977 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:50,977 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:50,977 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-28 10:39:50,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:50,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:50,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:51,019 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 [2018-09-28 10:39:51,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:51,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:39:51,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:51,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:51,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:51,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:51,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:51,094 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:39:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:51,225 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-28 10:39:51,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:51,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:51,226 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:39:51,227 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:39:51,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:39:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-28 10:39:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:39:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:39:51,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-28 10:39:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:51,234 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:39:51,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:39:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:51,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:51,235 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:51,235 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:51,235 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-28 10:39:51,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:51,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:51,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:51,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:51,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:51,358 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 [2018-09-28 10:39:51,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:51,371 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:51,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:51,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:51,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:51,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:51,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:51,422 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-28 10:39:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:51,623 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:39:51,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:51,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:51,624 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:51,624 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:51,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:39:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:51,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:39:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:51,634 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:51,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:51,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:51,635 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:39:51,635 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:51,636 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:51,636 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-28 10:39:51,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:51,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:51,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:51,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:51,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:51,858 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 [2018-09-28 10:39:51,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:51,870 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-28 10:39:51,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:51,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:51,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:51,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:51,921 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:51,921 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:39:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:52,014 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:39:52,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:52,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:52,015 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:52,015 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:52,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-28 10:39:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:52,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:39:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:52,024 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:52,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:52,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:52,025 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:39:52,025 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:52,025 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-28 10:39:52,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:52,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:52,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:52,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:52,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:52,088 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 [2018-09-28 10:39:52,096 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:52,115 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-28 10:39:52,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:52,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:52,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:52,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:52,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:52,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:52,235 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:39:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:52,564 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:39:52,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:52,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:52,566 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:52,566 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:52,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:39:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:52,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:39:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:52,576 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:52,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:52,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:52,577 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:52,577 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:52,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:52,578 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-28 10:39:52,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:52,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:52,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:52,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:52,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:52,617 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 [2018-09-28 10:39:52,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:52,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:52,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:52,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:52,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:52,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:52,675 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:39:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:52,776 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:39:52,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:52,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:52,778 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:52,778 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:52,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-28 10:39:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:39:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:39:52,785 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-28 10:39:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:52,785 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:39:52,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:39:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:52,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:52,786 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:39:52,786 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:52,786 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-28 10:39:52,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:52,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:52,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:52,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:52,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:52,834 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 [2018-09-28 10:39:52,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:52,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:52,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:52,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:52,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:52,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:52,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:52,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:52,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:52,895 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-28 10:39:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:52,983 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:39:52,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:52,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:52,984 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:39:52,984 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:39:52,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:39:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-28 10:39:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:52,994 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:39:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:52,994 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:52,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:52,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:52,995 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:52,996 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:52,996 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-28 10:39:52,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:52,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:52,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:52,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:53,035 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 [2018-09-28 10:39:53,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:53,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:39:53,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:53,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:53,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:53,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:53,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:53,103 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:39:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:53,253 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:39:53,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:53,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:53,254 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:39:53,254 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:39:53,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:39:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-28 10:39:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:53,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:39:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:53,265 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:53,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:53,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:53,266 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:39:53,266 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:53,266 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-28 10:39:53,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:53,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:53,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:53,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:53,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:53,303 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 [2018-09-28 10:39:53,310 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:53,315 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:53,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:53,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:53,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:53,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:53,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:53,365 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:53,365 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:39:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:53,502 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:39:53,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:53,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:53,503 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:39:53,503 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:39:53,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:39:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-28 10:39:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:53,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:39:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:53,513 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:53,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:39:53,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:53,514 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-28 10:39:53,515 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:53,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-28 10:39:53,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:53,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:53,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:53,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:53,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:53,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:53,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:53,577 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:53,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:53,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:53,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:39:53,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:39:53,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:39:53,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:53,628 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:39:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:53,776 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-28 10:39:53,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:39:53,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:39:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:53,777 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:39:53,777 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:39:53,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:39:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-28 10:39:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:39:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:39:53,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-28 10:39:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:53,784 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:39:53,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:39:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:39:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:53,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:53,785 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-28 10:39:53,785 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:53,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-28 10:39:53,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:53,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:53,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:53,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:53,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:54,035 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 [2018-09-28 10:39:54,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:54,053 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:39:54,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:54,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:54,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:54,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:54,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:54,097 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-28 10:39:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:54,207 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:39:54,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:54,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:54,209 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:39:54,209 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:39:54,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:39:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:39:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:54,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:54,221 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:54,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:54,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:54,222 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:39:54,222 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:54,222 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:54,222 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-28 10:39:54,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:54,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:54,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:54,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:54,276 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 [2018-09-28 10:39:54,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:54,295 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:39:54,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:54,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:54,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:54,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:54,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:54,352 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:54,445 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:39:54,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:54,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:54,446 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:54,447 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:54,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:54,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:39:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:54,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:39:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:54,462 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:54,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:54,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:54,462 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:39:54,462 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:54,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-28 10:39:54,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:54,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:54,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:54,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:54,512 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 [2018-09-28 10:39:54,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:54,525 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:39:54,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:54,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:54,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:54,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:54,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:54,594 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:39:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:54,735 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:39:54,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:54,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:54,736 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:39:54,737 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:39:54,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:39:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:39:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:54,751 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:54,751 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:54,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:54,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:54,752 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:54,752 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:54,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-28 10:39:54,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:54,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:54,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:54,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:54,799 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) [2018-09-28 10:39:54,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:54,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:54,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:54,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:54,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:54,879 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:54,981 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:39:54,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:54,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:54,982 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:54,983 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:54,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-28 10:39:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:54,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-28 10:39:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:54,994 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:54,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:54,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:54,995 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:39:54,995 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:54,995 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-28 10:39:54,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:54,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:54,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:54,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:55,067 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 [2018-09-28 10:39:55,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:55,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:55,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:55,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:55,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:55,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:55,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:55,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:55,138 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-28 10:39:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:55,321 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:39:55,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:55,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:55,322 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:55,322 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:55,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-28 10:39:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:55,335 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:55,335 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:55,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:55,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:55,336 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:55,336 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:55,336 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-28 10:39:55,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:55,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:55,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:55,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:55,376 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 [2018-09-28 10:39:55,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:55,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:39:55,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:55,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:55,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:55,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:55,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:55,452 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:55,452 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:55,539 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:39:55,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:55,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:55,540 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:55,541 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:55,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-28 10:39:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:55,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:39:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:55,553 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:55,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:55,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:55,554 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:55,554 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:55,554 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-28 10:39:55,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:55,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:55,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:55,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:55,609 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 [2018-09-28 10:39:55,616 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:55,629 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:55,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:55,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:55,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:55,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:55,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:55,681 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:39:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:55,787 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:39:55,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:55,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:55,788 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:39:55,789 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:39:55,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:39:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-28 10:39:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:55,803 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:55,803 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:55,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:55,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:55,804 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:55,804 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:55,805 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-28 10:39:55,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:55,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:55,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:55,979 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 [2018-09-28 10:39:55,987 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:55,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:39:55,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:55,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:56,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:56,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:56,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:56,057 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:56,141 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-28 10:39:56,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:56,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:56,142 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:39:56,142 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:39:56,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:39:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-28 10:39:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:39:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:39:56,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-28 10:39:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:56,155 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:39:56,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:39:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:56,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:56,156 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:39:56,156 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:56,156 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-28 10:39:56,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:56,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:56,201 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 [2018-09-28 10:39:56,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:56,215 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:39:56,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:56,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:56,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:56,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:56,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:56,265 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:56,265 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-28 10:39:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:56,363 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:39:56,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:56,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:56,365 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:39:56,365 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:39:56,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:39:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:39:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:56,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:56,380 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:56,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:56,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:56,381 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:56,381 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:56,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-28 10:39:56,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:56,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:56,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:56,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:56,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:56,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:56,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:56,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:56,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:56,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:56,485 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:56,767 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:39:56,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:56,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:56,769 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:56,769 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:56,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:39:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:56,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:39:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:56,784 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:56,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:56,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:56,784 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:56,785 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:56,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-28 10:39:56,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:56,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:56,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:56,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:56,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:56,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:56,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:56,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:56,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:56,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:56,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:56,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:56,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:56,898 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:39:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:56,999 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:39:57,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:57,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:57,001 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:39:57,001 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:39:57,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:39:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:39:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:57,016 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:57,017 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:57,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:57,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:57,017 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:57,018 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:57,018 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:57,018 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-28 10:39:57,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:57,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:57,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:57,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:57,063 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 [2018-09-28 10:39:57,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:57,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:39:57,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:57,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:57,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:57,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:57,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:57,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:57,133 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:57,274 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:39:57,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:57,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:57,275 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:57,275 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:57,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-28 10:39:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:39:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:39:57,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-28 10:39:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:57,287 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:39:57,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:39:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:57,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:57,288 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:57,288 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:57,288 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-28 10:39:57,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:57,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:57,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:57,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:57,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:57,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:57,431 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:57,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:57,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:57,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:57,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:57,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:57,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:57,484 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-28 10:39:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:57,631 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:39:57,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:57,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:57,632 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:57,632 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:57,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-28 10:39:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:57,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:57,648 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:57,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:57,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:57,648 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:57,649 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:57,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-28 10:39:57,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:57,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:57,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:57,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:57,773 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 [2018-09-28 10:39:57,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:57,787 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:39:57,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:57,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:57,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:57,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:57,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:57,827 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:57,924 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:39:57,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:57,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:57,926 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:57,926 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:57,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-28 10:39:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:57,941 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:39:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:57,941 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:57,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:57,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:57,942 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:57,942 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:57,942 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-28 10:39:57,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:57,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:57,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:57,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:57,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:57,993 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 [2018-09-28 10:39:58,002 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:58,008 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:39:58,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:58,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:58,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:58,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:58,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:58,069 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:39:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:58,170 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:39:58,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:58,170 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:58,171 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:39:58,171 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:39:58,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:39:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-28 10:39:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:58,187 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:58,187 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:58,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:58,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:58,188 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:39:58,188 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:58,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-28 10:39:58,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:58,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:58,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:58,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:58,232 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 [2018-09-28 10:39:58,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:58,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:58,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:58,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:58,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:58,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:58,305 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:58,421 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-28 10:39:58,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:58,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:58,422 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:39:58,422 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:39:58,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:39:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-28 10:39:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:39:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:39:58,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-28 10:39:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:58,433 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:39:58,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:39:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:58,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:58,433 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:39:58,434 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:58,434 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-28 10:39:58,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:58,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:58,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:58,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:58,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:39:58,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:58,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:58,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:58,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:58,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:58,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:58,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:58,547 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-28 10:39:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:58,653 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:39:58,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:58,653 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:58,654 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:39:58,654 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:39:58,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:39:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-28 10:39:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:39:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:39:58,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:39:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:58,677 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:39:58,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:39:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:58,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:58,677 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:58,678 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:58,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-28 10:39:58,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:58,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:58,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:58,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:58,737 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 [2018-09-28 10:39:58,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:58,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:39:58,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:58,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:58,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:58,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:58,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:58,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:58,801 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:39:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:58,920 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:39:58,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:58,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:58,921 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:39:58,921 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:39:58,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:39:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-28 10:39:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:39:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:39:58,940 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:39:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:58,940 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:39:58,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:39:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:58,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:58,941 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:58,941 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:58,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-28 10:39:58,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:58,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:58,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:58,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:58,976 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 [2018-09-28 10:39:58,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:58,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:58,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:58,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:59,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:59,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:59,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:59,042 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:39:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:59,212 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:39:59,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:59,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:59,214 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:39:59,214 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:39:59,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:39:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-28 10:39:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:39:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:39:59,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:39:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:59,237 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:39:59,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:39:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:59,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:59,238 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:59,238 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:59,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-28 10:39:59,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:59,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:59,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:59,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:59,305 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 [2018-09-28 10:39:59,314 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:59,320 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:39:59,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:59,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:59,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:59,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:59,369 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:59,369 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:39:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:59,485 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:39:59,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:59,485 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:59,486 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:39:59,486 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:39:59,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:39:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-28 10:39:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:39:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:39:59,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:39:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:59,506 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:39:59,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:39:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:59,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:59,506 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:59,507 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:59,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-28 10:39:59,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:59,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:59,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:59,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:59,554 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 [2018-09-28 10:39:59,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:59,572 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:39:59,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:59,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:59,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:59,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:59,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:59,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:59,617 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:39:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:59,793 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:39:59,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:39:59,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:39:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:59,794 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:39:59,795 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:39:59,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:39:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-28 10:39:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:39:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:39:59,816 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:39:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:59,816 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:39:59,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:39:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:39:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:39:59,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:59,817 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:39:59,817 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:59,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-28 10:39:59,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:59,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:59,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:59,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:59,891 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 [2018-09-28 10:39:59,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:59,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:59,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:39:59,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:39:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:39:59,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:59,968 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:40:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:00,098 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:00,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:00,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:00,099 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:00,099 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:00,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-28 10:40:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:00,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:40:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:00,119 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:00,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:00,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:00,120 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:40:00,120 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:00,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-28 10:40:00,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:00,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:00,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:00,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:00,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:00,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:00,160 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 [2018-09-28 10:40:00,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:00,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:00,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:00,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:00,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:00,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:00,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:00,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:00,221 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:40:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:00,356 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:00,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:00,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:00,357 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:00,357 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:00,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:00,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-28 10:40:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:00,379 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:40:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:00,379 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:00,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:00,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:00,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:00,379 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:40:00,379 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:00,380 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-28 10:40:00,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:00,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:00,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:00,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:00,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:00,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:00,796 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 [2018-09-28 10:40:00,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:00,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:40:00,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:00,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:00,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:00,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:00,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:00,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:00,933 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:00,933 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:40:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:01,054 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:01,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:01,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:01,055 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:01,055 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:01,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-28 10:40:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:40:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:40:01,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-28 10:40:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:01,074 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:40:01,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:40:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:01,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:01,074 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:40:01,074 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:01,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-28 10:40:01,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:01,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:01,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:01,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:01,124 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 [2018-09-28 10:40:01,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:01,155 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:01,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:01,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:01,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:01,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:01,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:01,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:01,204 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-28 10:40:01,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:01,307 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:01,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:01,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:01,308 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:01,308 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:01,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:40:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:01,334 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:40:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:01,334 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:01,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:01,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:01,334 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:40:01,334 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:01,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-28 10:40:01,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:01,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:01,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:01,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:01,382 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 [2018-09-28 10:40:01,392 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:01,400 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:40:01,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:01,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:01,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:01,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:01,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:01,475 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:40:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:01,591 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:40:01,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:01,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:01,592 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:01,592 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:01,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:40:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:01,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:40:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:01,615 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:01,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:01,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:01,616 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:40:01,616 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:01,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:01,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-28 10:40:01,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:01,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:01,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:01,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:01,660 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 [2018-09-28 10:40:01,668 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:01,675 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:40:01,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:01,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:01,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:01,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:01,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:01,721 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:40:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:01,846 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:01,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:01,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:01,848 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:01,848 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:01,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:40:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:01,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:40:01,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:01,872 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:01,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:01,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:01,873 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:40:01,873 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:01,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-28 10:40:01,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:01,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:01,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:01,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:01,940 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 [2018-09-28 10:40:01,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:01,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:02,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:02,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:02,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:02,037 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:40:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:02,256 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:40:02,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:02,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:02,257 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:02,258 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:02,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-28 10:40:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:40:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:40:02,278 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:40:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:02,278 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:40:02,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:40:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:02,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:02,279 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:40:02,279 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:02,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-28 10:40:02,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:02,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:02,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:02,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:02,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:02,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:02,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:02,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:02,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:02,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:02,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:02,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:02,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:02,410 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:40:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:02,585 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:40:02,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:02,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:02,585 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:40:02,585 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:40:02,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:40:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-28 10:40:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:02,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:40:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:02,610 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:02,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:02,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:02,611 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:40:02,611 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:02,611 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:02,611 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-28 10:40:02,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:02,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:02,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:02,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:02,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:02,651 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 [2018-09-28 10:40:02,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:02,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:40:02,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:02,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:02,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:02,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:02,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:02,721 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:40:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:02,847 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:40:02,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:02,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:02,848 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:40:02,848 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:40:02,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:40:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-28 10:40:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:02,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:40:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:02,872 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:02,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:02,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:02,872 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:40:02,872 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:02,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-28 10:40:02,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:02,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:02,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:02,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:02,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:02,904 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 [2018-09-28 10:40:02,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:02,916 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:02,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:02,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:02,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:02,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:02,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:02,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:02,973 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:40:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:03,080 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:40:03,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:03,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:03,082 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:40:03,082 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:40:03,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:40:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-28 10:40:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:03,107 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:40:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:03,108 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:03,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:40:03,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:03,108 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-28 10:40:03,108 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:03,108 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-28 10:40:03,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:03,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:03,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:03,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:03,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:03,166 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 [2018-09-28 10:40:03,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:03,183 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:40:03,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:03,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:03,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:03,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:40:03,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:40:03,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:40:03,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:03,246 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:40:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:03,349 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-28 10:40:03,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:40:03,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:40:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:03,350 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:40:03,350 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:40:03,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:40:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-28 10:40:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:40:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:40:03,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-28 10:40:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:03,368 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:40:03,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:40:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:40:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:03,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:03,368 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-28 10:40:03,369 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:03,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-28 10:40:03,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:03,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:03,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:03,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:03,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:03,416 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 [2018-09-28 10:40:03,426 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:03,434 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:03,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:03,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:03,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:03,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:03,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:03,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:03,497 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-28 10:40:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:03,648 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:03,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:03,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:03,649 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:03,649 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:03,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:40:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:03,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:03,684 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:03,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:03,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:03,685 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:03,685 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:03,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-28 10:40:03,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:03,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:03,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:03,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:03,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:03,781 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 [2018-09-28 10:40:03,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:03,796 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:03,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:03,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:03,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:03,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:03,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:03,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:03,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:03,840 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:03,997 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:03,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:03,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:03,998 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:03,998 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:03,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:40:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:04,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:04,028 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:04,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:04,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:04,029 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:04,029 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:04,029 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-28 10:40:04,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:04,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:04,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:04,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:04,083 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 [2018-09-28 10:40:04,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:04,098 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:04,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:04,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:04,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:04,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:04,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:04,151 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:04,329 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:04,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:04,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:04,330 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:04,331 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:04,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:04,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:40:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:04,368 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:04,369 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:04,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:04,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:04,369 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:04,369 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:04,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:04,370 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-28 10:40:04,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:04,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:04,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:04,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:04,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:04,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:04,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:04,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:04,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:04,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:04,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:04,576 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:04,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:04,749 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:04,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:04,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:04,750 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:04,750 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:04,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-28 10:40:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:04,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:40:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:04,780 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:04,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:04,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:04,781 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:04,781 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:04,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-28 10:40:04,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:04,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:04,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:04,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:04,830 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 [2018-09-28 10:40:04,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:04,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:04,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:04,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:04,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:04,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:04,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:04,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:04,903 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:40:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:05,062 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:05,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:05,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:05,063 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:05,064 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:05,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:40:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:05,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:05,098 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:05,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:05,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:05,099 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:05,099 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:05,099 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:05,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-28 10:40:05,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:05,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:05,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:05,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:05,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:05,137 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 [2018-09-28 10:40:05,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:05,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:05,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:05,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:05,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:05,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:05,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:05,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:05,266 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:05,423 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:05,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:05,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:05,424 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:05,425 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:05,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:40:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:05,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:05,458 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:05,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:05,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:05,458 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:05,458 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:05,458 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:05,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-28 10:40:05,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:05,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:05,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:05,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:05,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:05,497 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 [2018-09-28 10:40:05,506 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:05,511 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:05,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:05,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:05,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:05,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:05,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:05,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:05,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:05,576 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:05,727 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:05,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:05,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:05,728 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:05,728 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:05,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:40:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:05,763 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:05,763 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:05,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:05,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:05,764 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:05,764 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:05,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:05,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-28 10:40:05,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:05,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:05,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:05,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:06,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:06,227 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 [2018-09-28 10:40:06,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:06,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:06,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:06,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:06,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:06,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:06,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:06,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:06,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:06,333 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:06,490 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:06,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:06,491 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:06,491 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:06,492 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:06,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:06,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-28 10:40:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:40:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:40:06,520 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-28 10:40:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:06,521 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:40:06,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:40:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:06,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:06,521 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:06,521 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:06,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-28 10:40:06,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:06,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:06,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:06,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:06,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:06,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:06,560 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 [2018-09-28 10:40:06,568 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:06,575 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:06,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:06,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:06,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:06,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:06,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:06,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:06,627 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-28 10:40:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:06,777 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:06,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:06,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:06,777 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:06,778 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:06,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:40:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:06,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:06,814 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:06,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:06,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:06,815 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:06,815 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:06,815 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-28 10:40:06,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:06,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:06,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:06,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:06,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:07,047 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 [2018-09-28 10:40:07,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:07,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:07,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:07,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:07,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:07,115 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:07,251 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:07,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:07,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:07,252 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:07,253 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:07,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:40:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:07,288 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:07,289 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:07,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:07,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:07,289 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:07,289 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:07,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-28 10:40:07,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:07,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:07,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:07,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:07,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:07,341 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 [2018-09-28 10:40:07,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:07,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:07,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:07,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:07,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:07,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:07,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:07,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:07,424 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:07,641 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:07,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:07,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:07,641 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:07,642 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:07,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:40:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:07,676 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:07,676 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:07,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:07,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:07,676 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:07,677 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:07,677 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:07,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-28 10:40:07,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:07,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:07,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:07,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:07,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:07,787 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 [2018-09-28 10:40:07,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:07,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:07,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:07,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:07,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:07,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:07,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:07,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:07,883 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:08,021 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:08,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:08,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:08,023 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:08,023 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:08,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-28 10:40:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:08,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:40:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:08,054 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:08,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:08,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:08,055 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:08,055 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:08,055 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:08,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-28 10:40:08,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:08,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:08,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:08,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:08,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:08,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:08,325 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 [2018-09-28 10:40:08,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:08,337 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:08,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:08,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:08,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:08,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:08,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:08,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:08,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:08,387 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:40:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:08,516 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:40:08,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:08,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:08,517 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:08,517 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:08,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-28 10:40:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:08,554 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:08,554 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:08,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:08,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:08,555 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:08,555 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:08,555 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-28 10:40:08,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:08,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:08,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:08,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:08,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:08,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:08,610 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 [2018-09-28 10:40:08,619 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:08,628 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:08,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:08,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:08,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:08,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:08,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:08,670 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:08,670 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:08,824 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:40:08,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:08,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:08,825 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:08,825 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:08,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-28 10:40:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:08,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:08,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:08,862 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:08,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:08,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:08,862 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:08,862 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:08,862 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:08,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-28 10:40:08,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:08,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:08,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:08,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:08,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:08,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:08,903 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 [2018-09-28 10:40:08,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:08,918 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:08,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:08,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:08,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:08,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:08,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:08,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:08,976 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:09,122 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:40:09,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:09,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:09,123 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:40:09,123 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:40:09,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:40:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-28 10:40:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:09,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:09,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:09,160 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:09,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:09,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:09,161 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:09,161 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:09,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-28 10:40:09,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:09,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:09,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:09,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:09,209 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 [2018-09-28 10:40:09,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:09,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:09,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:09,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:09,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:09,277 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:09,403 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-28 10:40:09,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:09,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:09,404 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:40:09,405 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:40:09,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:40:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-28 10:40:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:40:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:40:09,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-28 10:40:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:09,430 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:40:09,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:40:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:09,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:09,430 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:09,431 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:09,431 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:09,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-28 10:40:09,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:09,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:09,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:09,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:09,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:09,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:09,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:09,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:09,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:09,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:09,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:09,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:09,607 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-28 10:40:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:09,809 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:09,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:09,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:09,810 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:09,810 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:09,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:40:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:09,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:09,865 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:09,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:09,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:09,865 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:09,865 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:09,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:09,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-28 10:40:09,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:09,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:09,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:09,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:09,912 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 [2018-09-28 10:40:09,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:09,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:09,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:09,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:09,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:09,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:09,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:09,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:09,973 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:10,157 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:10,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:10,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:10,158 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:10,158 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:10,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:40:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:10,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:10,200 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:10,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:10,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:10,200 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:10,200 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:10,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-28 10:40:10,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:10,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:10,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:10,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:10,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:10,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:10,292 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 [2018-09-28 10:40:10,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:10,305 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:10,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:10,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:10,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:10,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:10,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:10,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:10,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:10,363 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:10,538 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:10,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:10,538 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:10,539 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:10,539 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:10,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:40:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:10,584 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:10,584 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:10,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:10,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:10,584 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:10,584 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:10,585 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-28 10:40:10,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:10,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:10,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:10,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:10,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:10,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:10,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:10,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:10,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:10,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:10,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:10,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:10,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:10,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:10,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:10,697 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:11,009 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:11,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:11,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:11,010 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:11,010 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:11,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-28 10:40:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:11,049 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:40:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:11,049 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:11,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:11,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:11,049 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:11,050 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:11,050 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-28 10:40:11,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:11,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:11,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:11,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:11,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:11,095 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 [2018-09-28 10:40:11,104 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:11,114 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:11,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:11,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:11,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:11,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:11,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:11,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:11,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:11,172 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:40:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:11,349 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:11,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:11,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:11,350 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:11,350 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:11,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:40:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:11,398 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:11,398 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:11,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:11,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:11,398 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:11,399 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:11,399 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-28 10:40:11,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:11,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:11,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:11,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:11,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:11,454 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 [2018-09-28 10:40:11,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:11,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:11,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:11,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:11,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:11,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:11,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:11,530 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:11,719 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:11,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:11,719 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:11,720 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:11,720 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:11,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:40:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:11,763 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:11,764 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:11,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:11,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:11,764 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:11,765 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:11,765 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-28 10:40:11,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:11,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:11,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:11,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:11,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:11,833 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 [2018-09-28 10:40:11,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:11,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:11,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:11,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:11,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:11,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:11,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:11,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:11,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:11,897 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:12,084 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:12,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:12,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:12,085 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:12,086 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:12,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:40:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:12,129 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:12,129 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:12,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:12,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:12,130 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:12,130 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:12,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:12,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-28 10:40:12,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:12,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:12,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:12,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:12,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:12,174 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 [2018-09-28 10:40:12,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:12,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:12,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:12,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:12,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:12,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:12,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:12,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:12,241 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:12,419 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:12,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:12,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:12,420 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:12,420 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:12,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-28 10:40:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:40:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:40:12,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-28 10:40:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:12,451 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:40:12,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:40:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:12,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:12,451 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:12,451 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:12,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-28 10:40:12,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:12,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:12,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:12,490 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 [2018-09-28 10:40:12,500 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:12,511 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:12,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:12,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:12,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:12,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:12,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:12,574 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-28 10:40:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:12,801 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:12,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:12,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:12,802 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:12,802 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:12,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:40:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:12,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:12,849 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:12,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:12,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:12,850 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:12,850 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:12,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:12,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-28 10:40:12,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:12,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:12,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:12,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:12,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:12,916 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 [2018-09-28 10:40:12,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:12,949 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:12,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:12,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:12,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:12,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:12,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:12,998 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:13,172 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:13,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:13,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:13,174 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:13,174 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:13,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:40:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:13,220 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:13,221 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:13,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:13,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:13,221 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:13,221 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:13,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-28 10:40:13,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:13,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:13,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:13,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:13,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:13,268 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 [2018-09-28 10:40:13,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:13,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:13,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:13,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:13,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:13,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:13,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:13,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:13,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:13,343 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:13,515 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:13,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:13,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:13,516 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:13,516 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:13,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:40:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:13,582 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:13,582 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:13,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:13,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:13,583 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:13,583 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:13,583 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-28 10:40:13,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:13,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:13,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:13,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:13,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:13,661 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 [2018-09-28 10:40:13,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:13,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:13,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:13,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:13,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:13,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:13,721 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:13,914 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:13,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:13,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:13,915 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:13,915 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:13,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-28 10:40:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:13,953 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:40:13,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:13,954 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:13,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:13,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:13,954 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:13,955 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:13,955 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-28 10:40:13,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:13,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:13,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:13,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:14,134 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 [2018-09-28 10:40:14,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:14,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:14,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:14,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:14,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:14,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:14,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:14,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:14,193 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:40:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:14,367 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:40:14,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:14,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:14,369 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:14,369 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:14,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-28 10:40:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:14,422 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:14,422 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:14,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:14,422 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:14,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:14,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:14,422 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:14,423 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:14,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-28 10:40:14,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:14,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:14,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:14,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:14,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:14,466 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 [2018-09-28 10:40:14,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:14,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:14,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:14,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:14,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:14,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:14,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:14,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:14,557 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:14,720 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:40:14,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:14,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:14,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:14,721 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:14,722 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:14,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-28 10:40:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:14,772 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:14,773 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:14,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:14,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:14,773 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:14,773 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:14,773 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-28 10:40:14,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:14,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:14,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:14,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:14,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:14,829 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 [2018-09-28 10:40:14,837 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:14,842 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:14,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:14,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:14,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:14,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:14,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:14,888 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:15,036 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:40:15,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:15,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:15,037 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:40:15,037 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:40:15,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:40:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-28 10:40:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:15,083 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:15,083 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:15,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:15,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:15,084 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:15,084 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:15,084 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-28 10:40:15,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:15,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:15,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:15,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:15,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:15,244 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 [2018-09-28 10:40:15,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:15,259 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:15,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:15,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:15,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:15,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:15,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:15,300 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:15,300 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:15,448 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-28 10:40:15,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:15,448 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:15,449 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:40:15,449 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:40:15,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:40:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-28 10:40:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:40:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:40:15,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-28 10:40:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:15,480 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:40:15,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:40:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:15,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:15,481 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:15,481 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:15,481 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-28 10:40:15,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:15,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:15,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:15,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:15,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:15,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:15,637 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:15,645 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:15,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:15,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:15,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:15,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:15,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:15,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:15,715 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-28 10:40:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:15,942 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:15,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:15,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:15,943 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:15,943 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:15,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:15,997 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:15,997 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:15,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:15,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:15,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:15,998 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:15,998 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:15,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:15,998 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-28 10:40:15,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:15,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:15,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:15,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:16,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:16,043 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 [2018-09-28 10:40:16,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:16,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:16,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:16,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:16,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:16,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:16,103 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:16,339 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:16,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:16,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:16,340 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:16,340 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:16,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:16,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-28 10:40:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:16,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:16,395 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:16,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:16,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:16,396 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:16,396 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:16,396 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:16,396 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-28 10:40:16,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:16,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:16,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:16,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:16,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:16,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:16,508 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 [2018-09-28 10:40:16,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:16,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:16,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:16,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:16,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:16,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:16,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:16,568 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:16,568 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:16,803 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:16,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:16,804 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:16,804 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:16,804 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:16,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:16,861 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:16,861 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:16,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:16,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:16,862 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:16,862 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:16,862 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-28 10:40:16,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:16,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:16,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:16,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:16,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:16,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:16,919 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 [2018-09-28 10:40:16,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:16,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:16,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:16,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:16,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:16,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:16,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:16,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:16,997 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:16,997 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:17,403 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:17,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:17,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:17,404 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:17,404 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:17,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-28 10:40:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:17,489 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:17,489 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:17,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:17,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:17,490 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:17,490 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:17,491 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-28 10:40:17,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:17,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:17,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:17,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:17,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:18,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:18,004 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 [2018-09-28 10:40:18,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:18,047 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:18,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:18,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:18,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:18,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:18,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:18,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:18,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:18,510 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:19,465 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:19,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:19,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:19,466 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:19,466 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:19,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:40:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:19,530 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:19,530 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:19,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:19,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:19,530 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:19,531 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:19,531 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-28 10:40:19,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:19,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:19,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:19,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:19,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:19,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:19,594 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 [2018-09-28 10:40:19,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:19,610 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:19,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:19,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:19,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:19,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:19,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:19,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:19,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:19,660 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:19,891 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:19,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:19,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:19,892 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:19,892 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:19,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-28 10:40:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:19,950 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:19,950 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:19,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:19,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:19,950 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:19,951 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:19,951 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-28 10:40:19,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:19,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:19,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:19,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:20,045 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 [2018-09-28 10:40:20,053 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:20,060 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:20,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:20,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:20,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:20,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:20,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:20,140 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:20,351 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:20,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:20,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:20,353 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:20,353 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:20,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:40:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:20,412 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:20,412 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:20,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:20,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:20,412 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:20,413 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:20,413 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-28 10:40:20,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:20,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:20,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:20,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:20,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:20,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:20,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:20,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:20,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:20,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:20,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:20,533 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:20,738 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:20,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:20,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:20,739 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:20,739 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:20,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-28 10:40:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:20,787 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:40:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:20,787 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:20,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:20,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:20,788 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:20,788 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:20,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:20,788 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-28 10:40:20,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:20,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:20,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:20,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:20,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:20,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:20,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:20,846 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:20,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:20,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:20,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:20,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:20,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:20,898 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:40:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:21,192 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:21,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:21,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:21,193 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:21,193 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:21,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:21,257 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:21,257 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:21,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:21,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:21,258 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:21,258 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:21,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-28 10:40:21,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:21,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:21,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:21,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:21,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:21,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:21,319 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 [2018-09-28 10:40:21,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:21,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:21,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:21,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:21,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:21,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:21,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:21,378 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:21,379 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:21,785 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:21,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:21,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:21,786 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:21,786 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:21,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-28 10:40:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:21,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:21,881 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:21,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:21,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:21,881 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:21,882 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:21,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:21,882 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-28 10:40:21,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:21,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:21,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:21,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:21,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:22,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:22,003 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 [2018-09-28 10:40:22,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:22,020 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:22,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:22,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:22,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:22,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:22,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:22,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:22,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:22,078 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:22,310 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:22,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:22,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:22,311 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:22,312 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:22,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:22,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:22,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:22,374 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:22,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:22,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:22,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:22,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:22,374 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:22,374 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:22,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:22,375 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-28 10:40:22,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:22,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:22,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:22,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:22,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:22,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:22,528 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 [2018-09-28 10:40:22,536 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:22,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:22,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:22,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:22,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:22,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:22,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:22,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:22,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:22,608 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:22,850 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:22,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:22,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:22,851 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:22,851 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:22,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-28 10:40:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:22,906 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:22,906 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:22,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:22,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:22,906 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:22,906 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:22,906 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:22,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-28 10:40:22,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:22,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:22,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:22,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:22,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:22,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:22,971 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 [2018-09-28 10:40:22,979 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:22,989 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:22,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:22,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:23,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:23,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:23,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:23,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:23,053 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:23,303 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:23,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:23,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:23,304 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:23,304 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:23,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:40:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:23,368 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:23,368 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:23,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:23,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:23,369 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:23,369 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:23,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-28 10:40:23,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:23,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:23,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:23,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:23,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:23,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:23,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:23,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:23,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:23,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:23,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:23,511 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:23,748 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:23,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:23,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:23,749 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:23,749 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:23,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-28 10:40:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:23,811 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:23,811 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:23,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:23,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:23,812 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:23,812 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:23,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-28 10:40:23,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:23,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:23,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:23,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:23,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:23,858 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 [2018-09-28 10:40:23,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:23,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:23,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:23,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:23,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:23,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:23,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:23,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:23,932 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:24,161 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:24,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:24,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:24,161 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:24,161 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:24,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:40:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:24,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:24,225 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:24,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:24,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:24,226 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:24,226 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:24,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-28 10:40:24,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:24,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:24,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:24,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:24,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:24,271 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 [2018-09-28 10:40:24,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:24,288 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:24,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:24,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:24,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:24,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:24,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:24,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:24,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:24,351 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:24,565 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:24,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:24,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:24,566 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:24,566 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:24,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-28 10:40:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:40:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:40:24,612 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-28 10:40:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:24,612 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:40:24,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:40:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:24,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:24,613 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:24,613 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:24,613 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-28 10:40:24,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:24,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:24,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:24,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:24,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:24,656 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 [2018-09-28 10:40:24,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:24,668 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:24,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:24,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:24,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:24,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:24,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:24,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:24,729 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-28 10:40:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:24,983 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:24,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:24,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:24,984 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:24,984 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:24,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:40:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:25,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:25,059 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:25,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:25,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:25,060 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:25,060 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:25,060 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-28 10:40:25,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:25,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:25,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:25,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:25,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:25,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:25,117 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 [2018-09-28 10:40:25,127 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:25,135 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:25,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:25,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:25,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:25,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:25,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:25,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:25,192 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:25,436 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:25,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:25,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:25,437 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:25,437 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:25,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:25,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-28 10:40:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:25,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:25,504 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:25,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:25,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:25,505 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:25,505 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:25,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-28 10:40:25,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:25,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:25,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:25,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:25,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:25,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:25,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:25,561 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:25,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:25,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:25,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:25,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:25,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:25,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:25,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:25,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:25,619 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:25,866 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:25,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:25,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:25,867 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:25,867 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:25,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-28 10:40:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:25,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:25,948 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:25,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:25,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:25,949 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:25,949 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:25,949 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-28 10:40:25,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:25,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:25,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:25,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:25,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:26,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:26,011 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 [2018-09-28 10:40:26,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:26,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:26,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:26,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:26,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:26,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:26,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:26,082 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:26,311 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:26,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:26,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:26,312 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:26,312 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:26,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-28 10:40:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:26,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:26,375 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:26,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:26,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:26,376 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:26,376 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:26,376 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-28 10:40:26,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:26,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:26,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:26,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:26,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:26,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:26,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:26,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:26,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:26,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:26,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:26,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:26,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:26,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:26,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:26,485 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:26,709 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:26,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:26,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:26,710 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:26,710 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:26,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:40:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:26,777 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:26,777 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:26,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:26,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:26,778 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:26,778 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:26,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:26,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-28 10:40:26,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:26,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:26,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:26,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:26,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:26,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:26,827 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 [2018-09-28 10:40:26,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:26,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:26,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:26,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:26,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:26,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:26,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:26,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:26,899 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:27,139 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:27,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:27,139 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:27,139 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:27,139 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:27,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-28 10:40:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:27,208 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:27,209 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:27,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:27,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:27,209 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:27,209 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:27,209 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-28 10:40:27,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:27,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:27,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:27,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:27,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:27,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:27,317 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 [2018-09-28 10:40:27,325 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:27,330 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:27,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:27,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:27,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:27,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:27,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:27,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:27,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:27,377 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:27,602 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:27,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:27,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:27,603 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:27,603 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:27,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-28 10:40:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:27,672 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:27,672 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:27,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:27,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:27,673 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:27,673 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:27,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-28 10:40:27,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:27,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:27,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:27,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:27,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:27,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:27,715 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 [2018-09-28 10:40:27,722 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:27,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:27,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:27,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:27,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:27,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:27,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:27,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:27,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:27,953 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:29,213 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:29,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:29,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:29,214 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:29,214 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:29,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-28 10:40:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:29,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:40:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:29,269 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:29,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:29,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:29,270 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:40:29,270 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:29,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:29,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-28 10:40:29,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:29,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:29,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:29,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:29,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:29,310 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 [2018-09-28 10:40:29,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:29,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:29,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:29,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:29,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:29,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:29,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:29,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:29,385 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:40:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:29,604 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:29,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:29,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:29,605 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:29,606 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:29,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:40:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:29,676 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:29,677 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:29,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:29,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:29,677 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:29,677 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:29,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-28 10:40:29,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:29,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:29,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:29,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:29,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:29,863 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 [2018-09-28 10:40:29,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:29,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:29,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:29,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:29,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:29,925 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:29,925 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:30,133 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:30,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:30,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:30,134 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:30,134 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:30,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:30,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:40:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:30,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:30,241 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:30,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:30,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:30,241 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:30,241 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:30,242 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:30,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-28 10:40:30,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:30,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:30,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:30,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:30,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:30,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:30,568 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 [2018-09-28 10:40:30,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:30,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:30,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:30,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:30,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:30,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:30,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:30,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:30,687 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:30,912 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:30,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:30,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:30,913 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:30,913 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:30,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:40:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:30,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:30,983 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:30,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:30,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:30,984 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:30,984 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:30,984 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-28 10:40:30,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:30,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:30,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:30,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:30,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:31,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:31,086 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 [2018-09-28 10:40:31,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:31,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:40:31,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:31,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:31,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:31,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:31,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:31,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:31,156 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:31,375 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:31,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:31,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:31,376 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:31,376 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:31,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-28 10:40:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:31,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:40:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:31,443 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:31,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:31,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:31,444 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:40:31,444 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:31,444 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-28 10:40:31,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:31,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:31,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:31,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:31,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:31,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:31,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:31,495 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:31,502 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:31,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:31,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:31,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:31,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:31,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:31,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:31,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:31,556 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:40:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:31,770 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:31,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:31,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:31,771 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:31,771 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:31,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-28 10:40:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:31,844 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:31,845 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:31,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:31,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:31,845 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:31,845 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:31,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-28 10:40:31,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:31,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:31,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:31,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:31,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:31,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:31,891 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 [2018-09-28 10:40:31,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:31,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:40:31,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:31,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:31,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:31,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:31,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:31,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:31,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:31,956 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:32,168 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:32,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:32,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:32,170 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:32,170 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:32,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-28 10:40:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:32,238 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:40:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:32,238 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:32,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:32,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:32,239 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:40:32,239 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:32,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:32,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-28 10:40:32,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:32,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:32,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:32,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:32,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:32,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:32,298 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 [2018-09-28 10:40:32,306 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:32,314 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:32,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:32,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:32,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:32,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:32,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:32,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:32,359 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:40:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:32,547 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:40:32,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:32,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:32,548 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:40:32,549 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:40:32,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:40:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-28 10:40:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:32,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:40:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:32,638 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:32,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:40:32,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:32,639 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-28 10:40:32,639 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:32,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:32,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-28 10:40:32,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:32,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:32,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:32,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:32,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:32,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:32,703 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 [2018-09-28 10:40:32,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:32,717 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:40:32,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:32,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:32,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:32,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:40:32,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:40:32,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:40:32,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:32,773 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:40:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:32,945 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-28 10:40:32,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:40:32,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:40:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:32,946 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:40:32,946 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:40:32,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:40:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-28 10:40:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:40:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:40:33,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-28 10:40:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:33,003 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:40:33,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:40:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:40:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:33,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:33,004 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-28 10:40:33,004 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:33,004 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:33,004 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-28 10:40:33,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:33,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:33,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:33,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:33,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:33,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:33,246 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 [2018-09-28 10:40:33,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:33,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:33,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:33,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:33,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:33,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:33,329 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-28 10:40:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:33,797 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:33,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:33,798 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:33,798 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:33,799 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:33,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:33,894 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:33,895 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:33,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:33,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:33,895 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:40:33,896 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:33,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:33,896 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-28 10:40:33,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:33,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:33,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:33,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:33,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:33,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:33,959 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 [2018-09-28 10:40:33,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:33,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:34,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:34,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:34,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:34,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:34,024 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:34,344 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:34,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:34,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:34,345 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:34,345 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:34,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:34,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:34,446 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:34,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:34,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:34,446 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:40:34,447 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:34,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:34,447 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-28 10:40:34,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:34,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:34,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:34,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:34,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:34,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:34,494 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 [2018-09-28 10:40:34,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:34,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:34,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:34,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:34,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:34,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:34,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:34,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:34,572 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:34,896 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:34,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:34,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:34,897 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:34,897 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:34,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:34,986 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:34,986 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:34,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:34,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:34,986 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:34,987 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:34,987 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:34,987 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-28 10:40:34,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:34,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:34,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:34,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:34,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:35,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:35,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:35,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:35,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:40:35,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:35,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:35,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:35,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:35,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:35,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:35,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:35,109 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:35,415 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:35,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:35,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:35,416 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:35,416 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:35,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:40:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:35,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:40:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:35,505 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:35,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:35,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:35,505 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:40:35,505 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:35,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-28 10:40:35,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:35,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:35,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:35,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:35,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:35,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:35,551 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 [2018-09-28 10:40:35,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:35,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:35,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:35,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:35,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:35,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:35,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:35,631 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:35,631 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:40:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:35,926 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:35,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:35,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:35,927 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:35,927 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:35,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:40:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:36,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:36,026 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:36,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:36,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:36,026 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:36,026 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:36,026 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-28 10:40:36,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:36,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:36,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:36,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:36,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:36,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:36,115 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 [2018-09-28 10:40:36,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:36,133 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:40:36,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:36,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:36,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:36,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:36,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:36,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:36,177 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:36,495 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:36,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:36,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:36,496 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:36,496 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:36,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:36,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:40:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:36,604 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:36,604 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:36,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:36,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:36,605 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:36,605 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:36,605 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-28 10:40:36,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:36,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:36,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:36,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:36,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:36,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:36,663 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 [2018-09-28 10:40:36,670 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:36,679 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:40:36,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:36,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:36,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:36,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:36,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:36,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:36,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:36,728 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:37,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:37,025 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:37,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:37,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:37,026 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:37,026 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:37,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:40:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:37,124 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:37,124 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:37,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:37,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:37,125 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:37,125 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:37,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:37,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-28 10:40:37,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:37,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:37,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:37,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:37,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:37,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:37,174 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 [2018-09-28 10:40:37,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:37,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:37,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:37,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:37,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:37,239 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:37,239 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:37,518 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:37,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:37,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:37,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:37,519 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:37,519 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:37,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-28 10:40:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:37,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:40:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:37,598 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:37,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:37,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:37,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:37,599 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:40:37,599 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:37,599 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-28 10:40:37,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:37,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:37,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:37,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:37,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:37,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:37,663 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 [2018-09-28 10:40:37,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:37,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:37,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:37,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:37,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:37,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:37,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:37,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:37,729 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:40:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:38,055 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:38,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:38,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:38,056 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:38,056 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:38,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:38,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:38,158 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:38,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:38,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:38,159 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:38,159 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:38,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:38,159 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-28 10:40:38,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:38,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:38,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:38,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:38,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:38,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:38,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:38,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:38,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:40:38,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:38,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:38,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:38,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:38,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:38,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:38,313 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:38,683 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:38,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:38,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:38,684 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:38,684 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:38,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:38,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:38,776 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:38,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:38,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:38,776 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:38,776 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:38,776 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-28 10:40:38,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:38,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:38,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:38,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:38,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:38,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:38,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:38,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:38,845 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:38,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:38,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:38,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:38,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:38,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:38,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:38,893 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:39,226 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:39,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:39,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:39,227 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:39,227 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:39,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:39,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:39,327 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:39,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:39,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:39,327 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:39,327 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:39,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-28 10:40:39,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:39,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:39,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:39,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:39,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:39,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:39,378 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 [2018-09-28 10:40:39,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:39,395 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:40:39,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:39,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:39,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:39,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:39,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:39,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:39,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:39,501 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:39,831 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:39,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:39,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:39,832 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:39,832 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:39,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:40:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:39,921 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:40:39,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:39,922 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:39,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:39,922 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:39,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:39,922 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:39,922 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:39,922 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-28 10:40:39,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:39,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:39,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:39,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:39,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:40,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:40,100 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 [2018-09-28 10:40:40,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:40,118 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:40:40,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:40,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:40,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:40,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:40,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:40,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:40,176 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:40:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:40,485 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:40,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:40,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:40,485 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:40,486 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:40,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:40:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:40,580 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:40,580 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:40,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:40,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:40,581 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:40,581 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:40,581 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-28 10:40:40,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:40,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:40,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:40,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:40,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:41,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:41,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:41,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:41,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:41,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:41,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:41,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:41,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:41,585 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:41,585 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:41,904 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:41,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:41,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:41,905 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:41,905 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:41,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:40:41,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:41,998 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:41,998 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:41,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:41,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:41,998 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:41,998 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:41,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-28 10:40:41,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:41,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:41,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:41,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:41,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:42,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:42,047 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 [2018-09-28 10:40:42,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:42,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:42,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:42,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:42,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:42,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:42,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:42,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:42,114 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:42,114 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:42,430 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:42,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:42,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:42,431 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:42,431 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:42,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:40:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:42,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:42,539 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:42,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:42,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:42,539 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:42,539 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:42,539 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-28 10:40:42,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:42,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:42,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:42,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:42,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:42,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:42,589 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 [2018-09-28 10:40:42,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:42,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:40:42,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:42,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:42,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:42,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:42,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:42,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:42,676 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:42,968 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:42,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:42,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:42,968 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:42,969 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:42,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-28 10:40:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:40:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:40:43,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-28 10:40:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:43,047 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:40:43,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:40:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:43,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:43,048 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:40:43,048 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:43,048 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-28 10:40:43,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:43,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:43,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:43,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:43,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:43,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:43,098 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 [2018-09-28 10:40:43,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:43,112 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:43,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:43,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:43,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:43,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:43,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:43,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:43,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:43,164 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-28 10:40:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:43,466 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:43,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:43,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:43,467 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:43,467 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:43,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:40:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:43,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:43,577 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:43,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:43,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:43,578 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:43,578 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:43,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:43,578 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-28 10:40:43,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:43,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:43,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:43,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:43,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:43,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:43,655 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 [2018-09-28 10:40:43,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:43,670 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:40:43,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:43,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:43,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:43,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:43,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:43,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:43,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:43,774 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:44,078 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:44,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:44,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:44,079 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:44,079 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:44,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:40:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:44,185 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:44,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:44,185 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:44,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:44,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:44,185 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:44,186 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:44,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-28 10:40:44,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:44,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:44,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:44,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:44,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:44,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:44,245 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 [2018-09-28 10:40:44,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:44,266 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:40:44,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:44,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:44,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:44,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:44,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:44,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:44,327 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:44,629 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:44,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:44,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:44,630 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:44,630 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:44,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:40:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:44,741 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:44,741 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:44,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:44,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:44,741 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:44,741 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:44,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-28 10:40:44,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:44,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:44,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:44,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:44,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:44,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:44,790 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 [2018-09-28 10:40:44,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:44,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:44,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:44,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:44,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:44,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:44,855 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:45,154 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:45,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:45,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:45,155 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:45,155 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:45,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:40:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:45,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:40:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:45,255 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:45,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:45,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:45,255 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:45,255 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:45,256 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-28 10:40:45,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:45,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:45,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:45,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:45,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:45,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:45,413 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 [2018-09-28 10:40:45,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:45,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:45,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:45,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:45,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:45,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:45,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:45,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:45,474 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:40:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:45,804 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:45,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:45,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:45,805 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:45,805 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:45,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:40:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:45,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:45,916 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:45,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:45,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:45,917 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:45,917 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:45,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-28 10:40:45,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:45,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:45,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:45,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:45,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:46,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:46,315 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 [2018-09-28 10:40:46,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:46,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:40:46,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:46,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:46,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:46,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:46,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:46,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:46,389 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:46,389 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:46,722 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:46,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:46,722 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:46,723 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:46,723 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:46,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:40:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:46,830 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:46,830 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:46,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:46,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:46,830 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:46,831 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:46,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-28 10:40:46,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:46,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:46,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:46,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:46,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:46,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:46,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:46,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:46,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:46,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:46,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:46,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:46,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:46,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:46,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:46,968 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:47,275 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:47,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:47,276 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:47,276 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:47,276 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:47,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:40:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:47,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:47,396 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:47,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:47,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:47,396 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:47,396 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:47,396 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-28 10:40:47,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:47,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:47,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:47,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:47,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:47,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:47,444 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 [2018-09-28 10:40:47,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:47,463 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:40:47,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:47,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:47,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:47,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:47,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:47,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:47,535 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:47,826 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:47,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:47,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:47,827 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:47,827 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:47,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:40:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:47,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:40:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:47,915 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:47,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:47,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:47,916 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:47,916 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:47,916 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-28 10:40:47,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:47,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:47,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:47,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:47,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:47,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:47,967 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 [2018-09-28 10:40:47,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:47,984 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:40:47,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:47,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:48,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:48,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:48,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:48,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:48,042 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:40:48,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:48,339 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:48,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:48,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:48,340 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:48,340 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:48,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:40:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:48,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:48,457 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:48,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:48,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:48,457 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:48,457 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:48,457 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:48,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-28 10:40:48,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:48,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:48,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:48,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:48,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:48,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:48,558 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 [2018-09-28 10:40:48,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:48,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:48,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:48,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:48,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:48,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:48,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:48,653 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:48,970 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:48,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:48,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:48,971 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:48,971 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:48,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:40:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:49,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:49,090 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:49,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:49,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:49,091 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:49,091 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:49,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-28 10:40:49,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:49,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:49,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:49,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:49,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:49,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:49,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:49,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:49,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:49,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:49,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:49,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:49,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:49,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:49,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:49,238 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:49,542 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:40:49,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:49,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:49,543 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:40:49,543 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:40:49,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:40:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:40:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:49,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:49,659 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:49,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:49,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:49,660 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:49,660 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:49,660 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:49,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-28 10:40:49,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:49,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:49,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:49,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:49,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:49,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:49,708 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 [2018-09-28 10:40:49,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:49,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:40:49,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:49,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:49,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:49,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:49,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:49,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:49,807 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:50,105 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:40:50,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:50,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:50,105 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:40:50,105 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:40:50,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:40:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:40:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:50,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:40:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:50,213 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:50,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:50,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:50,213 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:50,214 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:50,214 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-28 10:40:50,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:50,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:50,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:50,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:50,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:50,261 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 [2018-09-28 10:40:50,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:50,275 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:50,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:50,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:50,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:50,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:50,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:50,337 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:50,338 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:40:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:50,624 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:50,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:50,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:50,625 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:50,625 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:50,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-28 10:40:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:50,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:50,745 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:50,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:50,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:50,745 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:50,745 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:50,745 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-28 10:40:50,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:50,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:50,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:50,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:50,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:50,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:50,794 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 [2018-09-28 10:40:50,801 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:50,810 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:40:50,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:50,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:50,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:50,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:50,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:50,865 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:50,865 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:51,143 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:40:51,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:51,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:51,144 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:40:51,145 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:40:51,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:40:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-28 10:40:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:51,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:51,254 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:51,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:51,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:51,255 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:51,255 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:51,255 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-28 10:40:51,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:51,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:51,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:51,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:51,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:51,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:51,309 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 [2018-09-28 10:40:51,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:51,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:40:51,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:51,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:51,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:51,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:51,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:51,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:51,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:51,392 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:51,661 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:40:51,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:51,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:51,662 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:40:51,662 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:40:51,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:40:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-28 10:40:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:51,774 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:51,774 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:51,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:51,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:51,774 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:51,774 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:51,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-28 10:40:51,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:51,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:51,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:51,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:51,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:51,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:51,835 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 [2018-09-28 10:40:51,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:51,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:51,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:51,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:51,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:51,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:51,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:51,906 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:52,148 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-28 10:40:52,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:52,148 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:52,149 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:40:52,149 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:40:52,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:40:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-28 10:40:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:40:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:40:52,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-28 10:40:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:52,224 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:40:52,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:40:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:52,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:52,224 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:40:52,224 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:52,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-28 10:40:52,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:52,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:52,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:52,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:52,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:52,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:52,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:52,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:52,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:52,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:52,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:52,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:52,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:52,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:52,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:52,356 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:52,356 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-28 10:40:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:52,739 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:52,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:52,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:52,740 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:52,740 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:52,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:52,861 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:52,862 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:52,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:52,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:52,862 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:52,862 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:52,862 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:52,862 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-28 10:40:52,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:52,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:52,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:52,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:52,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:52,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:52,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:52,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:52,927 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:40:52,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:52,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:52,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:52,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:52,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:52,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:52,999 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:52,999 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:53,388 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:53,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:53,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:53,389 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:53,389 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:53,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:53,525 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:53,525 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:53,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:53,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:53,526 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:53,526 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:53,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-28 10:40:53,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:53,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:53,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:53,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:53,589 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 [2018-09-28 10:40:53,598 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:53,603 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:53,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:53,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:53,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:53,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:53,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:53,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:53,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:53,672 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:54,077 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:54,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:54,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:54,078 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:54,078 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:54,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:54,206 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:54,206 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:54,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:54,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:54,207 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:54,207 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:54,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-28 10:40:54,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:54,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:54,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:54,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:54,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:54,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:54,256 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 [2018-09-28 10:40:54,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:54,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:40:54,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:54,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:54,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:54,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:54,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:54,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:54,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:54,327 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:54,715 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:54,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:54,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:54,716 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:54,716 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:54,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:40:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:40:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:40:54,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:40:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:54,836 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:40:54,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:40:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:54,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:54,836 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:54,836 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:54,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:54,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-28 10:40:54,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:54,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:54,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:54,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:54,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:54,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:54,884 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 [2018-09-28 10:40:54,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:54,901 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:40:54,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:54,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:54,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:54,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:54,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:54,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:54,970 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:54,970 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:40:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:55,357 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:55,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:55,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:55,358 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:55,358 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:55,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:40:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:55,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:55,478 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:55,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:55,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:55,478 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:55,478 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:55,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:55,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-28 10:40:55,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:55,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:55,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:55,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:55,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:55,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:55,529 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 [2018-09-28 10:40:55,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:55,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:55,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:55,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:55,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:55,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:55,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:55,608 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:55,974 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:40:55,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:55,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:55,974 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:40:55,974 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:40:55,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:40:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:40:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:56,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:56,102 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:56,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:56,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:56,103 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:56,103 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:56,103 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-28 10:40:56,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:56,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:56,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:56,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:56,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:56,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:56,211 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 [2018-09-28 10:40:56,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:56,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:56,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:56,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:56,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:56,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:56,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:56,283 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:56,283 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:56,629 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:40:56,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:56,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:56,630 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:40:56,630 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:40:56,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:40:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:40:56,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:56,756 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:56,756 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:56,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:56,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:56,757 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:56,757 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:56,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-28 10:40:56,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:56,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:56,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:56,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:56,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:56,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:56,805 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 [2018-09-28 10:40:56,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:56,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:40:56,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:56,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:56,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:56,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:56,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:56,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:56,891 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:57,236 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:40:57,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:57,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:57,237 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:40:57,237 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:40:57,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:40:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-28 10:40:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:40:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:40:57,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:40:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:57,335 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:40:57,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:40:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:57,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:57,335 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:40:57,335 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:57,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-28 10:40:57,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:57,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:57,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:57,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:57,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:57,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:57,382 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 [2018-09-28 10:40:57,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:57,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:57,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:57,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:57,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:57,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:57,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:57,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:57,476 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:40:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:57,871 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:57,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:57,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:57,871 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:57,871 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:57,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:58,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:58,006 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:58,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:58,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:58,007 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:58,007 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:58,007 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:58,007 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-28 10:40:58,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:58,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:58,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:58,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:58,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:58,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:58,054 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 [2018-09-28 10:40:58,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:58,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:40:58,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:58,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:58,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:58,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:58,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:58,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:58,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:58,125 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:58,531 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:58,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:58,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:58,532 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:58,532 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:58,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:40:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:40:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:40:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:40:58,665 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:40:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:58,665 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:40:58,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:40:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:58,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:58,666 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:58,666 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:58,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-28 10:40:58,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:58,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:58,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:58,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:58,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:58,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:58,764 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 [2018-09-28 10:40:58,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:58,781 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:40:58,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:58,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:58,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:58,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:58,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:58,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:58,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:58,867 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:40:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:59,281 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:40:59,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:59,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:59,282 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:40:59,282 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:40:59,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:40:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:40:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:40:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:40:59,413 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:40:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:59,413 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:40:59,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:40:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:40:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:40:59,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:59,413 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:40:59,413 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:59,414 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-28 10:40:59,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:59,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:59,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:59,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:59,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:59,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:59,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:40:59,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:59,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:59,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:59,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:40:59,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:40:59,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:40:59,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:59,542 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:40:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:59,935 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:40:59,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:40:59,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:40:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:59,936 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:40:59,936 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:40:59,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:41:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:41:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:41:00,047 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:41:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:00,047 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:41:00,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:41:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:00,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:00,048 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:00,048 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:00,048 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:00,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-28 10:41:00,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:00,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:00,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:00,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:00,098 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 [2018-09-28 10:41:00,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:00,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:00,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:00,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:00,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:00,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:00,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:00,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:00,174 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:41:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:00,550 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:00,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:00,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:00,551 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:00,551 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:00,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:41:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:00,683 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:00,683 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:00,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:00,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:00,684 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:00,684 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:00,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-28 10:41:00,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:00,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:00,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:00,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:00,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:00,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:00,732 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 [2018-09-28 10:41:00,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:00,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:00,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:00,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:00,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:00,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:00,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:00,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:00,817 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:01,189 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:01,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:01,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:01,190 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:01,191 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:01,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:41:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:01,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:01,318 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:01,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:01,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:01,319 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:01,319 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:01,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:01,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-28 10:41:01,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:01,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:01,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:01,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:01,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:01,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:01,385 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 [2018-09-28 10:41:01,393 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:01,398 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:01,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:01,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:01,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:01,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:01,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:01,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:01,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:01,445 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:01,809 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:01,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:01,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:01,810 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:01,810 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:01,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:41:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:01,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:01,946 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:01,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:01,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:01,947 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:01,947 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:01,947 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-28 10:41:01,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:01,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:01,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:01,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:01,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:01,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:01,996 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 [2018-09-28 10:41:02,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:02,040 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:02,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:02,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:02,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:02,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:02,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:02,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:02,098 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:02,974 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:41:02,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:02,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:02,975 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:41:02,975 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:41:02,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:41:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-28 10:41:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:41:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:41:03,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-28 10:41:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:03,131 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:41:03,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:41:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:03,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:03,132 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:03,132 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:03,132 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-28 10:41:03,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:03,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:03,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:03,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:03,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:03,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:03,224 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 [2018-09-28 10:41:03,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:03,247 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:03,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:03,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:03,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:03,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:03,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:03,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:03,296 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-28 10:41:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:03,666 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:03,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:03,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:03,667 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:03,667 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:03,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:41:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:03,814 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:03,815 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:03,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:03,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:03,815 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:03,815 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:03,815 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-28 10:41:03,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:03,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:03,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:03,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:03,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:03,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:03,875 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 [2018-09-28 10:41:03,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:03,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:04,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:04,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:04,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:04,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:04,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:04,019 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:04,527 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:04,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:04,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:04,528 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:04,528 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:04,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:41:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:04,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:04,657 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:04,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:04,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:04,657 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:04,658 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:04,658 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-28 10:41:04,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:04,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:04,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:04,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:04,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:04,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:04,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:04,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:04,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:04,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:04,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:04,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:04,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:04,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:04,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:04,789 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:05,150 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:41:05,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:05,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:05,151 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:41:05,151 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:41:05,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:41:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:41:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:05,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:05,291 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:05,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:05,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:05,292 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:05,292 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:05,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-28 10:41:05,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:05,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:05,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:05,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:05,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:05,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:05,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:05,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:05,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:05,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:05,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:05,414 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:05,759 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:41:05,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:05,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:05,760 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:41:05,760 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:41:05,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:41:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:41:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:41:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:41:05,888 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:41:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:05,888 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:41:05,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:41:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:05,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:05,888 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:05,888 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:05,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-28 10:41:05,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:05,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:05,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:05,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:05,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:05,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:05,946 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:05,952 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:05,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:05,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:06,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:06,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:06,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:06,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:06,007 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:41:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:06,378 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:06,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:06,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:06,379 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:06,379 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:06,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:41:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:06,524 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:06,524 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:06,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:06,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:06,524 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:06,524 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:06,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:06,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-28 10:41:06,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:06,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:06,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:06,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:06,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:06,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:06,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:06,588 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:06,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:06,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:06,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:06,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:06,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:06,653 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:06,653 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:07,020 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:07,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:07,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:07,021 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:07,021 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:07,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:41:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:07,163 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:07,163 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:07,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:07,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:07,164 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:07,164 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:07,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-28 10:41:07,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:07,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:07,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:07,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:07,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:07,223 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:07,231 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:07,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:07,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:07,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:07,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:07,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:07,288 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:07,656 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:41:07,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:07,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:07,657 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:41:07,657 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:41:07,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:41:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:41:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:07,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:07,804 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:07,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:07,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:07,805 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:07,805 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:07,805 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-28 10:41:07,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:07,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:07,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:07,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:07,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:07,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:07,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:07,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:07,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:07,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:07,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:07,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:07,931 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:08,270 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:41:08,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:08,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:08,271 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:41:08,271 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:41:08,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:41:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:41:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:41:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:41:08,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:41:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:08,387 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:41:08,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:41:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:08,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:08,388 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:08,388 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:08,388 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-28 10:41:08,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:08,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:08,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:08,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:08,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:08,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:08,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:08,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:08,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:08,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:08,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:08,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:08,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:08,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:08,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:08,505 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:41:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:08,847 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:41:08,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:08,847 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:08,848 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:41:08,848 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:41:08,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:41:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:41:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:09,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:09,005 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:09,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:09,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:09,005 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:09,005 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:09,005 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-28 10:41:09,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:09,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:09,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:09,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:09,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:09,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:09,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:09,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:09,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:09,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:09,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:09,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:09,318 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:09,654 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:41:09,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:09,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:09,654 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:41:09,655 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:41:09,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:41:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:41:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:09,794 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:09,795 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:09,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:09,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:09,795 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:09,795 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:09,795 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-28 10:41:09,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:09,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:09,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:09,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:09,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:09,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:09,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:09,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:09,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:09,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:09,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:09,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:09,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:09,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:09,932 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:10,282 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:41:10,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:10,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:10,282 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:41:10,283 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:41:10,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:41:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:41:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:10,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:10,426 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:10,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:10,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:10,427 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:10,427 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:10,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:10,427 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-28 10:41:10,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:10,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:10,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:10,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:10,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:10,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:10,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:10,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:10,495 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:10,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:10,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:10,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:10,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:10,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:10,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:10,574 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:10,926 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:41:10,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:10,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:10,927 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:41:10,927 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:41:10,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:41:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:41:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:41:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:41:11,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:41:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:11,050 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:41:11,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:41:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:11,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:11,051 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:11,051 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:11,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-28 10:41:11,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:11,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:11,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:11,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:11,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:11,121 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:11,146 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:11,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:11,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:11,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:11,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:11,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:11,218 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:41:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:11,563 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:41:11,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:11,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:11,564 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:41:11,564 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:41:11,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:41:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-28 10:41:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:11,715 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:11,715 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:11,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:11,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:11,715 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:11,716 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:11,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-28 10:41:11,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:11,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:11,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:11,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:11,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:11,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:11,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:11,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:11,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:11,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:11,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:11,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:11,842 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:12,170 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:41:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:12,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:12,170 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:41:12,170 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:41:12,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:41:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-28 10:41:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:12,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:12,309 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:12,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:12,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:12,309 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:12,309 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:12,310 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-28 10:41:12,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:12,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:12,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:12,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:12,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:12,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:12,389 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:12,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:12,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:12,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:12,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:12,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:12,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:12,439 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:12,747 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:41:12,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:12,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:12,748 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:41:12,748 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:41:12,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:41:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-28 10:41:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:12,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:12,887 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:12,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:12,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:12,888 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:41:12,888 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:12,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:12,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-28 10:41:12,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:12,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:12,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:12,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:12,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:12,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:12,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:12,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:12,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:12,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:13,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:13,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:13,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:13,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:13,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:13,038 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:13,326 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-28 10:41:13,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:13,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:13,327 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:41:13,327 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:41:13,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:41:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-28 10:41:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:41:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:41:13,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-28 10:41:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:13,416 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:41:13,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:41:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:13,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:13,416 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:41:13,416 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:13,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-28 10:41:13,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:13,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:13,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:13,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:13,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:13,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:13,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:13,508 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:13,515 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:13,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:13,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:13,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:13,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:13,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:13,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:13,572 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-28 10:41:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:14,050 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:14,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:14,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:14,051 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:14,051 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:14,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:41:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:14,225 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:14,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:14,225 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:14,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:14,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:14,226 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:14,226 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:14,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-28 10:41:14,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:14,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:14,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:14,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:14,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:14,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:14,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:14,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:14,306 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:14,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:14,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:14,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:14,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:14,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:14,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:14,361 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:14,889 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:14,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:14,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:14,890 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:14,890 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:14,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:41:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:15,058 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:15,058 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:15,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:15,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:15,058 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:15,058 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:15,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-28 10:41:15,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:15,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:15,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:15,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:15,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:15,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:15,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:15,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:15,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:15,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:15,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:15,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:15,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:15,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:15,193 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:15,698 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:41:15,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:15,698 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:15,699 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:41:15,699 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:41:15,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:41:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:41:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:15,902 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:15,902 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:15,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:15,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:15,903 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:15,903 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:15,903 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-28 10:41:15,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:15,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:15,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:15,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:15,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:15,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:15,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:15,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:16,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:16,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:16,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:16,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:16,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:16,024 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:16,513 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:16,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:16,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:16,520 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:16,520 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:16,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-28 10:41:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:16,684 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:16,684 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:16,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:16,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:16,685 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:16,685 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:16,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-28 10:41:16,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:16,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:16,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:16,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:16,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:16,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:16,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:16,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:16,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:16,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:16,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:16,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:16,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:16,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:16,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:16,823 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:17,333 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:17,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:17,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:17,334 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:17,334 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:17,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:41:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:17,502 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:17,503 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:17,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:17,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:17,503 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:17,503 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:17,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-28 10:41:17,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:17,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:17,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:17,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:17,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:17,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:17,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:17,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:17,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:17,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:17,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:17,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:17,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:17,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:17,623 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:18,142 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:18,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:18,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:18,142 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:18,143 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:18,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:41:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:18,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:18,307 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:18,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:18,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:18,307 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:18,307 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:18,307 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-28 10:41:18,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:18,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:18,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:18,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:18,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:18,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:18,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:18,397 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:18,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:18,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:18,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:18,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:18,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:18,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:18,703 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:19,182 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:41:19,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:19,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:19,183 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:41:19,183 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:41:19,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:19,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:41:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:41:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:19,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:19,358 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:19,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:19,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:19,359 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:19,359 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:19,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-28 10:41:19,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:19,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:19,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:19,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:19,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:19,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:19,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:19,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:19,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:19,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:19,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:19,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:19,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:19,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:19,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:19,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:19,572 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:20,052 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:20,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:20,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:20,053 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:20,053 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:20,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-28 10:41:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:41:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:41:20,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:41:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:20,194 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:41:20,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:41:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:20,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:20,194 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:20,194 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:20,194 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-28 10:41:20,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:20,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:20,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:20,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:20,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:20,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:20,258 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:20,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:20,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:20,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:20,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:20,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:20,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:20,309 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:41:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:20,797 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:20,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:20,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:20,798 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:20,798 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:20,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:41:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:20,970 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:20,971 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:20,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:20,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:20,971 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:20,971 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:20,971 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:20,971 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-28 10:41:20,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:20,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:20,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:20,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:20,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:21,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:21,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:21,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:21,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:21,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:21,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:21,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:21,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:21,210 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:21,679 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:21,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:21,679 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:21,680 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:21,680 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:21,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:41:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:21,852 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:21,853 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:21,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:21,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:21,853 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:21,853 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:21,853 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-28 10:41:21,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:21,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:21,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:21,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:21,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:21,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:21,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:21,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:21,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:21,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:21,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:22,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:22,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:22,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:22,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:22,013 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:22,518 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:22,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:22,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:22,519 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:22,519 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:22,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:41:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:22,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:22,693 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:22,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:22,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:22,693 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:22,693 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:22,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-28 10:41:22,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:22,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:22,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:22,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:22,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:22,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:22,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:22,761 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:22,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:22,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:22,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:22,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:22,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:22,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:22,825 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:23,528 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:23,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:23,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:23,529 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:23,529 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:23,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-28 10:41:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:23,687 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:23,687 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:23,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:23,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:23,687 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:23,687 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:23,687 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:23,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-28 10:41:23,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:23,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:23,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:23,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:23,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:23,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:23,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:23,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:23,779 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:23,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:23,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:23,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:23,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:23,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:23,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:23,823 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:24,306 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:24,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:24,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:24,306 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:24,306 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:24,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:41:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:24,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:24,494 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:24,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:24,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:24,494 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:24,494 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:24,494 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-28 10:41:24,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:24,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:24,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:24,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:24,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:24,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:24,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:24,568 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:24,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:24,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:24,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:24,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:24,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:24,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:24,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:24,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:24,646 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:25,126 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:25,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:25,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:25,127 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:25,127 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:25,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:41:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:25,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:25,307 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:25,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:25,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:25,307 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:25,307 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:25,308 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-28 10:41:25,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:25,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:25,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:25,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:25,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:25,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:25,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:25,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:25,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:25,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:25,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:25,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:25,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:25,427 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:25,427 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:25,895 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:41:25,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:25,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:25,895 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:41:25,895 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:41:25,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:41:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:26,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:26,104 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:26,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:26,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:26,105 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:26,105 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:26,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:26,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-28 10:41:26,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:26,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:26,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:26,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:26,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:26,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:26,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:26,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:26,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:26,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:26,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:26,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:26,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:26,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:26,230 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:26,655 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:26,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:26,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:26,656 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:26,656 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:26,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-28 10:41:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:41:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:41:26,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:41:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:26,789 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:41:26,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:41:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:26,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:26,789 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:26,789 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:26,789 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:26,789 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-28 10:41:26,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:26,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:26,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:26,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:26,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:26,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:26,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:26,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:26,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:26,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:26,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:26,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:26,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:26,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:26,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:26,916 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:41:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:27,450 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:27,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:27,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:27,450 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:27,451 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:27,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:41:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:27,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:27,630 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:27,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:27,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:27,630 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:27,631 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:27,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-28 10:41:27,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:27,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:27,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:27,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:27,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:27,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:27,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:27,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:27,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:27,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:27,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:27,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:27,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:27,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:27,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:27,761 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:28,306 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:28,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:28,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:28,306 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:28,307 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:28,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:41:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:28,497 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:28,497 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:28,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:28,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:28,498 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:28,498 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:28,498 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-28 10:41:28,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:28,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:28,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:28,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:28,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:28,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:28,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:28,556 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:28,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:28,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:28,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:28,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:28,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:28,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:28,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:28,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:28,617 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:29,168 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:41:29,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:29,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:29,168 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:41:29,168 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:41:29,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:41:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:41:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:29,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:29,351 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:29,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:29,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:29,351 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:29,351 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:29,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-28 10:41:29,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:29,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:29,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:29,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:29,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:29,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:29,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:29,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:29,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:29,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:29,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:29,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:29,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:29,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:29,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:29,493 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:30,025 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:30,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:30,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:30,026 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:30,026 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:30,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-28 10:41:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:30,204 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:30,204 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:30,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:30,204 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:30,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:30,205 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:30,205 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:30,205 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-28 10:41:30,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:30,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:30,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:30,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:30,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:30,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:30,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:30,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:30,271 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:30,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:30,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:30,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:30,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:30,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:30,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:30,324 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:30,869 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:30,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:30,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:30,870 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:30,870 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:30,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:41:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:31,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:31,063 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:31,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:31,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:31,063 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:31,064 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:31,064 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-28 10:41:31,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:31,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:31,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:31,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:31,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:31,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:31,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:31,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:31,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:31,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:31,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:31,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:31,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:31,198 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:31,782 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:41:31,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:31,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:31,783 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:41:31,783 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:41:31,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:41:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:41:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:31,978 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:31,978 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:31,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:31,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:31,979 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:31,979 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:31,979 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-28 10:41:31,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:31,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:31,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:31,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:31,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:32,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:32,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:32,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:32,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:32,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:32,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:32,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:32,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:32,106 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:32,647 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:41:32,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:32,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:32,647 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:41:32,648 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:41:32,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:41:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:41:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:32,848 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:32,848 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:32,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:32,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:32,848 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:32,848 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:32,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-28 10:41:32,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:32,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:32,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:32,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:32,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:32,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:32,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:32,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:32,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:32,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:32,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:32,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:32,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:32,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:32,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:32,967 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:33,482 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:33,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:33,483 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:33,483 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:33,483 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:33,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-28 10:41:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:41:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:41:33,651 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:41:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:33,651 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:41:33,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:41:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:33,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:33,651 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:33,652 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:33,652 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-28 10:41:33,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:33,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:33,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:33,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:33,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:33,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:33,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:33,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:33,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:33,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:33,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:33,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:33,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:33,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:33,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:33,772 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:41:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:34,295 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:34,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:34,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:34,296 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:34,296 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:34,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:41:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:34,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:34,499 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:34,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:34,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:34,500 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:34,500 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:34,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-28 10:41:34,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:34,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:34,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:34,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:34,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:34,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:34,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:34,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:34,576 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:34,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:34,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:34,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:34,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:34,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:34,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:34,642 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:35,160 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:35,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:35,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:35,161 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:35,161 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:35,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:41:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:35,344 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:35,344 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:35,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:35,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:35,344 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:35,345 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:35,345 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-28 10:41:35,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:35,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:35,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:35,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:35,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:35,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:35,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:35,565 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:35,574 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:35,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:35,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:35,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:35,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:35,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:35,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:35,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:35,622 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:36,159 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:41:36,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:36,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:36,160 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:41:36,161 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:41:36,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:41:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:41:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:36,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:36,347 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:36,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:36,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:36,348 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:36,348 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:36,348 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-28 10:41:36,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:36,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:36,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:36,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:36,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:36,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:36,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:36,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:36,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:36,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:36,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:36,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:36,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:36,483 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:36,985 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:36,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:36,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:36,985 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:36,985 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:36,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-28 10:41:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:37,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:37,161 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:37,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:37,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:37,162 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:37,162 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:37,162 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-28 10:41:37,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:37,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:37,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:37,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:37,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:37,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:37,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:37,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:37,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:37,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:37,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:37,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:37,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:37,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:37,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:37,277 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:37,754 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:37,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:37,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:37,755 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:37,755 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:37,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:41:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:37,956 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:37,956 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:37,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:37,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:37,956 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:37,956 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:37,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-28 10:41:37,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:37,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:37,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:37,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:37,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:38,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:38,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:38,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:38,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:38,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:38,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:38,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:38,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:38,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:38,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:38,102 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:38,590 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:38,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:38,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:38,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:38,591 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:38,591 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:38,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:41:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:38,780 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:38,781 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:38,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:38,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:38,781 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:38,781 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:38,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-28 10:41:38,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:38,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:38,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:38,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:38,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:39,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:39,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:39,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:39,070 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:39,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:39,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:39,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:39,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:39,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:39,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:39,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:39,156 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:39,638 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:41:39,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:39,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:39,638 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:41:39,638 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:41:39,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:41:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:39,828 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:39,828 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:39,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:39,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:39,828 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:41:39,828 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:39,828 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:39,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-28 10:41:39,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:39,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:39,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:39,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:39,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:39,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:39,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:39,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:39,910 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:39,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:39,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:39,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:39,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:39,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:39,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:39,980 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:40,453 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:40,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:40,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:40,454 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:40,454 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:40,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-28 10:41:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:41:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:41:40,580 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-28 10:41:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:40,580 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:41:40,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:41:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:40,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:40,580 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:40,580 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:40,580 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-28 10:41:40,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:40,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:40,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:40,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:40,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:40,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:40,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:40,641 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:40,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:40,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:40,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:40,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:40,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:40,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:40,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:40,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:40,716 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-28 10:41:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:41,242 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:41,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:41,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:41,243 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:41,243 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:41,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:41:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:41,467 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:41,467 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:41,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:41,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:41,468 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:41,468 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:41,468 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-28 10:41:41,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:41,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:41,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:41,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:41,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:41,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:41,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:41,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:41,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:41,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:41,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:41,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:41,605 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:41,605 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:42,134 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:42,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:42,134 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:42,135 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:42,135 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:42,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:41:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:42,337 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:42,337 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:42,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:42,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:42,338 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:42,338 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:42,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-28 10:41:42,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:42,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:42,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:42,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:42,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:42,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:42,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:42,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:42,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:42,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:42,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:42,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:42,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:42,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:42,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:42,465 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:43,006 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:43,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:43,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:43,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:43,007 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:43,008 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:43,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:41:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:43,227 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:43,227 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:43,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:43,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:43,228 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:43,228 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:43,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-28 10:41:43,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:43,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:43,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:43,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:43,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:43,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:43,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:43,292 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:43,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:43,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:43,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:43,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:43,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:43,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:43,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:43,352 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:43,880 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:43,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:43,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:43,882 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:43,882 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:43,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-28 10:41:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:44,077 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:44,078 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:44,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:44,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:44,078 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:44,078 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:44,078 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-28 10:41:44,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:44,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:44,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:44,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:44,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:44,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:44,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:44,142 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:44,147 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:44,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:44,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:44,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:44,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:44,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:44,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:44,370 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:44,874 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:41:44,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:44,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:44,874 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:41:44,874 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:41:44,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:41:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:45,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:45,086 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:45,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:45,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:45,086 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:45,086 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:45,086 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:45,087 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-28 10:41:45,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:45,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:45,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:45,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:45,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:45,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:45,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:45,163 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:45,172 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:45,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:45,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:45,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:45,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:45,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:45,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:45,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:45,223 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:45,735 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:41:45,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:45,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:45,736 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:41:45,736 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:41:45,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-28 10:41:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:45,941 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:45,941 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:45,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:45,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:45,941 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:45,941 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:45,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-28 10:41:45,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:45,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:45,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:45,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:45,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:45,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:45,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:45,999 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:46,007 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:46,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:46,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:46,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:46,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:46,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:46,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:46,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:46,061 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:46,551 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:46,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:46,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:46,551 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:46,551 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:46,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:41:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:46,771 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:46,772 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:46,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:46,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:46,772 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:46,772 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:46,772 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:46,772 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-28 10:41:46,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:46,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:46,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:46,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:46,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:46,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:46,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:46,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:46,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:46,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:46,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:46,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:46,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:46,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:46,889 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:47,371 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:47,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:47,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:47,372 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:47,372 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:47,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-28 10:41:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:41:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:41:47,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:41:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:47,544 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:41:47,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:41:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:47,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:47,545 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:47,545 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:47,545 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-28 10:41:47,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:47,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:47,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:47,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:47,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:47,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:47,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:47,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:47,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:47,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:47,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:47,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:47,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:47,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:47,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:47,660 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:41:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:48,253 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:48,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:48,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:48,253 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:48,253 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:48,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:41:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:48,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:48,491 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:48,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:48,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:48,491 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:48,491 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:48,492 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:48,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-28 10:41:48,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:48,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:48,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:48,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:48,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:48,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:48,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:48,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:48,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:48,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:48,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:48,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:48,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:48,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:48,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:48,787 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:49,383 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:49,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:49,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:49,383 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:49,383 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:49,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:41:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:49,589 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:49,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:49,589 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:49,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:49,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:49,590 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:49,590 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:49,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:49,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-28 10:41:49,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:49,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:49,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:49,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:49,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:49,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:49,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:49,650 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:49,656 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:49,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:49,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:49,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:49,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:49,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:49,722 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:49,722 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:50,271 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:41:50,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:50,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:50,271 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:41:50,271 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:41:50,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:41:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:41:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:50,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:50,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:50,492 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:50,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:50,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:50,492 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:50,492 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:50,493 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-28 10:41:50,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:50,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:50,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:50,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:50,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:50,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:50,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:50,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:50,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:50,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:50,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:50,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:50,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:50,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:50,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:50,634 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:51,191 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:41:51,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:51,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:51,192 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:41:51,192 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:41:51,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:41:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-28 10:41:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:51,385 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:51,385 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:51,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:51,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:51,385 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:51,385 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:51,385 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-28 10:41:51,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:51,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:51,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:51,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:51,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:51,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:51,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:51,511 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:51,519 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:51,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:51,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:51,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:51,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:51,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:51,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:51,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:51,563 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:52,100 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:41:52,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:52,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:52,100 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:41:52,100 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:41:52,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:41:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:52,310 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:52,310 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:52,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:52,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:52,310 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:52,310 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:52,311 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:52,311 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-28 10:41:52,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:52,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:52,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:52,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:52,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:52,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:52,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:52,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:52,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:52,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:52,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:52,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:52,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:52,429 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:52,958 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:41:52,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:52,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:52,959 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:41:52,959 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:41:52,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:41:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-28 10:41:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:53,162 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:53,162 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:53,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:53,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:53,163 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:53,163 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:53,163 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-28 10:41:53,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:53,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:53,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:53,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:53,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:53,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:53,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:53,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:53,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:53,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:53,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:53,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:53,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:53,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:53,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:53,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:53,294 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:53,800 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:53,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:53,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:53,801 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:53,801 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:53,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:41:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:54,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:54,023 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:54,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:54,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:54,024 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:41:54,024 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:54,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-28 10:41:54,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:54,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:54,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:54,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:54,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:54,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:54,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:54,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:54,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:54,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:54,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:54,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:54,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:54,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:54,148 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:54,620 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:54,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:54,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:54,621 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:54,621 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:54,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-28 10:41:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:41:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:41:54,784 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:41:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:54,784 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:41:54,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:41:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:54,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:54,784 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:54,784 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:54,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-28 10:41:54,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:54,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:54,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:54,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:54,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:54,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:54,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:54,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:41:54,847 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:41:54,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:54,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:54,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:54,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:54,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:54,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:54,908 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:41:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:55,383 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:55,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:55,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:55,383 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:55,383 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:55,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:41:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:55,601 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:55,601 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:55,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:55,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:55,601 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:55,601 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:55,601 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-28 10:41:55,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:55,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:55,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:55,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:55,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:55,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:55,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:55,658 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:41:55,665 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:41:55,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:55,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:55,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:55,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:55,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:55,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:55,718 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:56,249 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:56,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:56,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:56,250 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:56,250 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:56,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:56,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:41:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:41:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:41:56,484 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:41:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:56,484 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:41:56,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:41:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:56,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:56,485 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:56,485 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:56,485 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-28 10:41:56,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:56,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:56,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:56,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:56,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:56,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:56,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:56,540 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:41:56,551 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:41:56,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:56,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:56,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:56,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:56,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:56,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:56,608 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:41:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:57,103 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:41:57,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:57,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:57,104 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:41:57,104 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:41:57,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:41:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-28 10:41:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:57,323 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:57,324 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:57,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:57,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:57,324 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:57,324 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:57,324 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-28 10:41:57,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:57,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:57,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:57,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:57,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:57,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:57,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:57,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:57,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:57,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:57,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:57,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:57,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:57,439 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:41:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:57,933 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:41:57,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:57,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:57,934 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:41:57,934 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:41:57,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:41:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:41:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:41:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:41:58,143 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:41:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:58,143 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:41:58,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:41:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:58,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:58,143 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:41:58,143 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:58,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-28 10:41:58,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:58,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:58,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:58,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:41:58,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:58,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:58,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:58,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:41:58,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:41:58,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:58,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:58,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:58,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:58,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:58,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:58,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:58,261 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:41:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:58,769 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:41:58,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:41:58,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:41:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:58,770 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:41:58,770 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:41:58,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:41:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:41:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:41:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:41:58,990 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:41:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:58,990 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:41:58,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:41:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:41:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:41:58,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:58,991 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:41:58,991 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:58,991 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:58,991 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-28 10:41:58,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:58,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:58,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:58,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:58,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:59,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:41:59,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:41:59,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:41:59,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:41:59,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:41:59,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:41:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:59,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:41:59,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:41:59,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:41:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:41:59,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:59,598 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:42:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:00,861 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:42:00,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:00,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:00,862 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:42:00,862 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:42:00,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:42:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:42:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:01,090 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:42:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:01,090 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:01,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:01,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:01,091 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:42:01,091 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:01,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:01,091 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-28 10:42:01,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:01,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:01,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:01,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:01,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:01,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:01,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:01,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:01,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:01,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:01,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:01,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:01,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:01,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:01,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:01,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:01,225 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:42:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:01,722 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:42:01,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:01,723 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:01,723 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:42:01,723 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:42:01,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:42:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-28 10:42:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:01,962 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:42:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:01,962 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:01,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:01,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:01,963 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:42:01,963 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:01,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-28 10:42:01,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:01,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:01,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:01,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:01,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:02,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:02,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:02,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:02,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:42:02,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:02,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:02,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:02,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:02,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:02,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:02,084 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:42:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:02,554 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:42:02,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:02,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:02,555 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:42:02,555 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:42:02,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:42:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-28 10:42:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:42:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:42:02,745 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:42:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:02,746 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:42:02,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:42:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:02,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:02,746 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:42:02,746 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:02,746 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:02,746 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-28 10:42:02,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:02,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:02,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:02,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:02,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:02,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:02,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:02,818 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:02,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:42:02,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:02,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:02,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:02,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:02,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:02,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:02,892 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:42:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:03,345 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:42:03,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:03,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:03,346 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:42:03,346 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:42:03,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:42:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-28 10:42:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:03,592 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:42:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:03,592 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:03,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:03,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:03,592 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:42:03,592 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:03,593 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-28 10:42:03,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:03,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:03,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:03,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:03,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:03,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:03,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:03,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:03,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:03,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:03,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:03,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:03,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:03,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:03,719 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:42:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:04,166 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:42:04,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:04,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:04,166 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:42:04,166 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:42:04,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:42:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:42:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:04,398 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:42:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:04,399 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:04,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:04,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:04,399 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:42:04,399 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:04,399 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:04,399 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-28 10:42:04,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:04,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:04,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:04,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:04,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:04,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:04,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:04,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:04,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:04,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:04,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:04,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:04,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:04,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:04,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:04,518 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:42:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:04,987 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:42:04,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:04,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:04,987 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:42:04,988 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:42:04,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:42:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-28 10:42:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:05,225 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:42:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:05,225 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:05,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:05,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:05,225 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:42:05,225 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:05,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:05,226 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-28 10:42:05,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:05,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:05,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:05,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:05,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:05,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:05,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:05,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:05,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:42:05,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:05,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:05,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:05,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:05,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:05,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:05,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:05,368 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:42:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:05,835 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:42:05,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:05,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:05,836 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:42:05,836 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:42:05,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:42:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-28 10:42:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:42:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:42:06,039 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:42:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:06,039 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:42:06,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:42:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:06,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:06,040 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:42:06,040 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:06,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-28 10:42:06,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:06,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:06,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:06,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:06,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:06,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:06,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:06,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:06,100 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:06,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:06,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:06,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:06,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:06,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:06,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:06,168 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:42:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:06,590 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:42:06,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:06,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:06,591 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:42:06,591 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:42:06,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:42:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-28 10:42:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:06,817 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:42:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:06,817 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:06,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:06,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:06,817 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:42:06,817 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:06,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:06,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-28 10:42:06,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:06,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:06,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:06,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:06,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:06,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:06,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:06,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:06,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:42:06,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:06,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:06,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:06,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:06,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:06,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:06,950 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:42:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:07,378 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:42:07,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:07,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:07,378 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:42:07,379 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:42:07,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:42:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-28 10:42:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:07,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:42:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:07,616 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:07,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:07,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:07,617 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:42:07,617 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:07,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-28 10:42:07,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:07,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:07,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:07,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:07,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:07,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:07,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:07,684 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:07,692 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:42:07,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:07,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:07,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:07,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:07,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:07,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:07,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:07,744 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:42:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:08,155 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:42:08,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:08,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:08,156 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:42:08,156 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:42:08,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:42:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-28 10:42:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:08,396 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:42:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:08,396 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:08,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:08,396 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:42:08,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:08,397 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-28 10:42:08,397 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:08,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-28 10:42:08,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:08,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:08,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:08,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:08,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:08,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:08,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:08,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:08,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:09,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:09,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:42:09,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:09,011 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:09,011 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:42:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:09,399 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-28 10:42:09,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:09,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:42:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:09,400 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:42:09,400 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:42:09,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:42:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-28 10:42:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:42:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:42:09,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-28 10:42:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:09,551 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:42:09,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:42:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:09,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:09,551 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-28 10:42:09,552 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:09,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:09,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-28 10:42:09,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:09,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:09,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:09,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:09,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:09,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:09,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:09,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:09,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:09,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:09,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:09,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:09,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:09,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:09,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:09,703 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-28 10:42:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:10,428 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:10,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:10,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:10,429 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:10,430 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:10,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:42:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:10,710 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:10,711 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:10,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:10,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:10,711 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:42:10,712 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:10,712 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-28 10:42:10,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:10,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:10,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:10,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:10,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:10,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:10,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:10,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:10,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:10,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:10,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:10,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:10,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:10,849 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:11,604 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:11,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:11,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:11,604 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:11,605 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:11,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:42:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:11,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:11,873 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:11,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:11,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:11,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:11,874 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:42:11,874 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:11,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-28 10:42:11,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:11,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:11,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:11,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:11,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:11,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:11,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:11,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:11,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:11,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:11,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:12,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:12,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:12,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:12,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:12,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:12,000 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:12,706 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:42:12,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:12,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:12,707 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:42:12,707 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:42:12,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:42:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:42:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:12,985 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:12,985 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:12,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:12,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:12,985 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:12,985 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:12,985 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-28 10:42:12,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:12,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:12,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:12,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:12,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:13,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:13,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:13,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:13,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:42:13,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:13,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:13,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:13,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:13,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:13,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:13,124 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:13,802 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:13,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:13,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:13,803 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:13,803 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:13,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:42:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:14,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:42:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:14,055 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:14,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:14,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:14,056 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:42:14,056 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:14,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-28 10:42:14,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:14,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:14,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:14,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:14,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:14,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:14,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:14,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:14,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:14,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:14,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:14,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:14,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:14,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:14,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:14,187 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:42:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:14,939 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:14,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:14,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:14,940 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:14,940 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:14,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:42:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:15,227 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:15,227 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:15,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:15,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:15,228 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:15,228 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:15,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-28 10:42:15,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:15,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:15,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:15,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:15,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:15,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:15,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:15,288 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:15,298 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:42:15,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:15,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:15,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:15,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:15,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:15,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:15,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:15,362 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:16,099 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:16,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:16,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:16,100 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:16,100 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:16,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:42:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:16,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:16,377 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:16,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:16,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:16,377 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:16,377 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:16,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-28 10:42:16,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:16,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:16,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:16,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:16,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:16,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:16,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:16,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:16,447 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:42:16,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:16,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:16,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:16,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:16,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:16,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:16,515 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:17,267 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:42:17,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:17,268 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:17,268 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:42:17,268 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:42:17,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:42:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:42:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:17,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:17,555 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:17,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:17,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:17,555 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:17,555 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:17,555 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-28 10:42:17,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:17,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:17,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:17,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:17,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:17,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:17,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:17,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:17,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:17,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:17,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:17,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:17,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:17,695 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:18,396 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:18,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:18,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:18,397 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:18,397 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:18,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:42:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:42:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:42:18,640 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:42:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:18,641 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:42:18,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:42:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:18,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:18,641 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:42:18,641 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:18,641 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-28 10:42:18,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:18,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:18,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:18,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:18,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:18,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:18,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:18,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:18,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:18,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:18,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:18,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:18,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:18,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:18,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:18,772 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:42:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:19,467 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:19,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:19,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:19,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:19,468 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:19,468 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:19,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:42:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:19,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:19,755 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:19,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:19,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:19,755 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:19,756 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:19,756 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:19,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-28 10:42:19,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:19,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:19,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:19,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:19,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:19,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:19,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:19,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:19,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:42:19,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:19,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:19,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:19,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:19,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:19,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:19,938 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:20,628 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:42:20,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:20,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:20,628 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:42:20,628 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:42:20,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:42:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:42:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:20,909 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:20,909 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:20,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:20,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:20,909 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:20,910 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:20,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-28 10:42:20,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:20,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:20,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:20,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:20,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:20,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:20,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:20,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:20,986 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:20,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:20,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:21,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:21,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:21,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:21,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:21,051 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:21,766 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:21,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:21,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:21,767 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:21,767 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:21,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:42:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:22,075 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:22,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:22,075 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:22,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:22,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:22,076 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:22,076 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:22,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:22,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-28 10:42:22,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:22,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:22,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:22,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:22,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:22,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:22,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:22,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:22,149 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:42:22,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:22,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:22,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:22,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:22,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:22,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:22,206 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:22,921 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:42:22,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:22,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:22,921 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:42:22,922 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:42:22,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:42:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-28 10:42:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:23,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:42:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:23,182 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:23,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:23,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:23,183 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:23,183 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:23,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-28 10:42:23,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:23,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:23,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:23,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:23,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:23,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:23,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:23,242 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:23,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:42:23,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:23,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:23,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:23,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:23,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:23,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:23,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:23,308 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:42:23,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:23,980 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:42:23,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:23,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:23,980 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:42:23,981 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:42:23,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:42:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-28 10:42:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:24,272 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:24,272 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:24,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:24,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:24,273 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:24,273 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:24,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-28 10:42:24,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:24,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:24,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:24,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:24,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:24,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:24,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:24,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:24,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:24,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:24,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:24,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:24,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:24,396 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:25,073 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:42:25,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:25,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:25,074 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:42:25,074 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:42:25,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:42:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:42:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:25,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:25,366 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:25,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:25,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:25,366 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:25,366 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:25,366 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-28 10:42:25,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:25,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:25,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:25,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:25,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:25,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:25,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:25,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:25,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:25,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:25,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:25,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:25,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:25,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:25,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:25,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:25,513 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:26,194 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:42:26,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:26,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:26,195 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:42:26,195 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:42:26,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:42:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:42:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:26,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:26,489 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:26,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:26,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:26,489 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:42:26,489 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:26,489 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-28 10:42:26,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:26,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:26,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:26,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:26,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:27,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:27,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:27,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:27,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:42:27,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:27,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:27,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:27,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:27,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:27,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:27,592 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:28,218 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:42:28,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:28,218 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:28,219 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:42:28,219 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:42:28,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:42:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:42:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:42:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:42:28,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-28 10:42:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:28,506 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:42:28,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:42:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:28,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:28,506 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:42:28,506 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:28,506 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-28 10:42:28,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:28,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:28,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:28,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:28,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:28,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:28,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:28,599 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:28,606 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:28,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:28,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:28,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:28,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:28,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:28,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:28,655 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:28,655 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-28 10:42:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:29,445 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:29,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:29,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:29,446 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:29,446 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:29,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:42:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:29,757 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:29,757 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:29,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:29,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:29,757 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:29,757 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:29,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:29,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-28 10:42:29,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:29,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:29,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:29,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:29,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:29,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:29,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:29,819 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:29,832 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:42:29,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:29,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:29,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:29,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:29,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:29,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:29,903 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:30,706 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:30,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:30,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:30,707 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:30,707 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:30,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:42:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:31,007 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:31,007 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:31,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:31,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:31,007 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:31,007 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:31,008 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-28 10:42:31,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:31,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:31,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:31,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:31,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:31,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:31,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:31,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:31,101 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:42:31,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:31,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:31,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:31,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:31,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:31,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:31,182 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:31,967 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:42:31,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:31,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:31,968 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:42:31,968 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:42:31,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:42:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:42:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:32,289 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:32,289 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:32,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:32,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:32,289 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:32,289 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:32,289 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-28 10:42:32,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:32,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:32,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:32,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:32,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:32,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:32,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:32,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:32,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:32,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:32,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:32,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:32,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:32,422 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:33,183 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:33,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:33,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:33,184 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:33,184 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:33,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:42:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:33,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:42:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:33,457 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:33,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:33,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:33,457 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:33,458 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:33,458 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-28 10:42:33,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:33,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:33,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:33,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:33,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:33,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:33,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:33,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:33,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:33,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:33,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:33,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:33,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:33,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:33,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:33,586 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:42:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:34,416 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:34,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:34,416 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:34,417 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:34,417 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:34,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:42:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:34,731 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:34,731 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:34,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:34,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:34,731 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:34,731 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:34,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-28 10:42:34,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:34,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:34,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:34,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:34,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:34,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:34,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:34,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:34,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:42:34,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:34,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:34,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:34,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:34,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:34,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:34,868 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:35,675 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:42:35,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:35,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:35,676 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:42:35,676 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:42:35,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:42:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:42:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:35,970 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:35,970 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:35,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:35,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:35,970 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:35,970 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:35,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-28 10:42:35,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:35,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:35,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:35,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:35,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:36,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:36,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:36,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:36,079 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:36,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:36,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:36,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:36,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:36,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:36,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:36,170 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:36,170 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:36,979 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:42:36,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:36,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:36,980 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:42:36,980 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:42:36,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:42:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:42:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:37,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:37,276 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:37,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:37,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:37,277 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:42:37,277 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:37,277 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-28 10:42:37,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:37,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:37,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:37,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:37,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:37,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:37,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:37,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:37,346 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:42:37,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:37,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:37,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:37,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:37,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:37,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:37,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:37,403 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:38,154 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:38,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:38,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:38,155 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:38,155 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:38,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:42:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:42:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:42:38,404 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:42:38,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:38,404 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:42:38,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:42:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:38,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:38,404 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:38,405 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:38,405 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-28 10:42:38,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:38,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:38,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:38,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:38,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:38,465 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:38,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:42:38,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:38,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:38,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:38,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:38,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:38,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:38,544 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:42:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:39,289 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:39,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:39,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:39,290 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:39,290 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:39,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:42:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:39,590 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:39,590 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:39,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:39,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:39,591 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:39,591 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:39,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:39,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-28 10:42:39,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:39,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:39,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:39,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:39,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:39,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:39,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:39,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:39,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:39,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:39,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:39,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:39,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:39,938 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:40,698 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:42:40,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:40,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:40,699 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:42:40,699 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:42:40,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:42:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:42:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:41,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:41,023 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:41,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:41,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:41,023 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:41,023 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:41,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:41,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-28 10:42:41,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:41,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:41,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:41,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:41,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:41,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:41,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:41,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:41,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:41,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:41,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:41,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:41,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:41,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:41,185 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:41,994 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:42:41,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:41,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:41,995 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:42:41,995 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:42:41,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:42:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:42:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:42,331 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:42,331 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:42,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:42,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:42,332 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:42:42,332 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:42,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:42,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-28 10:42:42,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:42,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:42,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:42,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:42,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:42,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:42,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:42,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:42:42,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:42,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:42,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:42,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:42,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:42,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:42,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:42,645 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:43,390 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:42:43,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:43,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:43,390 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:42:43,391 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:42:43,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:42:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-28 10:42:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:43,673 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:42:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:43,673 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:43,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:43,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:43,673 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:43,673 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:43,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-28 10:42:43,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:43,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:43,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:43,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:43,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:43,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:43,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:43,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:43,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:43,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:43,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:43,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:43,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:43,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:43,800 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:42:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:44,527 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:42:44,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:44,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:44,528 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:42:44,528 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:42:44,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:42:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-28 10:42:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:44,838 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:44,838 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:44,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:44,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:44,838 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:42:44,838 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:44,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:44,838 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-28 10:42:44,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:44,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:44,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:44,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:44,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:44,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:44,903 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:44,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:42:44,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:44,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:44,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:44,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:44,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:44,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:44,972 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:45,680 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:42:45,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:45,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:45,681 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:42:45,681 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:42:45,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:42:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:42:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:45,983 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:45,983 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:45,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:45,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:45,983 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:42:45,984 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:45,984 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-28 10:42:45,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:45,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:45,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:45,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:45,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:46,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:46,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:46,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:46,055 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:42:46,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:46,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:46,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:46,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:46,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:46,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:46,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:46,129 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:46,835 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:42:46,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:46,835 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:46,836 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:42:46,836 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:42:46,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:42:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:42:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:47,145 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:47,146 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:47,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:47,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:47,146 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:47,146 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:47,146 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:47,146 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-28 10:42:47,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:47,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:47,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:47,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:47,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:47,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:47,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:47,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:47,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:47,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:47,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:47,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:47,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:47,287 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:47,940 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:42:47,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:47,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:47,941 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:42:47,941 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:42:47,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:42:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-28 10:42:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:42:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:42:48,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-28 10:42:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:48,149 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:42:48,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:42:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:48,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:48,150 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:42:48,150 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:48,150 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-28 10:42:48,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:48,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:48,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:48,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:48,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:48,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:48,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:48,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:48,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:48,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:48,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:48,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:48,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:48,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:48,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:48,281 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-28 10:42:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:49,029 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:42:49,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:49,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:49,030 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:42:49,030 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:42:49,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:42:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:42:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:49,359 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:49,359 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:49,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:49,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:49,359 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:49,359 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:49,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-28 10:42:49,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:49,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:49,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:49,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:49,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:49,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:49,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:49,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:42:49,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:49,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:49,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:49,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:49,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:49,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:49,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:49,502 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:50,254 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:42:50,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:50,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:50,255 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:42:50,255 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:42:50,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:42:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:42:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:50,571 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:50,571 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:50,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:50,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:50,572 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:50,572 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:50,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:50,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-28 10:42:50,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:50,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:50,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:50,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:50,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:50,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:50,635 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:50,643 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:50,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:50,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:50,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:50,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:50,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:50,799 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:50,799 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:51,557 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:42:51,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:51,557 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:51,557 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:42:51,557 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:42:51,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:42:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:42:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:51,899 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:51,899 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:51,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:51,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:51,900 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:51,900 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:51,900 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-28 10:42:51,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:51,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:51,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:51,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:51,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:51,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:51,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:51,974 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:42:51,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:51,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:52,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:52,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:52,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:52,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:52,046 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:52,804 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:42:52,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:52,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:52,805 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:42:52,805 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:42:52,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:42:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:42:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:42:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:42:53,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:42:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:53,105 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:42:53,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:42:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:53,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:53,105 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:53,105 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:53,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-28 10:42:53,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:53,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:53,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:53,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:53,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:53,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:53,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:42:53,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:53,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:53,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:53,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:53,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:53,240 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:42:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:53,958 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:42:53,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:53,959 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:53,959 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:42:53,959 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:42:53,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:42:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:42:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:54,289 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:54,289 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:54,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:54,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:54,290 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:54,290 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:54,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:54,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-28 10:42:54,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:54,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:54,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:54,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:54,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:54,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:54,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:54,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:54,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:54,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:54,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:54,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:54,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:54,428 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:55,135 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:42:55,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:55,135 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:55,136 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:42:55,136 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:42:55,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:42:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:42:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:42:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:42:55,522 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:42:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:55,522 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:42:55,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:42:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:55,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:55,522 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:55,522 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:55,522 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-28 10:42:55,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:55,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:55,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:55,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:55,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:55,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:55,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:55,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:55,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:55,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:55,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:55,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:55,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:55,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:55,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:55,659 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:42:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:56,350 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:42:56,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:56,351 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:56,351 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:42:56,351 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:42:56,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:42:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:42:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:56,692 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:56,693 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:56,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:56,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:56,693 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:42:56,693 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:56,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-28 10:42:56,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:56,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:56,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:56,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:56,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:56,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:56,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:56,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:42:56,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:56,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:56,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:56,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:56,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:56,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:56,829 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:56,830 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:57,493 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:42:57,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:57,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:57,493 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:42:57,494 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:42:57,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:42:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:42:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:42:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:42:57,773 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:42:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:57,773 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:42:57,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:42:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:57,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:57,773 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:42:57,774 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:57,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-28 10:42:57,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:57,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:57,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:57,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:57,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:57,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:57,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:57,833 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:57,839 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:57,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:57,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:57,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:57,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:57,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:57,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:57,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:57,908 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:42:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:58,678 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:42:58,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:58,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:58,679 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:42:58,680 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:42:58,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:42:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:42:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:42:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:42:59,007 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:42:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:59,007 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:42:59,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:42:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:42:59,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:59,007 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:42:59,007 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:42:59,007 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-28 10:42:59,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:59,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:59,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:59,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:59,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:42:59,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:42:59,073 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:59,083 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:42:59,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:59,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:59,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:42:59,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:42:59,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:59,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:59,136 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:42:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:59,877 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:42:59,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:59,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:42:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:59,878 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:42:59,878 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:42:59,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:43:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:43:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:00,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:00,199 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:00,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:00,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:00,199 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:00,199 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:00,199 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-28 10:43:00,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:00,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:00,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:00,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:00,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:00,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:00,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:00,260 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:00,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:00,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:00,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:00,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:00,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:00,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:00,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:00,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:00,556 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:01,996 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:43:01,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:01,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:01,997 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:43:01,997 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:43:01,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:43:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:43:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:02,320 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:02,320 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:02,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:02,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:02,321 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:02,321 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:02,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-28 10:43:02,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:02,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:02,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:02,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:02,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:02,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:02,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:02,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:02,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:02,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:02,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:02,445 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:03,195 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:43:03,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:03,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:03,196 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:43:03,196 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:43:03,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:43:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:43:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:43:03,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:43:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:03,571 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:43:03,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:43:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:03,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:03,572 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:03,572 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:03,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-28 10:43:03,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:03,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:03,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:03,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:03,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:03,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:03,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:03,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:03,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:03,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:03,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:03,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:03,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:03,706 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:43:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:04,428 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:43:04,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:04,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:04,428 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:43:04,428 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:43:04,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:43:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:43:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:04,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:04,776 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:04,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:04,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:04,776 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:04,776 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:04,776 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-28 10:43:04,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:04,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:04,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:04,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:04,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:04,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:04,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:04,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:04,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:04,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:04,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:04,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:04,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:04,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:04,904 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:05,609 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:43:05,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:05,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:05,610 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:43:05,610 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:43:05,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:43:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:43:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:05,931 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:05,931 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:05,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:05,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:05,931 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:05,931 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:05,932 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-28 10:43:05,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:05,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:05,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:05,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:05,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:05,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:05,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:05,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:05,999 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:05,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:06,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:06,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:06,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:06,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:06,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:06,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:06,054 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:06,754 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:43:06,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:06,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:06,755 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:43:06,755 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:06,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:43:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:07,080 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:07,080 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:07,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:07,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:07,081 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:07,081 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:07,081 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-28 10:43:07,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:07,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:07,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:07,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:07,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:07,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:07,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:07,145 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:07,156 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:07,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:07,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:07,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:07,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:07,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:07,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:07,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:07,210 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:07,854 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:43:07,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:07,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:07,855 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:43:07,855 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:43:07,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:43:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-28 10:43:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:43:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:43:08,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-28 10:43:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:08,098 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:43:08,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:43:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:08,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:08,099 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:43:08,099 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:08,099 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:08,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-28 10:43:08,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:08,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:08,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:08,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:08,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:08,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:08,158 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:08,169 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:08,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:08,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:08,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:08,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:08,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:08,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:08,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:08,234 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-28 10:43:08,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:08,903 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:43:08,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:08,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:08,904 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:43:08,904 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:08,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:43:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:09,233 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:09,233 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:09,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:09,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:09,233 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:09,233 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:09,233 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-28 10:43:09,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:09,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:09,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:09,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:09,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:09,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:09,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:09,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:09,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:09,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:09,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:09,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:09,357 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:10,038 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:43:10,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:10,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:10,039 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:43:10,039 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:10,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:43:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:10,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:10,364 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:10,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:10,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:10,364 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:10,365 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:10,365 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-28 10:43:10,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:10,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:10,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:10,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:10,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:10,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:10,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:10,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:10,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:10,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:10,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:10,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:10,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:10,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:10,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:10,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:10,494 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:11,143 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:43:11,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:11,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:11,144 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:43:11,144 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:43:11,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:43:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-28 10:43:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:11,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:11,508 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:11,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:11,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:11,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:11,509 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:11,509 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:11,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-28 10:43:11,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:11,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:11,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:11,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:11,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:11,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:11,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:11,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:11,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:11,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:11,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:11,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:11,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:11,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:11,634 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:12,263 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:43:12,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:12,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:12,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:12,264 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:43:12,264 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:43:12,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:43:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:43:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:43:12,569 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:43:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:12,569 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:43:12,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:43:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:12,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:12,570 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:12,570 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:12,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:12,570 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-28 10:43:12,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:12,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:12,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:12,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:12,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:12,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:12,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:12,638 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:12,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:12,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:12,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:12,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:12,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:12,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:12,693 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:43:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:13,380 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:43:13,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:13,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:13,381 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:43:13,381 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:13,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:43:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:13,732 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:13,732 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:13,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:13,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:13,732 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:13,732 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:13,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-28 10:43:13,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:13,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:13,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:13,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:13,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:13,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:13,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:13,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:13,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:13,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:13,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:13,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:13,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:13,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:13,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:13,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:13,899 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:14,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:14,579 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:43:14,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:14,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:14,580 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:43:14,580 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:14,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:43:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:14,940 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:14,940 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:14,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:14,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:14,941 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:14,941 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:14,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-28 10:43:14,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:14,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:14,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:14,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:14,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:14,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:14,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:15,002 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:15,017 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:15,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:15,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:15,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:15,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:15,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:15,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:15,072 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:15,716 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:43:15,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:15,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:15,717 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:43:15,717 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:43:15,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:43:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-28 10:43:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:16,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:16,082 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:16,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:16,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:16,082 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:16,082 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:16,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-28 10:43:16,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:16,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:16,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:16,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:16,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:16,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:16,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:16,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:16,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:16,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:16,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:16,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:16,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:16,216 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:16,829 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:43:16,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:16,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:16,830 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:43:16,830 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:43:16,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:43:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:43:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:43:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:43:17,131 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:43:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:17,132 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:43:17,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:43:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:17,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:17,132 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:17,132 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:17,132 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-28 10:43:17,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:17,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:17,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:17,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:17,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:17,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:17,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:17,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:17,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:17,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:17,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:17,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:17,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:17,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:17,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:17,461 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:43:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:18,073 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:43:18,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:18,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:18,074 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:43:18,074 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:43:18,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:43:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-28 10:43:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:18,444 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:18,444 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:18,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:18,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:18,444 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:18,445 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:18,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-28 10:43:18,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:18,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:18,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:18,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:18,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:18,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:18,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:18,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:18,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:18,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:18,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:18,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:18,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:18,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:18,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:18,671 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:19,259 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:43:19,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:19,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:19,260 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:43:19,260 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:43:19,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:43:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-28 10:43:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:19,587 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:19,587 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:19,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:19,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:19,587 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:19,587 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:19,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:19,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-28 10:43:19,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:19,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:19,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:19,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:19,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:19,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:19,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:19,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:19,654 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:19,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:19,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:19,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:19,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:19,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:19,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:19,719 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:20,402 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:43:20,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:20,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:20,403 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:43:20,403 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:43:20,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:43:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-28 10:43:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:20,747 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:20,747 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:20,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:20,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:20,747 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:20,747 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:20,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:20,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-28 10:43:20,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:20,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:20,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:20,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:20,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:20,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:20,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:20,807 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:20,817 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:20,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:20,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:20,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:20,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:20,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:20,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:20,873 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:21,480 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:43:21,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:21,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:21,481 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:43:21,481 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:43:21,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:43:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:43:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:43:21,796 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:43:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:21,796 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:43:21,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:43:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:21,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:21,796 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:21,796 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:21,796 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-28 10:43:21,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:21,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:21,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:21,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:21,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:21,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:21,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:21,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:21,868 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:21,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:21,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:21,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:21,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:21,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:21,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:21,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:21,936 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:43:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:22,479 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:43:22,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:22,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:22,480 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:43:22,480 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:43:22,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:43:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-28 10:43:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:22,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:22,829 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:22,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:22,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:22,830 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:22,830 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:22,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:22,830 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-28 10:43:22,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:22,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:22,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:22,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:22,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:22,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:22,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:22,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:22,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:22,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:22,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:22,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:22,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:22,951 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:23,539 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:43:23,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:23,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:23,540 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:43:23,540 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:43:23,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:43:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-28 10:43:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:23,905 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:23,905 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:23,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:23,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:23,905 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:23,905 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:23,905 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:23,905 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-28 10:43:23,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:23,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:23,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:23,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:23,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:23,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:23,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:23,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:23,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:23,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:23,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:24,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:24,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:24,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:24,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:24,023 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:24,023 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:24,597 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:43:24,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:24,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:24,598 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:43:24,598 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:43:24,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:43:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-28 10:43:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:24,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:24,964 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:24,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:24,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:24,964 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:43:24,964 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:24,964 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-28 10:43:24,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:24,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:24,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:24,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:24,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:25,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:25,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:25,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:25,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:25,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:25,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:25,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:25,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:25,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:25,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:25,098 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:25,618 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-28 10:43:25,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:25,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:25,619 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:43:25,619 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:43:25,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:43:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-28 10:43:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:43:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:43:25,849 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-28 10:43:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:25,849 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:43:25,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:43:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:25,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:25,849 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:43:25,849 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:25,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-28 10:43:25,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:25,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:25,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:25,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:25,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:25,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:25,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:25,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:25,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:25,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:25,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:26,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:26,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:26,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:26,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:26,107 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-28 10:43:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:27,010 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:27,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:27,011 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:27,011 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:27,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:43:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:27,396 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:27,396 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:27,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:27,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:27,396 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:43:27,397 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:27,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-28 10:43:27,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:27,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:27,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:27,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:27,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:27,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:27,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:27,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:27,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:27,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:27,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:27,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:27,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:27,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:27,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:27,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:27,533 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:28,437 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:28,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:28,438 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:28,438 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:28,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:43:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:28,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:28,843 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:28,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:28,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:28,843 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:43:28,843 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:28,843 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-28 10:43:28,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:28,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:28,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:28,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:28,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:28,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:28,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:28,905 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:28,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:28,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:28,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:28,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:28,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:28,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:28,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:28,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:28,976 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:29,879 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:43:29,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:29,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:29,880 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:43:29,880 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:43:29,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:43:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:43:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:30,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:30,258 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:30,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:30,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:30,259 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:30,259 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:30,259 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:30,259 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-28 10:43:30,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:30,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:30,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:30,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:30,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:30,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:30,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:30,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:30,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:30,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:30,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:30,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:30,377 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:31,237 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:43:31,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:31,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:31,237 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:43:31,237 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:43:31,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:43:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:43:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:43:31,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:43:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:31,586 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:43:31,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:43:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:31,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:31,587 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:43:31,587 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:31,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:31,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-28 10:43:31,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:31,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:31,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:31,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:31,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:31,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:31,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:31,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:31,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:31,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:31,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:31,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:31,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:31,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:31,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:31,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:31,720 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:43:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:32,633 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:32,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:32,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:32,634 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:32,634 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:32,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:43:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:33,097 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:33,097 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:33,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:33,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:33,097 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:33,098 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:33,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-28 10:43:33,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:33,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:33,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:33,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:33,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:33,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:33,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:33,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:33,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:33,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:33,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:33,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:33,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:33,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:33,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:33,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:33,220 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:34,143 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:34,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:34,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:34,144 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:34,144 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:34,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:43:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:34,510 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:34,511 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:34,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:34,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:34,511 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:34,511 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:34,511 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-28 10:43:34,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:34,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:34,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:34,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:34,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:34,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:34,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:34,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:34,592 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:34,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:34,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:34,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:34,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:34,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:34,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:34,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:34,644 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:35,532 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:43:35,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:35,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:35,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:35,533 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:43:35,533 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:43:35,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:43:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:43:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:35,912 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:35,912 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:35,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:35,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:35,913 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:35,913 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:35,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:35,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-28 10:43:35,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:35,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:35,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:35,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:35,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:35,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:35,979 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:35,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:35,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:36,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:36,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:36,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:36,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:36,268 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:37,127 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:43:37,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:37,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:37,128 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:43:37,128 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:43:37,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:43:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:43:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:43:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:43:37,465 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:43:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:37,465 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:43:37,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:43:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:37,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:37,466 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:43:37,466 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:37,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-28 10:43:37,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:37,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:37,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:37,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:37,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:37,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:37,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:37,546 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:37,556 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:37,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:37,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:37,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:37,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:37,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:37,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:37,610 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:43:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:38,481 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:43:38,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:38,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:38,482 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:43:38,482 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:43:38,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:43:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:43:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:38,868 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:38,868 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:38,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:38,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:38,868 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:38,869 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:38,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-28 10:43:38,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:38,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:38,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:38,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:38,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:38,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:38,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:38,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:38,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:38,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:38,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:38,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:38,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:38,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:38,993 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:39,856 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:43:39,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:39,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:39,857 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:43:39,857 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:43:39,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:43:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:43:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:40,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:40,233 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:40,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:40,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:40,233 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:40,233 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:40,234 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:40,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-28 10:43:40,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:40,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:40,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:40,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:40,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:40,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:40,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:40,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:40,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:40,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:40,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:40,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:40,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:40,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:40,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:40,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:40,368 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:41,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:41,248 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:43:41,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:41,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:41,249 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:43:41,249 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:43:41,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:43:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:43:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:41,636 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:41,636 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:41,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:41,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:41,637 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:41,637 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:41,637 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-28 10:43:41,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:41,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:41,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:41,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:41,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:41,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:41,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:41,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:41,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:41,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:41,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:41,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:41,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:41,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:41,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:41,770 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:42,604 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:43:42,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:42,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:42,605 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:43:42,605 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:43:42,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:43:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-28 10:43:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:43:42,956 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:43:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:42,957 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:43:42,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:43:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:42,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:42,957 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:42,957 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:42,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-28 10:43:42,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:42,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:42,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:42,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:42,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:43,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:43,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:43,019 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:43,025 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:43,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:43,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:43,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:43,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:43,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:43,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:43,100 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:43:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:43,897 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:43:43,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:43,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:43,898 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:43:43,898 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:43:43,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:43:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-28 10:43:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:44,296 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:44,296 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:44,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:44,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:44,297 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:44,297 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:44,297 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-28 10:43:44,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:44,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:44,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:44,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:44,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:44,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:44,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:44,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:44,367 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:44,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:44,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:44,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:44,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:44,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:44,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:44,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:44,434 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:45,234 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:43:45,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:45,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:45,235 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:43:45,235 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:43:45,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:43:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:43:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:45,616 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:45,617 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:45,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:45,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:45,617 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:45,617 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:45,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-28 10:43:45,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:45,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:45,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:45,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:45,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:45,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:45,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:45,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:45,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:45,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:45,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:45,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:45,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:45,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:45,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:45,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:45,754 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:46,547 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:43:46,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:46,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:46,548 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:43:46,548 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:43:46,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:43:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:43:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:46,941 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:46,941 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:46,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:46,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:46,942 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:46,942 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:46,942 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-28 10:43:46,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:46,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:46,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:46,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:46,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:46,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:46,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:46,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:47,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:47,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:47,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:47,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:47,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:47,084 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:47,837 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:43:47,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:47,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:47,838 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:43:47,838 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:43:47,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:43:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:43:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:43:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:43:48,127 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-28 10:43:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:48,127 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:43:48,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:43:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:48,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:48,128 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:43:48,128 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:48,128 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-28 10:43:48,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:48,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:48,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:48,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:48,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:48,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:48,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:48,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:48,216 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:48,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:48,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:48,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:48,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:48,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:48,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:48,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:48,277 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-28 10:43:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:49,223 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:49,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:49,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:49,224 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:49,224 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:49,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:43:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:49,623 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:49,623 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:49,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:49,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:49,624 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:49,624 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:49,624 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:49,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-28 10:43:49,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:49,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:49,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:49,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:49,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:49,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:49,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:49,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:49,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:49,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:49,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:49,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:49,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:49,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:49,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:49,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:49,763 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:50,716 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:50,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:50,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:50,717 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:50,717 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:50,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:43:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:51,099 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:51,099 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:51,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:51,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:51,099 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:51,099 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:51,099 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-28 10:43:51,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:51,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:51,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:51,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:51,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:51,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:51,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:51,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:51,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:51,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:51,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:51,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:51,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:51,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:51,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:51,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:51,231 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:52,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:52,136 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:43:52,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:52,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:52,137 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:43:52,137 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:43:52,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:43:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:43:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:52,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:52,533 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:52,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:52,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:52,533 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:52,534 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:52,534 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-28 10:43:52,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:52,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:52,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:52,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:52,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:52,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:52,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:52,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:52,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:43:52,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:52,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:52,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:52,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:52,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:52,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:52,669 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:53,540 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:43:53,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:53,541 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:53,541 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:43:53,541 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:43:53,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:43:53,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:43:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:43:53,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:43:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:53,916 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:43:53,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:53,916 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:43:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:53,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:53,916 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:53,917 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:53,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-28 10:43:53,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:53,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:53,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:53,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:53,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:53,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:53,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:53,979 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:53,988 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:43:53,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:53,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:54,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:54,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:54,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:54,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:54,055 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:43:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:54,991 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:54,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:54,991 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:54,992 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:54,992 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:54,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:43:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:55,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:55,394 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:55,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:55,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:55,394 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:55,394 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:55,394 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-28 10:43:55,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:55,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:55,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:55,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:55,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:55,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:55,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:55,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:55,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:55,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:55,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:55,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:55,525 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:56,476 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:43:56,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:56,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:56,477 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:43:56,477 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:43:56,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:43:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:43:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:43:56,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:43:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:56,865 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:43:56,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:43:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:56,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:56,866 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:43:56,866 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:56,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-28 10:43:56,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:56,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:56,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:56,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:56,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:56,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:56,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:56,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:56,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:56,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:56,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:56,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:56,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:56,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:56,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:56,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:56,985 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:43:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:57,914 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:43:57,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:57,914 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:57,914 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:43:57,914 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:43:57,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:43:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:43:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:43:58,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:43:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:58,314 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:43:58,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:43:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:58,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:58,314 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:58,314 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:58,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-28 10:43:58,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:58,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:58,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:58,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:58,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:58,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:58,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:58,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:58,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:58,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:58,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:58,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:58,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:58,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:58,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:58,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:58,448 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:43:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:59,338 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:43:59,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:43:59,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:43:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:59,339 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:43:59,339 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:43:59,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:43:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:43:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:43:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:43:59,686 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:43:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:59,686 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:43:59,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:43:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:43:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:59,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:59,686 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:43:59,686 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:43:59,686 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-28 10:43:59,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:59,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:59,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:59,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:59,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:59,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:43:59,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:43:59,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:59,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:59,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:59,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:59,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:43:59,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:43:59,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:43:59,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:43:59,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:59,821 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:44:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:00,728 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:44:00,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:44:00,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:44:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:00,729 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:44:00,729 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:44:00,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:44:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:44:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:44:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:44:01,151 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:44:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:01,151 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:44:01,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:44:01,151 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:44:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:44:01,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:01,151 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:44:01,151 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:44:01,152 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-09-28 10:44:01,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:01,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:01,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:01,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:01,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:01,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:44:01,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:44:01,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:01,221 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:44:01,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:01,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:01,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:44:01,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:44:01,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:44:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:44:01,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:01,287 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. Received shutdown request... [2018-09-28 10:44:02,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:44:02,071 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:44:02,144 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:44:02,144 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:44:02 BoogieIcfgContainer [2018-09-28 10:44:02,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:44:02,145 INFO L168 Benchmark]: Toolchain (without parser) took 258769.30 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 335.0 MB). Free memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: -386.8 MB). Peak memory consumption was 164.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:44:02,146 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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. [2018-09-28 10:44:02,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.43 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. [2018-09-28 10:44:02,147 INFO L168 Benchmark]: Boogie Preprocessor took 23.62 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. [2018-09-28 10:44:02,147 INFO L168 Benchmark]: RCFGBuilder took 307.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:44:02,148 INFO L168 Benchmark]: TraceAbstraction took 258389.99 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 335.0 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -407.9 MB). Peak memory consumption was 143.6 MB. Max. memory is 7.1 GB. [2018-09-28 10:44:02,151 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 0.19 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 42.43 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 23.62 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 307.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 258389.99 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 335.0 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -407.9 MB). Peak memory consumption was 143.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while BasicCegarLoop was constructing difference of abstraction (34states) and FLOYD_HOARE automaton (currently 11 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (35 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 258.3s OverallTime, 345 OverallIterations, 8 TraceHistogramMax, 148.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1380 SDtfs, 2605 SDslu, 4625 SDs, 0 SdLazy, 7875 SolverSat, 4380 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8152 GetRequests, 5549 SyntacticMatches, 0 SemanticMatches, 2603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=256, 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: 53.3s AutomataMinimizationTime, 344 MinimizatonAttempts, 5078 StatesRemovedByMinimization, 344 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 41.4s InterpolantComputationTime, 11099 NumberOfCodeBlocks, 11099 NumberOfCodeBlocksAsserted, 1929 NumberOfCheckSat, 10410 ConstructedInterpolants, 0 QuantifiedInterpolants, 467400 SizeOfPredicates, 344 NumberOfNonLiveVariables, 14386 ConjunctsInSsa, 2946 ConjunctsInUnsatCore, 689 InterpolantComputations, 1 PerfectInterpolantSequences, 0/30964 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/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-44-02-161.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-44-02-161.csv Completed graceful shutdown