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.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:54:23,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:54:23,515 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:54:23,532 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:54:23,533 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:54:23,534 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:54:23,537 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:54:23,540 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:54:23,542 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:54:23,543 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:54:23,546 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:54:23,547 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:54:23,548 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:54:23,551 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:54:23,552 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:54:23,553 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:54:23,561 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:54:23,565 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:54:23,568 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:54:23,569 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:54:23,572 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:54:23,573 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:54:23,575 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-03 08:54:23,576 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-03 08:54:23,576 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-03 08:54:23,579 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-03 08:54:23,580 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-03 08:54:23,581 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-03 08:54:23,582 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-03 08:54:23,584 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-03 08:54:23,584 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-03 08:54:23,586 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-03 08:54:23,589 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:54:23,617 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:54:23,617 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:54:23,618 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:54:23,619 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:54:23,619 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:54:23,619 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:54:23,620 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:54:23,620 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:54:23,620 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:54:23,620 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:54:23,621 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:54:23,621 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:54:23,622 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:54:23,622 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:54:23,622 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:54:23,622 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:54:23,622 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:54:23,623 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:54:23,623 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:54:23,623 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:54:23,623 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:54:23,625 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:54:23,625 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:54:23,625 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:54:23,625 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:54:23,625 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:54:23,626 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:54:23,626 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:54:23,626 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:54:23,626 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:54:23,700 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:54:23,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:54:23,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:54:23,723 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:54:23,724 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:54:23,725 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl [2018-10-03 08:54:23,725 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl' [2018-10-03 08:54:23,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:54:23,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:54:23,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:54:23,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:54:23,782 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:54:23,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,821 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:54:23,821 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:54:23,821 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:54:23,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:54:23,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:54:23,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:54:23,825 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:54:23,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... [2018-10-03 08:54:23,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:54:23,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:54:23,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:54:23,849 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:54:23,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:54:23,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-03 08:54:23,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-03 08:54:23,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-03 08:54:24,084 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:54:24,085 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:54:24 BoogieIcfgContainer [2018-10-03 08:54:24,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:54:24,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:54:24,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:54:24,089 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:54:24,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:54:23" (1/2) ... [2018-10-03 08:54:24,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631fe28f and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:54:24, skipping insertion in model container [2018-10-03 08:54:24,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:54:24" (2/2) ... [2018-10-03 08:54:24,093 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl [2018-10-03 08:54:24,103 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:54:24,111 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:54:24,162 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:54:24,163 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:54:24,163 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:54:24,163 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:54:24,163 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:54:24,164 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:54:24,164 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:54:24,164 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:54:24,164 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:54:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-03 08:54:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:54:24,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:24,187 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:54:24,188 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:24,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-03 08:54:24,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:24,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,341 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:54:24,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:54:24,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:54:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:54:24,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:54:24,362 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-03 08:54:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:24,419 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-03 08:54:24,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:54:24,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 08:54:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:24,433 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:54:24,433 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 08:54:24,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:54:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 08:54:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 08:54:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 08:54:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 08:54:24,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 08:54:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:24,474 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 08:54:24,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:54:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 08:54:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:54:24,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:24,475 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:54:24,475 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:24,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-03 08:54:24,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:24,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:24,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:24,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:24,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:24,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:54:24,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:54:24,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:54:24,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:54:24,707 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-03 08:54:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:24,798 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 08:54:24,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:54:24,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-03 08:54:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:24,800 INFO L225 Difference]: With dead ends: 8 [2018-10-03 08:54:24,800 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 08:54:24,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:54:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 08:54:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 08:54:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:54:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 08:54:24,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 08:54:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:24,804 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 08:54:24,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:54:24,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 08:54:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:54:24,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:24,805 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-03 08:54:24,805 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:24,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-03 08:54:24,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:24,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:24,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:24,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:25,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:25,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:25,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:25,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:54:25,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:54:25,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:54:25,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:54:25,036 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-03 08:54:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:25,057 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:54:25,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:54:25,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-03 08:54:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:25,061 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:54:25,062 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:54:25,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:54:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:54:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:54:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:54:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:54:25,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 08:54:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:25,066 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:54:25,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:54:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:54:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:54:25,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:25,067 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-03 08:54:25,067 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:25,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-03 08:54:25,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:25,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:25,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:25,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:25,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:25,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:25,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:54:25,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:25,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:25,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:54:25,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:54:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:54:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:54:25,217 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-03 08:54:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:25,289 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:54:25,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:54:25,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-03 08:54:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:25,290 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:54:25,291 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:54:25,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:54:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:54:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:54:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:54:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 08:54:25,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 08:54:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:25,294 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 08:54:25,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:54:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 08:54:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:54:25,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:25,295 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-03 08:54:25,295 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:25,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-03 08:54:25,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:25,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:25,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:25,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:25,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:25,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:25,599 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:25,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:25,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:25,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:54:25,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:54:25,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:54:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:54:25,640 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-03 08:54:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:25,689 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:54:25,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:54:25,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-03 08:54:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:25,691 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:54:25,691 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:54:25,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:54:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:54:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:54:25,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:54:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:54:25,697 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 08:54:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:25,697 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:54:25,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:54:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:54:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:54:25,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:25,699 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-03 08:54:25,699 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:25,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-03 08:54:25,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:25,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:25,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:25,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:25,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:25,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:25,922 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:54:25,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:25,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:25,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:54:25,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:54:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:54:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:54:25,957 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-03 08:54:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:26,010 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 08:54:26,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:54:26,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-03 08:54:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:26,011 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:54:26,011 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:54:26,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:54:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:54:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:54:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:54:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:54:26,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 08:54:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:26,016 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:54:26,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:54:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:54:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:54:26,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:26,017 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-03 08:54:26,017 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:26,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:26,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-03 08:54:26,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:26,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:26,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:26,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:26,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:26,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:26,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:54:26,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:26,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:26,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:26,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:26,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:26,262 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-03 08:54:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:26,334 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:54:26,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:26,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-03 08:54:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:26,335 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:54:26,335 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:54:26,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:54:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:54:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:54:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:54:26,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 08:54:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:26,339 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:54:26,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:54:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:54:26,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:26,341 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-03 08:54:26,341 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:26,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:26,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-03 08:54:26,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:26,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:26,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:26,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:26,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:26,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:26,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:26,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:26,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:26,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:26,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:26,554 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-03 08:54:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:26,799 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 08:54:26,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:26,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-03 08:54:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:26,802 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:54:26,802 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:54:26,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:54:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:54:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:54:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 08:54:26,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 08:54:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:26,806 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 08:54:26,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 08:54:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:54:26,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:26,807 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-03 08:54:26,808 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:26,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-03 08:54:26,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:26,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:26,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:26,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:27,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:27,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:27,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:27,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:27,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:27,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:54:27,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:54:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:54:27,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:54:27,061 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-03 08:54:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:27,099 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:54:27,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:54:27,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-03 08:54:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:27,101 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:54:27,101 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:54:27,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:54:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:54:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:54:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:54:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:54:27,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 08:54:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:27,106 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:54:27,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:54:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:54:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:54:27,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:27,107 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-03 08:54:27,107 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:27,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-03 08:54:27,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:27,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:27,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:27,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:27,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:54:27,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:27,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:27,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:54:27,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:54:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:54:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:54:27,344 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-03 08:54:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:27,404 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 08:54:27,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:54:27,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-03 08:54:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:27,405 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:54:27,405 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:54:27,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:54:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:54:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:54:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:54:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 08:54:27,410 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 08:54:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:27,410 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 08:54:27,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:54:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 08:54:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:54:27,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:27,411 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-03 08:54:27,411 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:27,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-03 08:54:27,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:27,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:27,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:27,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:27,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:27,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:27,751 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:27,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:27,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:27,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:54:27,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:54:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:54:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:54:27,791 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-03 08:54:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:27,851 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:54:27,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:54:27,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-03 08:54:27,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:27,853 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:54:27,853 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:54:27,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:54:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:54:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:54:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:54:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:54:27,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 08:54:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:27,858 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:54:27,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:54:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:54:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:54:27,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:27,859 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-03 08:54:27,859 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:27,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-03 08:54:27,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:27,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:27,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:27,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:28,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:28,090 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:28,103 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:54:28,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:28,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:28,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:54:28,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:54:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:54:28,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:54:28,156 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-03 08:54:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:28,200 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 08:54:28,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:54:28,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-03 08:54:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:28,201 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:54:28,201 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:54:28,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:54:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:54:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:54:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:54:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 08:54:28,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 08:54:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:28,206 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 08:54:28,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:54:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 08:54:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:28,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:28,207 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-03 08:54:28,208 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:28,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-03 08:54:28,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:28,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:28,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:28,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:28,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:28,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:54:28,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:28,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:28,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:54:28,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:54:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:54:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:54:28,491 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-03 08:54:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:28,528 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:54:28,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:54:28,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-03 08:54:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:28,530 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:54:28,530 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:54:28,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:54:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:54:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:54:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:54:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:54:28,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 08:54:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:28,535 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:54:28,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:54:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:54:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:54:28,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:28,536 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-03 08:54:28,536 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:28,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-03 08:54:28,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:28,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:28,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:28,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:28,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:28,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:54:28,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:54:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:54:28,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:54:28,842 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-03 08:54:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:29,057 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 08:54:29,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:54:29,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-03 08:54:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:29,058 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:54:29,059 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:54:29,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:54:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:54:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:54:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:54:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 08:54:29,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 08:54:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:29,066 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 08:54:29,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:54:29,066 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 08:54:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:29,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:29,067 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-03 08:54:29,067 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:29,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-03 08:54:29,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:29,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:29,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:29,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:29,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:29,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:29,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:29,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:29,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:29,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:54:29,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:54:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:54:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:54:29,447 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-03 08:54:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:29,505 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:54:29,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:54:29,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-03 08:54:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:29,506 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:54:29,506 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:54:29,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:54:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:54:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:54:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:54:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:54:29,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 08:54:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:29,511 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:54:29,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:54:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:54:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:54:29,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:29,512 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-03 08:54:29,512 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:29,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-03 08:54:29,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:29,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:29,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:29,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:29,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:29,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:29,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:54:29,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:29,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:29,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:54:29,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:54:29,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:54:29,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:54:29,866 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-03 08:54:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:29,915 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 08:54:29,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:54:29,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-03 08:54:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:29,919 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:54:29,920 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:54:29,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:54:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:54:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:54:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:54:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 08:54:29,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 08:54:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:29,925 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 08:54:29,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:54:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 08:54:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:54:29,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:29,926 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-03 08:54:29,926 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:29,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-03 08:54:29,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:29,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:29,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:29,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:30,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:30,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:30,729 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:30,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:30,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:30,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:54:30,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:54:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:54:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:54:30,761 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-03 08:54:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:30,803 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:54:30,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:54:30,804 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-03 08:54:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:30,804 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:54:30,804 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:54:30,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:54:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:54:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:54:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:54:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:54:30,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 08:54:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:30,809 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:54:30,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:54:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:54:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:54:30,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:30,809 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-03 08:54:30,809 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:30,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-03 08:54:30,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:30,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:30,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:30,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:31,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:31,419 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:31,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:54:31,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:31,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:31,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:54:31,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:54:31,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:54:31,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:54:31,479 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-03 08:54:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:31,552 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 08:54:31,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:54:31,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-03 08:54:31,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:31,552 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:54:31,553 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:54:31,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:54:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:54:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:54:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:54:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 08:54:31,558 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 08:54:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:31,559 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 08:54:31,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:54:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 08:54:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:54:31,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:31,560 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-03 08:54:31,560 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:31,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-03 08:54:31,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:31,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:31,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:31,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:31,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:31,792 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:31,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:54:31,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:31,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:31,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:54:31,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:54:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:54:31,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:54:31,849 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-03 08:54:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:31,901 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:54:31,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:54:31,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-03 08:54:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:31,902 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:54:31,902 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:54:31,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:54:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:54:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:54:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:54:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:54:31,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 08:54:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:31,913 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:54:31,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:54:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:54:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:54:31,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:31,914 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-03 08:54:31,915 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:31,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-03 08:54:31,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:31,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:31,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:31,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:32,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:32,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:32,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:32,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:54:32,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:54:32,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:54:32,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:54:32,506 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-03 08:54:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:32,549 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 08:54:32,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:54:32,549 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-03 08:54:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:32,550 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:54:32,550 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:54:32,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:54:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:54:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:54:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 08:54:32,554 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 08:54:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:32,554 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 08:54:32,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:54:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 08:54:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:54:32,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:32,555 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-03 08:54:32,555 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:32,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-03 08:54:32,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:32,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:32,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:32,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:32,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:32,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:32,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:32,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:32,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:32,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:32,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:54:32,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:54:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:54:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:54:32,924 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-03 08:54:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:33,020 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:54:33,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:54:33,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-03 08:54:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:33,021 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:54:33,021 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:54:33,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:54:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:54:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:54:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:54:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:54:33,025 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 08:54:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:33,026 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:54:33,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:54:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:54:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:54:33,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:33,027 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-03 08:54:33,027 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:33,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:33,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-03 08:54:33,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:33,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:33,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:33,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:33,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:33,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:33,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:33,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:54:33,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:33,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:33,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:33,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:54:33,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:54:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:54:33,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:54:33,573 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-03 08:54:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:33,642 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 08:54:33,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:54:33,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-03 08:54:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:33,645 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:54:33,645 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:54:33,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:54:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:54:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:54:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 08:54:33,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 08:54:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:33,649 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 08:54:33,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:54:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 08:54:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:54:33,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:33,650 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-03 08:54:33,650 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:33,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-03 08:54:33,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:33,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:33,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:33,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:34,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:34,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:34,048 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:34,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:34,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:34,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:54:34,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:54:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:54:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:54:34,092 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-03 08:54:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:34,179 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:54:34,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:54:34,179 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-03 08:54:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:34,180 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:54:34,180 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:54:34,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:54:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:54:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:54:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:54:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:54:34,184 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 08:54:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:34,185 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:54:34,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:54:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:54:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:54:34,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:34,186 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-03 08:54:34,186 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:34,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-03 08:54:34,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:34,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:34,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:34,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:34,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:34,565 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:34,585 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:54:34,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:34,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:34,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:54:34,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:54:34,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:54:34,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:54:34,632 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-03 08:54:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:34,729 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 08:54:34,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:54:34,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-03 08:54:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:34,730 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:54:34,730 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:54:34,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:54:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:54:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:54:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 08:54:34,734 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 08:54:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:34,735 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 08:54:34,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:54:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 08:54:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:54:34,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:34,736 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-03 08:54:34,736 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:34,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:34,736 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-03 08:54:34,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:34,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:34,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:34,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:35,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:35,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:35,501 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:54:35,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:35,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:35,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:54:35,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:54:35,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:54:35,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:54:35,537 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-03 08:54:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:35,620 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:54:35,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:54:35,621 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-03 08:54:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:35,621 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:54:35,622 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:54:35,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:54:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:54:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:54:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:54:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:54:35,626 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 08:54:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:35,626 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:54:35,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:54:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:54:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:54:35,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:35,627 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-03 08:54:35,627 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:35,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:35,628 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-03 08:54:35,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:35,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:35,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:35,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:35,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:36,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:36,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:36,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:36,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:54:36,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:54:36,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:54:36,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:54:36,342 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-03 08:54:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:36,416 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 08:54:36,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:54:36,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-03 08:54:36,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:36,417 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:54:36,418 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:54:36,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:54:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:54:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:54:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 08:54:36,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 08:54:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:36,423 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 08:54:36,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:54:36,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 08:54:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:54:36,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:36,423 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-03 08:54:36,424 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:36,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:36,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-03 08:54:36,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:36,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:36,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:36,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:36,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:37,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:37,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:37,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:37,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:37,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:37,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:54:37,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:54:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:54:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:54:37,828 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-03 08:54:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:38,033 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:54:38,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:54:38,033 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-03 08:54:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:38,034 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:54:38,034 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:54:38,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:54:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:54:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:54:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:54:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:54:38,039 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 08:54:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:38,039 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:54:38,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:54:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:54:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:54:38,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:38,040 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-03 08:54:38,041 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:38,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:38,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-03 08:54:38,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:38,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:38,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:38,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:38,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:38,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:38,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:54:38,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:38,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:38,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:54:38,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:54:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:54:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:54:38,623 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-03 08:54:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:38,669 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 08:54:38,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:54:38,670 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-03 08:54:38,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:38,670 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:54:38,670 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:54:38,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:54:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:54:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:54:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 08:54:38,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 08:54:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:38,676 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 08:54:38,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:54:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 08:54:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:54:38,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:38,676 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-03 08:54:38,677 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:38,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-03 08:54:38,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:38,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:38,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:38,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:39,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:39,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:39,084 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:39,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:39,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:39,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:54:39,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:54:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:54:39,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:54:39,120 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-03 08:54:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:39,182 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:54:39,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:54:39,183 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-03 08:54:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:39,183 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:54:39,184 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:54:39,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:54:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:54:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:54:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:54:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:54:39,188 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 08:54:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:39,189 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:54:39,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:54:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:54:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:54:39,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:39,189 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-03 08:54:39,190 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:39,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-03 08:54:39,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:39,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:39,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:39,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:39,658 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:54:39,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:39,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:39,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:54:39,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:54:39,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:54:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:54:39,694 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-03 08:54:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:39,899 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 08:54:39,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:54:39,900 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-03 08:54:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:39,900 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:54:39,900 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:54:39,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:54:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:54:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:54:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:54:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 08:54:39,904 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 08:54:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:39,905 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 08:54:39,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:54:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 08:54:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:54:39,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:39,905 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-03 08:54:39,906 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:39,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-10-03 08:54:39,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:39,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:39,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:39,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:40,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:40,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:40,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:40,978 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:54:40,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:40,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:41,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:54:41,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:54:41,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:54:41,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:54:41,020 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-03 08:54:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:41,127 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:54:41,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:54:41,128 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-03 08:54:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:41,128 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:41,129 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:41,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:54:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:54:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:54:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:54:41,134 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 08:54:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:41,134 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:54:41,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:54:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:54:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:54:41,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:41,135 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-03 08:54:41,135 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:41,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-10-03 08:54:41,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:41,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:41,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:41,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:41,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:41,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:41,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:41,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:54:41,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:54:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:54:41,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:54:41,690 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-03 08:54:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:41,809 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 08:54:41,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:54:41,810 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-03 08:54:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:41,810 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:54:41,810 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:54:41,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:54:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:54:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:54:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:54:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 08:54:41,815 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 08:54:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:41,816 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 08:54:41,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:54:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 08:54:41,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:54:41,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:41,816 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-03 08:54:41,817 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:41,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-10-03 08:54:41,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:41,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:41,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:41,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:42,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:42,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:42,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:42,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:42,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:42,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:42,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:42,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:54:42,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:54:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:54:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:54:42,484 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-03 08:54:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:42,543 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:54:42,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:54:42,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-03 08:54:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:42,544 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:42,544 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:42,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:54:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:54:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:54:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:54:42,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 08:54:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:42,548 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:54:42,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:54:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:54:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:54:42,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:42,548 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-03 08:54:42,549 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:42,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-10-03 08:54:42,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:42,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:42,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:42,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:43,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:43,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:43,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:54:43,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:43,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:43,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:54:43,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:54:43,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:54:43,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:54:43,213 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-03 08:54:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:43,334 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 08:54:43,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:54:43,334 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-03 08:54:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:43,335 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:54:43,335 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:54:43,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:54:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:54:43,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:54:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:54:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 08:54:43,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 08:54:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:43,339 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 08:54:43,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:54:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 08:54:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:54:43,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:43,339 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-03 08:54:43,339 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:43,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-10-03 08:54:43,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:43,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:43,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:43,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:43,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:43,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:43,960 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:43,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:43,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:43,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:54:43,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:54:43,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:54:43,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:54:43,995 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-03 08:54:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:44,089 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:54:44,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:54:44,090 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-03 08:54:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:44,090 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:44,090 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:44,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:54:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:54:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:54:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:54:44,095 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 08:54:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:44,095 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:54:44,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:54:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:54:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:54:44,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:44,096 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-03 08:54:44,096 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:44,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-10-03 08:54:44,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:44,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:44,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:44,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:44,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:44,673 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:44,704 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:54:44,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:44,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:44,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:44,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:54:44,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:54:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:54:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:54:44,737 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-03 08:54:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:44,814 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 08:54:44,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:54:44,815 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-03 08:54:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:44,815 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:54:44,816 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:54:44,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:54:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:54:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:54:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:54:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 08:54:44,820 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 08:54:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:44,820 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 08:54:44,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:54:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 08:54:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:54:44,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:44,820 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-03 08:54:44,821 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:44,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-10-03 08:54:44,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:44,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:44,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:44,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:45,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:45,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:45,588 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:45,616 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:54:45,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:45,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:45,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:45,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:54:45,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:54:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:54:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:54:45,660 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-03 08:54:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:46,563 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:54:46,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:54:46,564 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-03 08:54:46,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:46,564 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:46,564 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:46,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:54:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:54:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:54:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:54:46,567 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 08:54:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:46,567 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:54:46,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:54:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:54:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:54:46,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:46,568 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-03 08:54:46,569 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:46,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-10-03 08:54:46,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:46,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:46,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:46,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:46,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:47,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:47,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:47,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:47,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:47,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:47,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:54:47,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:54:47,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:54:47,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:54:47,452 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-03 08:54:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:47,534 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 08:54:47,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:54:47,535 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-03 08:54:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:47,535 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:54:47,536 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 08:54:47,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:54:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 08:54:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 08:54:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:54:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 08:54:47,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 08:54:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:47,540 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 08:54:47,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:54:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 08:54:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:54:47,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:47,540 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-03 08:54:47,540 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:47,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-10-03 08:54:47,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:47,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:47,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:47,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:48,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:48,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:48,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:48,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:48,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:48,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:54:48,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:54:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:54:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:54:48,739 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-03 08:54:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:48,941 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:54:48,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:54:48,941 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-03 08:54:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:48,942 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:48,942 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:48,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:54:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:54:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:54:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:54:48,946 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 08:54:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:48,947 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:54:48,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:54:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:54:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:54:48,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:48,947 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-03 08:54:48,948 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:48,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-10-03 08:54:48,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:48,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:48,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:48,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:48,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:49,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:49,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:49,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:49,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:54:49,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:49,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:49,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:49,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:54:49,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:54:49,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:54:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:54:49,750 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-03 08:54:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:49,821 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 08:54:49,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:54:49,822 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-03 08:54:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:49,823 INFO L225 Difference]: With dead ends: 46 [2018-10-03 08:54:49,823 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:54:49,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:54:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:54:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 08:54:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:54:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 08:54:49,826 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 08:54:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:49,826 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 08:54:49,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:54:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 08:54:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:54:49,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:49,827 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-03 08:54:49,828 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:49,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:49,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-10-03 08:54:49,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:49,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:49,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:49,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:50,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:50,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:50,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:50,657 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:50,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:50,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:50,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:50,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:54:50,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:54:50,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:54:50,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:54:50,700 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-03 08:54:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:50,811 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:54:50,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:54:50,812 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-03 08:54:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:50,812 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:50,813 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:50,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:54:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:54:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:54:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:54:50,815 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 08:54:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:50,815 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:54:50,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:54:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:54:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:54:50,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:50,816 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-03 08:54:50,816 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:50,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-10-03 08:54:50,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:50,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:50,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:50,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:51,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:51,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:51,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:51,788 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:54:51,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:51,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:51,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:51,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:54:51,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:54:51,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:54:51,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:54:51,822 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-03 08:54:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:51,877 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 08:54:51,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:54:51,878 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-03 08:54:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:51,878 INFO L225 Difference]: With dead ends: 48 [2018-10-03 08:54:51,879 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:54:51,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:54:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:54:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:54:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:54:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 08:54:51,881 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 08:54:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:51,882 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 08:54:51,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:54:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 08:54:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 08:54:51,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:51,882 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-03 08:54:51,882 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:51,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-10-03 08:54:51,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:51,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:51,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:51,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:51,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:52,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:52,676 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:52,706 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:54:52,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:52,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:52,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:54:52,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:54:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:54:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:54:52,745 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-03 08:54:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:52,816 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:54:52,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:54:52,817 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-03 08:54:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:52,818 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:52,818 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:52,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:54:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:54:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:54:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:54:52,822 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 08:54:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:52,822 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:54:52,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:54:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:54:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:54:52,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:52,823 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-03 08:54:52,823 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:52,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-10-03 08:54:52,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:52,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:52,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:52,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:53,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:53,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:53,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:53,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:53,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:53,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:54:53,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:54:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:54:53,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:54:53,654 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-03 08:54:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:53,744 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 08:54:53,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:54:53,745 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-03 08:54:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:53,746 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:54:53,746 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:54:53,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:54:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:54:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 08:54:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:54:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 08:54:53,748 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 08:54:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:53,749 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 08:54:53,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:54:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 08:54:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:54:53,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:53,749 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-03 08:54:53,750 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:53,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-10-03 08:54:53,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:53,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:53,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:53,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:53,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:54,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:54,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:54,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:54,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:54,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:54,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:54:54,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:54:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:54:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:54:54,767 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-03 08:54:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:54,833 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:54:54,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:54:54,834 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-03 08:54:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:54,835 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:54,835 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:54,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:54:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:54:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:54:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:54:54,839 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 08:54:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:54,839 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:54:54,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:54:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:54:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:54:54,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:54,840 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-03 08:54:54,841 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:54,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-10-03 08:54:54,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:54,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:54,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:54,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:54,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:55,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:55,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:55,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:56,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:54:56,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:56,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:56,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:56,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:54:56,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:54:56,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:54:56,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:54:56,060 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-03 08:54:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:56,453 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 08:54:56,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:54:56,453 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-03 08:54:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:56,454 INFO L225 Difference]: With dead ends: 52 [2018-10-03 08:54:56,454 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:54:56,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:54:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:54:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 08:54:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:54:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 08:54:56,457 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 08:54:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:56,458 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 08:54:56,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:54:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 08:54:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 08:54:56,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:56,459 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-03 08:54:56,459 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:56,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-10-03 08:54:56,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:56,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:56,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:56,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:56,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:57,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:57,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:57,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:57,370 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:57,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:57,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:57,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:57,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:54:57,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:54:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:54:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:54:57,415 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-03 08:54:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:57,519 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:54:57,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:54:57,520 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-03 08:54:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:57,521 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:54:57,521 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:54:57,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:54:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:54:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:54:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:54:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:54:57,524 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 08:54:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:57,524 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:54:57,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:54:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:54:57,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:54:57,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:57,525 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-03 08:54:57,525 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:57,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-10-03 08:54:57,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:57,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:57,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:57,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:57,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:58,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:58,554 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:58,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:54:58,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:58,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:58,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:54:58,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:54:58,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:54:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:54:58,639 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-03 08:54:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:58,715 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 08:54:58,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:54:58,716 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-03 08:54:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:58,717 INFO L225 Difference]: With dead ends: 54 [2018-10-03 08:54:58,717 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 08:54:58,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:54:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 08:54:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 08:54:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:54:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 08:54:58,721 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 08:54:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:58,722 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 08:54:58,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:54:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 08:54:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:54:58,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:58,723 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-03 08:54:58,723 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:58,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:58,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-10-03 08:54:58,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:58,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:58,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:58,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:58,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:59,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:59,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:59,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:59,755 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:54:59,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:59,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:59,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:59,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:54:59,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:54:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:54:59,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:54:59,794 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-03 08:54:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:59,887 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:54:59,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:54:59,888 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-03 08:54:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:59,889 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:59,889 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:59,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:54:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:54:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:54:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:54:59,894 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 08:54:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:59,894 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:54:59,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:54:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:54:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:54:59,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:59,895 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-03 08:54:59,895 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:59,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-10-03 08:54:59,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:59,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:59,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:59,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:02,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:02,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:02,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:02,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:02,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:02,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:55:02,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:55:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:55:02,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:55:02,410 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-03 08:55:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:02,501 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 08:55:02,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:55:02,501 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-03 08:55:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:02,502 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:55:02,502 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:55:02,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:55:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:55:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 08:55:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:55:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 08:55:02,507 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 08:55:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:02,507 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 08:55:02,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:55:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 08:55:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:55:02,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:02,508 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-03 08:55:02,508 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:02,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-10-03 08:55:02,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:02,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:02,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:03,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:03,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:03,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:03,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:03,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:03,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:03,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:03,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:55:03,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:55:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:55:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:55:03,838 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-03 08:55:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:03,948 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:55:03,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:55:03,949 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-03 08:55:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:03,950 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:03,950 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:03,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:55:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:55:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:55:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:55:03,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 08:55:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:03,954 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:55:03,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:55:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:55:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:55:03,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:03,954 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-03 08:55:03,955 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:03,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-10-03 08:55:03,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:03,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:03,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:03,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:03,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:05,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:05,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:05,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:05,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:55:05,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:05,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:05,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:05,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:55:05,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:55:05,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:55:05,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:55:05,265 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-03 08:55:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:05,438 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 08:55:05,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:55:05,439 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-03 08:55:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:05,440 INFO L225 Difference]: With dead ends: 58 [2018-10-03 08:55:05,440 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:55:05,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:55:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:55:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:55:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:55:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 08:55:05,443 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 08:55:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:05,443 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 08:55:05,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:55:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 08:55:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:55:05,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:05,444 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-03 08:55:05,444 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:05,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:05,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-10-03 08:55:05,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:05,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:05,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:05,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:05,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:06,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:06,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:06,938 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:06,973 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:06,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:06,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:07,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:07,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:55:07,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:55:07,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:55:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:55:07,023 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-03 08:55:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:07,282 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:55:07,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:55:07,283 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-03 08:55:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:07,285 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:55:07,285 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:55:07,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:55:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:55:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:55:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:55:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:55:07,288 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 08:55:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:07,289 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:55:07,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:55:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:55:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:55:07,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:07,289 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-03 08:55:07,290 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:07,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-10-03 08:55:07,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:07,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:07,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:07,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:07,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:08,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:08,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:08,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:08,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:55:08,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:08,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:08,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:08,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:55:08,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:55:08,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:55:08,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:55:08,540 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-03 08:55:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:08,649 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 08:55:08,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:55:08,650 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-03 08:55:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:08,651 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:55:08,651 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:55:08,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:55:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:55:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 08:55:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:55:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 08:55:08,654 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 08:55:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:08,655 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 08:55:08,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:55:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 08:55:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:55:08,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:08,655 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-03 08:55:08,655 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:08,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-10-03 08:55:08,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:08,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:08,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:08,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:09,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:09,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:09,847 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:09,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 08:55:09,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:09,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:09,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:09,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:55:09,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:55:09,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:55:09,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:55:09,931 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-03 08:55:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:10,099 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:55:10,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:55:10,100 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-03 08:55:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:10,100 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:10,101 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:10,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:55:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:55:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:55:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:55:10,103 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 08:55:10,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:10,104 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:55:10,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:55:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:55:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:55:10,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:10,104 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-03 08:55:10,105 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:10,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-10-03 08:55:10,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:10,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:10,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:10,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:10,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:11,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:11,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:11,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:11,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:11,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:11,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:55:11,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:55:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:55:11,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:55:11,409 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-03 08:55:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:11,546 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 08:55:11,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:55:11,547 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-03 08:55:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:11,547 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:55:11,547 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 08:55:11,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:55:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 08:55:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 08:55:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:55:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 08:55:11,550 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 08:55:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:11,551 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 08:55:11,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:55:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 08:55:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 08:55:11,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:11,551 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-03 08:55:11,552 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:11,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-10-03 08:55:11,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:11,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:11,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:11,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:11,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:12,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:12,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:12,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:12,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:12,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:12,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:12,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:12,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:55:12,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:55:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:55:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:55:12,995 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-03 08:55:13,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:13,102 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:55:13,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:55:13,102 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-03 08:55:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:13,103 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:55:13,103 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:55:13,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:55:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:55:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:55:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:55:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:55:13,107 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 08:55:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:13,107 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:55:13,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:55:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:55:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:55:13,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:13,108 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-03 08:55:13,108 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:13,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-10-03 08:55:13,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:13,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:13,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:13,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:13,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:14,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:14,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:14,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:55:14,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:14,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:14,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:55:14,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:55:14,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:55:14,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:55:14,461 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-03 08:55:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:14,580 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 08:55:14,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:55:14,580 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-03 08:55:14,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:14,581 INFO L225 Difference]: With dead ends: 64 [2018-10-03 08:55:14,581 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 08:55:14,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:55:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 08:55:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 08:55:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 08:55:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 08:55:14,585 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 08:55:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:14,585 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 08:55:14,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:55:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 08:55:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 08:55:14,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:14,586 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-03 08:55:14,586 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:14,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:14,587 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-10-03 08:55:14,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:14,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:14,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:14,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:14,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:16,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:16,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:16,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:16,731 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:16,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:16,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:16,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:16,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:55:16,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:55:16,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:55:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:55:16,776 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-03 08:55:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:16,907 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:55:16,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:55:16,908 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-03 08:55:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:16,908 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:55:16,908 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:55:16,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:55:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:55:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:55:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:55:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:55:16,912 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 08:55:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:16,912 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:55:16,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:55:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:55:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:55:16,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:16,913 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-03 08:55:16,913 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:16,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-10-03 08:55:16,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:16,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:16,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:16,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:16,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:18,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:18,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:18,468 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:55:18,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:18,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:18,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:55:18,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:55:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:55:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:55:18,516 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-03 08:55:18,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:18,642 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 08:55:18,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:55:18,642 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-03 08:55:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:18,643 INFO L225 Difference]: With dead ends: 66 [2018-10-03 08:55:18,643 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 08:55:18,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:55:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 08:55:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 08:55:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:55:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 08:55:18,646 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 08:55:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:18,647 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 08:55:18,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:55:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 08:55:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:55:18,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:18,647 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-03 08:55:18,648 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:18,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:18,648 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-10-03 08:55:18,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:18,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:18,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:18,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:20,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:20,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:20,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:20,309 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:55:20,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:20,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:20,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:20,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:55:20,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:55:20,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:55:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:55:20,351 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-03 08:55:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:20,466 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:55:20,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:55:20,466 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-03 08:55:20,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:20,467 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:55:20,467 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:55:20,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:55:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:55:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:55:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:55:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:55:20,470 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 08:55:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:20,471 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:55:20,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:55:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:55:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:55:20,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:20,471 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-03 08:55:20,471 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:20,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:20,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-10-03 08:55:20,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:20,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:20,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:20,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:20,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:22,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:22,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:22,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:22,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:22,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:22,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:55:22,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:55:22,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:55:22,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:55:22,494 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-03 08:55:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:22,606 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 08:55:22,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:55:22,607 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-03 08:55:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:22,608 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:55:22,608 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 08:55:22,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:55:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 08:55:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 08:55:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:55:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 08:55:22,611 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 08:55:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:22,611 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 08:55:22,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:55:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 08:55:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 08:55:22,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:22,611 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-03 08:55:22,611 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:22,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:22,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-10-03 08:55:22,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:22,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:22,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:22,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:25,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:25,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:25,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:26,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:26,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:26,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:26,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:26,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:55:26,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:55:26,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:55:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:55:26,054 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-03 08:55:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:26,235 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:55:26,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:55:26,242 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-03 08:55:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:26,242 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:55:26,242 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:55:26,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:55:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:55:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:55:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:55:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:55:26,245 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 08:55:26,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:26,245 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:55:26,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:55:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:55:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:55:26,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:26,246 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-03 08:55:26,246 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:26,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:26,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-10-03 08:55:26,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:26,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:26,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:26,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:28,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:28,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:28,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:28,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:55:28,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:28,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:28,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:28,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:55:28,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:55:28,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:55:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:55:28,221 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-03 08:55:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:28,380 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 08:55:28,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:55:28,380 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-03 08:55:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:28,381 INFO L225 Difference]: With dead ends: 70 [2018-10-03 08:55:28,381 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:55:28,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:55:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:55:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 08:55:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 08:55:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 08:55:28,384 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 08:55:28,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:28,384 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 08:55:28,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:55:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 08:55:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 08:55:28,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:28,385 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-03 08:55:28,385 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:28,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-10-03 08:55:28,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:28,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:28,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:28,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:28,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:30,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:30,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:30,876 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:30,931 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:30,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:30,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:30,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:30,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:55:30,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:55:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:55:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:55:30,980 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-03 08:55:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:31,331 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:55:31,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:55:31,332 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-03 08:55:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:31,333 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:55:31,333 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:55:31,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:55:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:55:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:55:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:55:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:55:31,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 08:55:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:31,337 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:55:31,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:55:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:55:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:55:31,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:31,338 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-03 08:55:31,338 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:31,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-10-03 08:55:31,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:31,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:31,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:31,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:31,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:33,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:33,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:33,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:55:33,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:33,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:33,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:55:33,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:55:33,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:55:33,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:55:33,718 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-03 08:55:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:33,823 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-03 08:55:33,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:55:33,823 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-03 08:55:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:33,824 INFO L225 Difference]: With dead ends: 72 [2018-10-03 08:55:33,824 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 08:55:33,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:55:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 08:55:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 08:55:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:55:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-03 08:55:33,827 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-03 08:55:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:33,828 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-03 08:55:33,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:55:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-03 08:55:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 08:55:33,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:33,828 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-03 08:55:33,828 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:33,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:33,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-10-03 08:55:33,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:33,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:33,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:33,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:33,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:35,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:35,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:35,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:35,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-03 08:55:35,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:35,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:35,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:35,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:55:35,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:55:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:55:35,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:55:35,623 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-03 08:55:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:36,704 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:55:36,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:55:36,704 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-03 08:55:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:36,705 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:55:36,705 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:55:36,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:55:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:55:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:55:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:55:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:55:36,708 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-03 08:55:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:36,709 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:55:36,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:55:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:55:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:55:36,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:36,709 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-03 08:55:36,710 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:36,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-10-03 08:55:36,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:36,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:36,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:36,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:36,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:38,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:38,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:38,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:38,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:38,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:38,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:55:38,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:55:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:55:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:55:38,697 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-03 08:55:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:38,846 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-03 08:55:38,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:55:38,846 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-03 08:55:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:38,847 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:55:38,847 INFO L226 Difference]: Without dead ends: 72 [2018-10-03 08:55:38,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:55:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-03 08:55:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-03 08:55:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 08:55:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-03 08:55:38,851 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-03 08:55:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:38,852 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-03 08:55:38,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:55:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-03 08:55:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 08:55:38,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:38,852 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-03 08:55:38,853 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:38,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-10-03 08:55:38,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:38,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:38,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:38,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:38,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:40,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:40,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:40,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:40,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:40,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:40,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:40,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:40,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:55:40,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:55:40,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:55:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:55:40,770 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-03 08:55:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:40,878 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:55:40,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:55:40,878 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-03 08:55:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:40,879 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:55:40,879 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:55:40,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:55:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:55:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:55:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:55:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:55:40,882 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-03 08:55:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:40,883 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:55:40,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:55:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:55:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:55:40,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:40,884 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-03 08:55:40,884 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:40,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:40,884 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-03 08:55:40,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:40,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:40,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:40,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:40,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:42,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:42,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:42,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:43,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:55:43,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:43,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:43,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:43,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:55:43,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:55:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:55:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:55:43,100 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-03 08:55:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:43,455 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-03 08:55:43,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:55:43,455 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-03 08:55:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:43,456 INFO L225 Difference]: With dead ends: 76 [2018-10-03 08:55:43,456 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:55:43,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:55:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:55:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-03 08:55:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:55:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-03 08:55:43,461 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-03 08:55:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:43,461 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-03 08:55:43,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:55:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-03 08:55:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:55:43,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:43,462 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-03 08:55:43,462 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:43,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-03 08:55:43,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:43,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:43,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:43,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:43,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:45,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:45,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:45,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:45,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:45,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:45,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:45,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:45,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:55:45,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:55:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:55:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:55:45,390 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-03 08:55:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:45,623 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:55:45,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:55:45,624 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-03 08:55:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:45,625 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:55:45,625 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:55:45,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:55:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:55:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:55:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:55:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:55:45,629 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-03 08:55:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:45,629 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:55:45,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:55:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:55:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:55:45,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:45,630 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-03 08:55:45,630 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:45,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-03 08:55:45,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:45,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:45,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:45,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:45,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:47,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:47,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:47,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:47,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:55:47,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:47,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:47,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:47,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:55:47,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:55:47,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:55:47,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:55:47,931 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-03 08:55:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:48,078 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-03 08:55:48,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:55:48,079 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-03 08:55:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:48,080 INFO L225 Difference]: With dead ends: 78 [2018-10-03 08:55:48,080 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 08:55:48,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:55:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 08:55:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 08:55:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:55:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-03 08:55:48,084 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-03 08:55:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:48,084 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-03 08:55:48,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:55:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-03 08:55:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-03 08:55:48,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:48,085 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-03 08:55:48,085 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:48,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-03 08:55:48,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:48,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:48,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:48,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:48,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:50,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:50,109 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:50,208 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:55:50,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:50,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:50,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:55:50,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:55:50,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:55:50,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:55:50,249 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-03 08:55:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:50,396 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:55:50,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:55:50,397 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-03 08:55:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:50,398 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:55:50,398 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:55:50,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:55:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:55:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:55:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:55:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:55:50,402 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-03 08:55:50,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:50,402 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:55:50,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:55:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:55:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:55:50,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:50,403 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-03 08:55:50,403 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:50,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:50,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-03 08:55:50,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:50,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:50,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:50,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:50,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:53,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:53,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:53,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:53,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:53,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:53,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:55:53,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:55:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:55:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:55:53,216 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-03 08:55:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:53,327 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-03 08:55:53,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:55:53,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-03 08:55:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:53,329 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:55:53,329 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 08:55:53,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:55:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 08:55:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-03 08:55:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 08:55:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-03 08:55:53,333 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-03 08:55:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:53,333 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-03 08:55:53,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:55:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-03 08:55:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 08:55:53,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:53,334 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-03 08:55:53,334 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:53,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-03 08:55:53,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:53,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:53,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:53,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:53,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:55,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:55,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:55,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:55,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:55,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:55,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:55,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:55,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:55:55,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:55:55,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:55:55,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:55:55,533 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-03 08:55:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:55,699 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:55:55,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:55:55,699 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-03 08:55:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:55,700 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:55:55,700 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:55:55,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:55:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:55:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:55:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:55:55,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:55:55,704 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-03 08:55:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:55,704 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:55:55,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:55:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:55:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:55:55,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:55,705 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-03 08:55:55,705 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:55,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-03 08:55:55,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:55,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:55,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:55,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:55,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:58,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:58,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:58,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:58,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:55:58,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:58,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:58,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:58,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:55:58,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:55:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:55:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:55:58,204 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-03 08:55:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:58,373 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-03 08:55:58,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:55:58,373 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-03 08:55:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:58,374 INFO L225 Difference]: With dead ends: 82 [2018-10-03 08:55:58,374 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 08:55:58,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:55:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 08:55:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-03 08:55:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:55:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-03 08:55:58,378 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-03 08:55:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:58,378 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-03 08:55:58,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:55:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-03 08:55:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 08:55:58,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:58,378 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-03 08:55:58,379 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:58,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-03 08:55:58,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:58,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:58,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:58,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:58,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:00,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:00,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:00,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:00,497 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:00,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:00,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:00,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:00,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:56:00,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:56:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:56:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:56:00,536 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-03 08:56:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:01,839 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:56:01,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:56:01,840 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-03 08:56:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:01,840 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:56:01,841 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:56:01,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:56:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:56:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:56:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:56:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:56:01,844 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-03 08:56:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:01,844 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:56:01,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:56:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:56:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:56:01,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:01,845 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-03 08:56:01,845 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:01,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:01,845 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-03 08:56:01,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:01,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:01,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:01,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:01,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:04,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:04,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:04,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:04,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:56:04,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:04,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:04,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:04,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:56:04,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:56:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:56:04,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:56:04,965 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-03 08:56:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:05,241 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-03 08:56:05,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:56:05,242 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-03 08:56:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:05,243 INFO L225 Difference]: With dead ends: 84 [2018-10-03 08:56:05,243 INFO L226 Difference]: Without dead ends: 82 [2018-10-03 08:56:05,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:56:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-03 08:56:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-03 08:56:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 08:56:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-03 08:56:05,246 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-03 08:56:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:05,246 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-03 08:56:05,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:56:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-03 08:56:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-03 08:56:05,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:05,247 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-03 08:56:05,247 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:05,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:05,247 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-03 08:56:05,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:05,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:05,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:05,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:05,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:08,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:08,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:08,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:08,197 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-03 08:56:08,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:08,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:08,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:08,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:56:08,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:56:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:56:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:56:08,256 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-03 08:56:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:08,477 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:56:08,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:56:08,477 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-03 08:56:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:08,478 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:56:08,479 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:56:08,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:56:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:56:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:56:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:56:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:56:08,483 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-03 08:56:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:08,483 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:56:08,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:56:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:56:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:56:08,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:08,484 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-03 08:56:08,484 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:08,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:08,484 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-03 08:56:08,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:08,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:08,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:08,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:08,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:10,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:10,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:10,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:10,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:10,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:10,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:56:10,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:56:10,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:56:10,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:56:10,900 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-03 08:56:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:11,078 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-03 08:56:11,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:56:11,078 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-03 08:56:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:11,079 INFO L225 Difference]: With dead ends: 86 [2018-10-03 08:56:11,079 INFO L226 Difference]: Without dead ends: 84 [2018-10-03 08:56:11,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:56:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-03 08:56:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-03 08:56:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:56:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-03 08:56:11,083 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-03 08:56:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:11,083 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-03 08:56:11,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:56:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-03 08:56:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:56:11,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:11,084 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-03 08:56:11,084 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:11,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-03 08:56:11,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:11,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:11,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:11,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:11,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:14,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:14,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:14,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:14,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:14,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:14,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:14,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:14,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:56:14,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:56:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:56:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:56:14,096 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-03 08:56:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:14,270 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-03 08:56:14,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:56:14,270 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-03 08:56:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:14,271 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:56:14,271 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:56:14,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:56:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:56:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:56:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:56:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-03 08:56:14,275 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-03 08:56:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:14,276 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-03 08:56:14,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:56:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-03 08:56:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:56:14,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:14,276 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-03 08:56:14,277 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:14,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-03 08:56:14,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:14,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:14,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:14,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:14,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:16,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:16,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:16,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:16,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-03 08:56:16,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:16,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:16,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:16,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:56:16,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:56:16,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:56:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:56:16,837 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-03 08:56:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:18,047 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-03 08:56:18,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:56:18,047 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-03 08:56:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:18,048 INFO L225 Difference]: With dead ends: 88 [2018-10-03 08:56:18,048 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 08:56:18,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:56:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 08:56:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-03 08:56:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 08:56:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-03 08:56:18,051 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-03 08:56:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:18,051 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-03 08:56:18,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:56:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-03 08:56:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-03 08:56:18,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:18,052 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-03 08:56:18,052 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:18,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:18,053 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-03 08:56:18,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:18,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:18,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:18,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:18,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:20,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:20,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:20,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:20,592 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:20,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:20,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:20,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:20,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:56:20,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:56:20,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:56:20,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:56:20,653 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-03 08:56:21,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:21,034 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:56:21,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:56:21,035 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-03 08:56:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:21,036 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:56:21,036 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:56:21,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:56:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:56:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:56:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:56:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:56:21,040 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-03 08:56:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:21,040 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:56:21,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:56:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:56:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:56:21,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:21,040 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-03 08:56:21,041 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:21,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-03 08:56:21,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:21,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:21,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:21,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:21,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:23,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:23,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:23,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:23,866 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 08:56:23,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:23,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:23,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:23,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:56:23,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:56:23,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:56:23,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:56:23,907 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-03 08:56:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:24,107 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-03 08:56:24,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:56:24,108 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-03 08:56:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:24,109 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:56:24,109 INFO L226 Difference]: Without dead ends: 88 [2018-10-03 08:56:24,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:56:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-03 08:56:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-03 08:56:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 08:56:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-03 08:56:24,113 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-03 08:56:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:24,113 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-03 08:56:24,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:56:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-03 08:56:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-03 08:56:24,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:24,113 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-03 08:56:24,114 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:24,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-03 08:56:24,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:24,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:24,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:24,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:24,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:26,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:26,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:26,686 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:26,759 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:56:26,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:26,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:26,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:26,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:56:26,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:56:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:56:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:56:26,799 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-03 08:56:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:26,938 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-03 08:56:26,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:56:26,939 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-03 08:56:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:26,939 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:56:26,940 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:56:26,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:56:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:56:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:56:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:56:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-03 08:56:26,944 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-03 08:56:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:26,944 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-03 08:56:26,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:56:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-03 08:56:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:56:26,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:26,945 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-03 08:56:26,945 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:26,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-03 08:56:26,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:26,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:26,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:30,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:30,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:30,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:30,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:30,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:30,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:56:30,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:56:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:56:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:56:30,158 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-03 08:56:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:30,315 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-03 08:56:30,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:56:30,316 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-03 08:56:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:30,317 INFO L225 Difference]: With dead ends: 92 [2018-10-03 08:56:30,317 INFO L226 Difference]: Without dead ends: 90 [2018-10-03 08:56:30,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:56:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-03 08:56:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-03 08:56:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-03 08:56:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-03 08:56:30,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-03 08:56:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:30,320 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-03 08:56:30,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:56:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-03 08:56:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-03 08:56:30,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:30,321 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-03 08:56:30,321 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:30,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-03 08:56:30,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:30,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:30,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:30,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:30,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:33,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:33,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:33,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:33,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:33,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:33,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:33,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:33,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:56:33,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:56:33,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:56:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:56:33,161 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-03 08:56:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:33,407 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:56:33,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:56:33,407 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-03 08:56:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:33,408 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:56:33,408 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:56:33,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:56:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:56:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:56:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:56:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:56:33,411 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-03 08:56:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:33,411 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:56:33,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:56:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:56:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:56:33,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:33,412 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-03 08:56:33,412 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:33,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:33,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-03 08:56:33,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:33,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:33,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:33,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:36,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:36,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:36,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:36,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-03 08:56:36,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:36,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:36,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:36,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:56:36,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:56:36,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:56:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:56:36,406 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-03 08:56:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:36,609 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-03 08:56:36,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:56:36,610 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-03 08:56:36,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:36,611 INFO L225 Difference]: With dead ends: 94 [2018-10-03 08:56:36,611 INFO L226 Difference]: Without dead ends: 92 [2018-10-03 08:56:36,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:56:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-03 08:56:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-03 08:56:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-03 08:56:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-03 08:56:36,614 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-03 08:56:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:36,614 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-03 08:56:36,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:56:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-03 08:56:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-03 08:56:36,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:36,615 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-03 08:56:36,615 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:36,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-03 08:56:36,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:36,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:36,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:36,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:36,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:39,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:39,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:39,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:39,831 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:39,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:39,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:39,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:39,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:56:39,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:56:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:56:39,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:56:39,873 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-03 08:56:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:39,996 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-03 08:56:39,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:56:39,997 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-03 08:56:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:39,998 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:56:39,998 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:56:39,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:56:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:56:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:56:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:56:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-03 08:56:40,001 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-03 08:56:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:40,002 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-03 08:56:40,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:56:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-03 08:56:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:56:40,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:40,003 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-03 08:56:40,003 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:40,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-03 08:56:40,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:40,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:40,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:40,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:40,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:42,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:42,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:42,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:43,038 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 08:56:43,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:43,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:43,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:43,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:56:43,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:56:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:56:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:56:43,100 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-03 08:56:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:43,372 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-03 08:56:43,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:56:43,373 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-03 08:56:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:43,374 INFO L225 Difference]: With dead ends: 96 [2018-10-03 08:56:43,374 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 08:56:43,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:56:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 08:56:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-03 08:56:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:56:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-03 08:56:43,377 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-03 08:56:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:43,377 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-03 08:56:43,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:56:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-03 08:56:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:56:43,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:43,378 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-03 08:56:43,378 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:43,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-03 08:56:43,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:43,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:43,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:43,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:43,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:46,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:46,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:46,704 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:46,787 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-03 08:56:46,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:46,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:46,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:46,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:56:46,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:56:46,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:56:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:56:46,828 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-03 08:56:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:47,045 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:56:47,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:56:47,046 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-03 08:56:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:47,047 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:56:47,047 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:56:47,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:56:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:56:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:56:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:56:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:56:47,051 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-03 08:56:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:47,051 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:56:47,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:56:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:56:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:56:47,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:47,052 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-03 08:56:47,052 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:47,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-03 08:56:47,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:47,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:47,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:47,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:47,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:50,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:50,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:50,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:50,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:50,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:50,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:56:50,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:56:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:56:50,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:56:50,463 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-03 08:56:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:50,640 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-03 08:56:50,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:56:50,641 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-03 08:56:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:50,641 INFO L225 Difference]: With dead ends: 98 [2018-10-03 08:56:50,642 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 08:56:50,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:56:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 08:56:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-03 08:56:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-03 08:56:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-03 08:56:50,645 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-03 08:56:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:50,645 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-03 08:56:50,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:56:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-03 08:56:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-03 08:56:50,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:50,646 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-03 08:56:50,646 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:50,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-03 08:56:50,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:50,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:50,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:50,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:50,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:54,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:54,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:54,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:54,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:54,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:54,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:54,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:54,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:56:54,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:56:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:56:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:56:54,651 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-03 08:56:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:54,820 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-03 08:56:54,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:56:54,820 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-03 08:56:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:54,821 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:56:54,821 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:56:54,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:56:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:56:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:56:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:56:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-03 08:56:54,825 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-03 08:56:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:54,825 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-03 08:56:54,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:56:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-03 08:56:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:56:54,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:54,833 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-03 08:56:54,833 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:54,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-03 08:56:54,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:54,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:54,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:54,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:58,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:58,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:58,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-03 08:56:58,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:58,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:58,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:56:58,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:56:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:56:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:56:58,235 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-03 08:56:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:58,407 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-03 08:56:58,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:56:58,407 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-03 08:56:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:58,408 INFO L225 Difference]: With dead ends: 100 [2018-10-03 08:56:58,408 INFO L226 Difference]: Without dead ends: 98 [2018-10-03 08:56:58,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:56:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-03 08:56:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-03 08:56:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-03 08:56:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-03 08:56:58,412 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-03 08:56:58,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:58,412 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-03 08:56:58,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:56:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-03 08:56:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-03 08:56:58,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:58,413 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-03 08:56:58,413 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:58,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-03 08:56:58,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:58,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:01,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:01,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:02,002 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:02,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:02,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:02,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:57:02,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:57:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:57:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:57:02,065 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-03 08:57:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:02,304 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:57:02,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:57:02,305 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-03 08:57:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:02,306 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:57:02,306 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:57:02,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:57:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:57:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:57:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:57:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:57:02,309 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-03 08:57:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:02,310 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:57:02,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:57:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:57:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:57:02,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:02,311 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-03 08:57:02,311 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:02,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-03 08:57:02,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:02,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:02,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:02,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:06,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:06,088 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:06,179 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 08:57:06,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:06,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:06,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:57:06,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:57:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:57:06,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:57:06,223 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-03 08:57:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:06,417 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-03 08:57:06,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:57:06,417 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-03 08:57:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:06,418 INFO L225 Difference]: With dead ends: 102 [2018-10-03 08:57:06,419 INFO L226 Difference]: Without dead ends: 100 [2018-10-03 08:57:06,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:57:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-03 08:57:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-03 08:57:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 08:57:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-03 08:57:06,423 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-03 08:57:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:06,423 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-03 08:57:06,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:57:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-03 08:57:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-03 08:57:06,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:06,424 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-03 08:57:06,424 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:06,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:06,424 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-03 08:57:06,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:06,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:06,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:06,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:06,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:09,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:09,977 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:10,066 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:57:10,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:10,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:10,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:10,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:57:10,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:57:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:57:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:57:10,110 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-03 08:57:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:10,331 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-03 08:57:10,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:57:10,332 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-03 08:57:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:10,333 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:57:10,333 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:57:10,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:57:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:57:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:57:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:57:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-03 08:57:10,336 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-03 08:57:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:10,336 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-03 08:57:10,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:57:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-03 08:57:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:57:10,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:10,337 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-03 08:57:10,337 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:10,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:10,337 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-03 08:57:10,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:10,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:10,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:10,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:10,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:13,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:13,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:13,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:13,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:57:13,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:57:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:57:13,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:57:13,828 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-03 08:57:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:14,084 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-03 08:57:14,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:57:14,084 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-03 08:57:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:14,085 INFO L225 Difference]: With dead ends: 104 [2018-10-03 08:57:14,085 INFO L226 Difference]: Without dead ends: 102 [2018-10-03 08:57:14,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:57:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-03 08:57:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-03 08:57:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-03 08:57:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-03 08:57:14,088 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-03 08:57:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:14,088 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-03 08:57:14,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:57:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-03 08:57:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-03 08:57:14,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:14,089 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-03 08:57:14,089 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:14,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:14,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-03 08:57:14,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:14,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:14,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:14,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:17,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:17,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:17,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:17,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:17,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:17,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:17,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:17,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-03 08:57:17,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:57:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:57:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:57:17,934 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-03 08:57:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:18,187 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:57:18,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:57:18,188 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-03 08:57:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:18,188 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:57:18,189 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:57:18,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:57:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:57:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:57:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:57:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:57:18,192 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-03 08:57:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:18,192 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:57:18,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:57:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:57:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:57:18,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:18,193 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-03 08:57:18,193 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:18,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-03 08:57:18,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:18,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:18,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:18,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:21,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:21,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:21,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:22,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-03 08:57:22,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:22,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:22,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:22,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:57:22,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:57:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:57:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:57:22,084 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-03 08:57:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:22,275 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-03 08:57:22,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:57:22,276 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-03 08:57:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:22,277 INFO L225 Difference]: With dead ends: 106 [2018-10-03 08:57:22,277 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 08:57:22,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:57:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 08:57:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-03 08:57:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 08:57:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-03 08:57:22,281 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-03 08:57:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:22,281 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-03 08:57:22,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:57:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-03 08:57:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-03 08:57:22,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:22,282 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-03 08:57:22,282 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:22,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:22,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-03 08:57:22,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:22,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:22,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:22,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:22,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:26,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:26,034 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:26,091 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:26,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:26,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:26,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-03 08:57:26,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:57:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:57:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:57:26,136 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-03 08:57:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:26,421 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-03 08:57:26,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:57:26,421 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-03 08:57:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:26,422 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:57:26,422 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:57:26,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:57:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:57:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:57:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:57:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-03 08:57:26,426 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-03 08:57:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:26,426 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-03 08:57:26,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:57:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-03 08:57:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:57:26,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:26,427 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-03 08:57:26,427 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:26,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-03 08:57:26,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:26,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:26,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:26,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:30,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:30,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:30,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-03 08:57:30,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:30,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:30,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:57:30,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:57:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:57:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:57:30,614 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-03 08:57:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:30,784 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-03 08:57:30,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:57:30,785 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-03 08:57:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:30,786 INFO L225 Difference]: With dead ends: 108 [2018-10-03 08:57:30,787 INFO L226 Difference]: Without dead ends: 106 [2018-10-03 08:57:30,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:57:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-03 08:57:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-03 08:57:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 08:57:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-03 08:57:30,792 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-03 08:57:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:30,792 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-03 08:57:30,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:57:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-03 08:57:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-03 08:57:30,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:30,793 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-03 08:57:30,793 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:30,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-03 08:57:30,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:30,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:30,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:30,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:34,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:34,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:34,638 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:34,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-03 08:57:34,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:34,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:34,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:34,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-03 08:57:34,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:57:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:57:34,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:57:34,787 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-03 08:57:35,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:35,126 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:57:35,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:57:35,127 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-03 08:57:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:35,128 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:57:35,128 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:57:35,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:57:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:57:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:57:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:57:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:57:35,132 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-03 08:57:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:35,132 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:57:35,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:57:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:57:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:57:35,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:35,133 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-03 08:57:35,133 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:35,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-03 08:57:35,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:35,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:35,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:35,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:39,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:39,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:39,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:39,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:39,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:39,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:57:39,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:57:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:57:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:57:39,132 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-03 08:57:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:39,361 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-03 08:57:39,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:57:39,361 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-03 08:57:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:39,362 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:57:39,362 INFO L226 Difference]: Without dead ends: 108 [2018-10-03 08:57:39,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:57:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-03 08:57:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-03 08:57:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 08:57:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-03 08:57:39,364 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-03 08:57:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:39,365 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-03 08:57:39,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:57:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-03 08:57:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 08:57:39,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:39,365 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-03 08:57:39,365 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:39,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-03 08:57:39,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:39,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:39,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:39,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:39,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:43,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:43,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:43,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:43,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:43,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:43,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:43,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:43,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-03 08:57:43,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:57:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:57:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:57:43,828 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-03 08:57:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:44,263 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-03 08:57:44,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:57:44,264 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-03 08:57:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:44,264 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:57:44,265 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:57:44,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:57:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:57:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:57:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:57:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-03 08:57:44,269 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-03 08:57:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:44,269 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-03 08:57:44,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:57:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-03 08:57:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:57:44,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:44,270 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-03 08:57:44,270 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:44,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-03 08:57:44,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:44,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:44,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:48,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:48,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:48,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:48,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-03 08:57:48,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:48,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:48,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:48,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:57:48,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:57:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:57:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:57:48,620 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-03 08:57:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:48,888 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-03 08:57:48,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:57:48,889 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-03 08:57:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:48,889 INFO L225 Difference]: With dead ends: 112 [2018-10-03 08:57:48,889 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 08:57:48,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:57:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 08:57:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-03 08:57:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 08:57:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-03 08:57:48,893 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-03 08:57:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:48,893 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-03 08:57:48,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:57:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-03 08:57:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-03 08:57:48,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:48,894 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-03 08:57:48,894 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:48,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:48,894 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-03 08:57:48,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:48,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:48,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:48,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:48,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:53,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:53,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:53,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:53,269 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:53,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:53,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:53,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:53,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-03 08:57:53,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:57:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:57:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:57:53,326 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-03 08:57:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:53,571 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:57:53,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:57:53,571 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-03 08:57:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:53,572 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:57:53,572 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:57:53,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:57:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:57:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:57:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:57:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:57:53,575 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-03 08:57:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:53,575 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:57:53,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:57:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:57:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:57:53,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:53,576 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-03 08:57:53,576 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:53,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:53,576 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-03 08:57:53,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:53,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:53,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:53,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:53,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:57,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:57,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:57,935 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:58,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-03 08:57:58,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:58,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:58,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:58,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-03 08:57:58,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:57:58,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:57:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:57:58,089 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-03 08:57:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:58,296 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-03 08:57:58,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-03 08:57:58,296 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-03 08:57:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:58,297 INFO L225 Difference]: With dead ends: 114 [2018-10-03 08:57:58,297 INFO L226 Difference]: Without dead ends: 112 [2018-10-03 08:57:58,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:57:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-03 08:57:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-03 08:57:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 08:57:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-03 08:57:58,301 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-03 08:57:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:58,301 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-03 08:57:58,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:57:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-03 08:57:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-03 08:57:58,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:58,301 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-03 08:57:58,302 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:58,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:58,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-10-03 08:57:58,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:58,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:58,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:58,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:02,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:02,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:02,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:03,007 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:58:03,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:03,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:03,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:03,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-03 08:58:03,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-03 08:58:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-03 08:58:03,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:58:03,054 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-03 08:58:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:03,372 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-03 08:58:03,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-03 08:58:03,372 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-03 08:58:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:03,373 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:58:03,373 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:58:03,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:58:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:58:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:58:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:58:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-03 08:58:03,377 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-03 08:58:03,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:03,377 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-03 08:58:03,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-03 08:58:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-03 08:58:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:58:03,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:03,378 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-03 08:58:03,379 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:03,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-10-03 08:58:03,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:03,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:03,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:03,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:03,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:07,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:07,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:07,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:07,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:07,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:07,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-03 08:58:07,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-03 08:58:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-03 08:58:07,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:58:07,939 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-03 08:58:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:08,188 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-03 08:58:08,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-03 08:58:08,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-03 08:58:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:08,189 INFO L225 Difference]: With dead ends: 116 [2018-10-03 08:58:08,189 INFO L226 Difference]: Without dead ends: 114 [2018-10-03 08:58:08,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:58:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-03 08:58:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-03 08:58:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-03 08:58:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-03 08:58:08,193 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-03 08:58:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:08,193 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-03 08:58:08,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-03 08:58:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-03 08:58:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-03 08:58:08,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:08,194 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-03 08:58:08,194 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:08,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:08,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-10-03 08:58:08,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:08,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:08,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:08,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:08,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:12,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:12,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:12,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:12,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:12,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:12,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:12,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:12,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-03 08:58:12,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-03 08:58:12,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-03 08:58:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-03 08:58:12,869 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-10-03 08:58:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:13,206 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-03 08:58:13,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-03 08:58:13,206 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-10-03 08:58:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:13,207 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:58:13,207 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:58:13,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-03 08:58:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:58:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:58:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:58:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-03 08:58:13,211 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-03 08:58:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:13,211 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-03 08:58:13,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-03 08:58:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-03 08:58:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:58:13,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:13,212 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-03 08:58:13,212 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:13,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-10-03 08:58:13,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:13,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:13,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:13,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:13,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:58:16,932 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:58:16,940 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:58:16,940 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:58:16 BoogieIcfgContainer [2018-10-03 08:58:16,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:58:16,941 INFO L168 Benchmark]: Toolchain (without parser) took 233162.87 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.5 GB in the beginning and 955.8 MB in the end (delta: 500.4 MB). Peak memory consumption was 347.3 MB. Max. memory is 7.1 GB. [2018-10-03 08:58:16,942 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:58:16,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:58:16,943 INFO L168 Benchmark]: Boogie Preprocessor took 23.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:58:16,943 INFO L168 Benchmark]: RCFGBuilder took 236.49 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. [2018-10-03 08:58:16,944 INFO L168 Benchmark]: TraceAbstraction took 232854.38 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.4 GB in the beginning and 955.8 MB in the end (delta: 479.3 MB). Peak memory consumption was 326.2 MB. Max. memory is 7.1 GB. [2018-10-03 08:58:16,945 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.54 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 23.63 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 236.49 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 232854.38 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.4 GB in the beginning and 955.8 MB in the end (delta: 479.3 MB). Peak memory consumption was 326.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 98 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 232.7s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 21.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 335 SDtfs, 2 SDslu, 4710 SDs, 0 SdLazy, 11037 SolverSat, 163 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 192.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 196.2s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 25410 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 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/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-58-16-957.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-58-16-957.csv Completed graceful shutdown