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/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:24:00,436 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:24:00,439 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:24:00,455 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:24:00,455 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:24:00,457 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:24:00,458 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:24:00,460 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:24:00,462 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:24:00,463 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:24:00,464 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:24:00,498 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 [2018-09-30 20:24:00,523 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:24:00,524 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:24:00,525 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:24:00,525 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:24:00,525 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:24:00,526 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:24:00,526 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:24:00,527 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:24:00,527 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:24:00,527 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:24:00,527 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:24:00,527 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:24:00,527 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:24:00,528 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:24:00,528 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:24:00,528 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:24:00,528 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:24:00,529 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:24:00,530 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:24:00,530 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:24:00,530 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:24:00,531 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:24:00,531 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:24:00,531 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:24:00,531 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:24:00,531 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:24:00,532 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:24:00,532 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:24:00,532 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:24:00,532 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:24:00,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:24:00,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:24:00,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:24:00,620 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:24:00,620 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:24:00,621 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-09-30 20:24:00,621 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-09-30 20:24:00,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:24:00,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:24:00,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:24:00,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:24:00,677 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:24:00,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,718 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:24:00,718 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:24:00,718 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:24:00,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:24:00,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:24:00,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:24:00,722 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:24:00,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... [2018-09-30 20:24:00,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:24:00,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:24:00,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:24:00,746 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:24:00,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:24:00,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:24:00,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:24:00,972 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:24:00,973 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:24:00 BoogieIcfgContainer [2018-09-30 20:24:00,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:24:00,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:24:00,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:24:00,977 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:24:00,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:24:00" (1/2) ... [2018-09-30 20:24:00,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3bb658 and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:24:00, skipping insertion in model container [2018-09-30 20:24:00,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:24:00" (2/2) ... [2018-09-30 20:24:00,981 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-09-30 20:24:00,990 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:24:00,998 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:24:01,048 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:24:01,048 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:24:01,049 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:24:01,049 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:24:01,049 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:24:01,049 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:24:01,050 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:24:01,050 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:24:01,050 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:24:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:24:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:24:01,080 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:01,081 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:24:01,083 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:01,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 20:24:01,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:01,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:01,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:01,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:01,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:01,242 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:24:01,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:24:01,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:24:01,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:24:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:01,259 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:24:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:01,336 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:24:01,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:24:01,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:24:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:01,353 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:24:01,353 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:24:01,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:24:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:24:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:24:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:24:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:24:01,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 20:24:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:01,442 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:24:01,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:24:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:24:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:24:01,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:01,446 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:24:01,446 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:01,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 20:24:01,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:01,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:01,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:01,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:01,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:01,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:01,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:01,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:01,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:01,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:01,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 20:24:01,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:24:01,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:24:01,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:01,641 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 20:24:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:01,685 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:24:01,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:24:01,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 20:24:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:01,687 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:24:01,687 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:24:01,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:24:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:24:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:24:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:24:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:24:01,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 20:24:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:01,692 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:24:01,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:24:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:24:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:24:01,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:01,693 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 20:24:01,693 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:01,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 20:24:01,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:01,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:01,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:01,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:01,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:01,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:01,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:01,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:01,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:01,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:01,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:01,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:01,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 20:24:01,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:24:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:24:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:01,985 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 20:24:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:02,084 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:24:02,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:24:02,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 20:24:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:02,086 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:24:02,086 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:24:02,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:24:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:24:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:24:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:24:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:24:02,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 20:24:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:02,091 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:24:02,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:24:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:24:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:24:02,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:02,092 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 20:24:02,092 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:02,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 20:24:02,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:02,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:02,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:02,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:02,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:02,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:02,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:02,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:02,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:24:02,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:02,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:02,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:02,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 20:24:02,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:24:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:24:02,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:24:02,608 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 20:24:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:02,653 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:24:02,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:24:02,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 20:24:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:02,655 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:24:02,656 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:24:02,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:24:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:24:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:24:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:24:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:24:02,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 20:24:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:02,661 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:24:02,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:24:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:24:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:24:02,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:02,662 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 20:24:02,663 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:02,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 20:24:02,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:02,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:02,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:02,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:02,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:02,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:02,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:02,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:02,857 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:02,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:02,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:03,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:03,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 20:24:03,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:24:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:24:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:24:03,017 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 20:24:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:03,141 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:24:03,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:24:03,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 20:24:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:03,142 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:24:03,142 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:24:03,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:24:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:24:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:24:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:24:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:24:03,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 20:24:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:03,147 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:24:03,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:24:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:24:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:24:03,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:03,149 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 20:24:03,149 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:03,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 20:24:03,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:03,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:03,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:03,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:03,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:03,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:03,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:03,564 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:03,598 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:24:03,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:03,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:03,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:03,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 20:24:03,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:24:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:24:03,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:24:03,743 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 20:24:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:03,831 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:24:03,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:24:03,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:24:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:03,834 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:24:03,835 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:24:03,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:24:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:24:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:24:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:24:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:24:03,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 20:24:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:03,840 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:24:03,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:24:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:24:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:24:03,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:03,841 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 20:24:03,841 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:03,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:03,842 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 20:24:03,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:03,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:03,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:03,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:03,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:03,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:03,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:03,986 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:03,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:24:03,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:03,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:04,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:04,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 20:24:04,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:24:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:24:04,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:24:04,173 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 20:24:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:04,233 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:24:04,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:24:04,234 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 20:24:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:04,235 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:24:04,236 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:24:04,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:24:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:24:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:24:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:24:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:24:04,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 20:24:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:04,242 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:24:04,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:24:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:24:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:24:04,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:04,243 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 20:24:04,243 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:04,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:04,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 20:24:04,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:04,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:04,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:04,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:04,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:04,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:04,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:04,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:04,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:04,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:04,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 20:24:04,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:24:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:24:04,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:24:04,808 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 20:24:04,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:04,881 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:24:04,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:24:04,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 20:24:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:04,882 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:24:04,883 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:24:04,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:24:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:24:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:24:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:24:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:24:04,888 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 20:24:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:04,888 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:24:04,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:24:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:24:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:24:04,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:04,890 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 20:24:04,890 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:04,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 20:24:04,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:04,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:04,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:04,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:04,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:05,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:05,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:05,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:05,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:05,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:05,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:05,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:05,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 20:24:05,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:24:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:24:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:24:05,276 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 20:24:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:05,354 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:24:05,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:24:05,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 20:24:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:05,356 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:24:05,357 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:24:05,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:24:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:24:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:24:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:24:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:24:05,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 20:24:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:05,362 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:24:05,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:24:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:24:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:24:05,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:05,363 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 20:24:05,363 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:05,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 20:24:05,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:05,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:05,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:05,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:05,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:05,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:05,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:05,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:05,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:24:05,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:05,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:05,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:05,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 20:24:05,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:24:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:24:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:24:05,822 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 20:24:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:06,082 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:24:06,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:24:06,083 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 20:24:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:06,084 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:24:06,084 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:24:06,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:24:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:24:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:24:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:24:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:24:06,094 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 20:24:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:06,095 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:24:06,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:24:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:24:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:24:06,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:06,097 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 20:24:06,098 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:06,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 20:24:06,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:06,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:06,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:06,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:06,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:06,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:06,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:06,350 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:06,368 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:06,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:06,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:06,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:06,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 20:24:06,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:24:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:24:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:24:06,607 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 20:24:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:06,671 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:24:06,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:24:06,671 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 20:24:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:06,673 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:24:06,673 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:24:06,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:24:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:24:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:24:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:24:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:24:06,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 20:24:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:06,679 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:24:06,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:24:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:24:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:24:06,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:06,680 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 20:24:06,680 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:06,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 20:24:06,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:06,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:06,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:06,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:06,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:06,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:06,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:06,863 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:06,877 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:24:06,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:06,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:07,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:07,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 20:24:07,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:24:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:24:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:24:07,435 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 20:24:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:07,549 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:24:07,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:24:07,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 20:24:07,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:07,551 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:24:07,551 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:24:07,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:24:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:24:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:24:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:24:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:24:07,556 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 20:24:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:07,556 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:24:07,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:24:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:24:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:24:07,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:07,557 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 20:24:07,557 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:07,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 20:24:07,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:07,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:07,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:07,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:07,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:07,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:07,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:07,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:07,948 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:24:07,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:07,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:08,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:08,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 20:24:08,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:24:08,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:24:08,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:24:08,279 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 20:24:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:08,366 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:24:08,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:24:08,367 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 20:24:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:08,367 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:24:08,368 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:24:08,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:24:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:24:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:24:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:24:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:24:08,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 20:24:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:08,374 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:24:08,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:24:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:24:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:24:08,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:08,375 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 20:24:08,375 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:08,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:08,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 20:24:08,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:08,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:08,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:08,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:08,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:08,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:08,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:08,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:08,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:09,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:09,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 20:24:09,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:24:09,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:24:09,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:24:09,025 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 20:24:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:09,108 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:24:09,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:24:09,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 20:24:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:09,109 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:24:09,109 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:24:09,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:24:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:24:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:24:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:24:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:24:09,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 20:24:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:09,114 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:24:09,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:24:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:24:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:24:09,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:09,115 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 20:24:09,116 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:09,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 20:24:09,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:09,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:09,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:09,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:09,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:09,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:09,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:09,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:09,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:09,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:09,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:09,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:09,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 20:24:09,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:24:09,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:24:09,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:24:09,695 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 20:24:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:09,847 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:24:09,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:24:09,847 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 20:24:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:09,848 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:24:09,848 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:24:09,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:24:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:24:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:24:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:24:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:24:09,855 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 20:24:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:09,855 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:24:09,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:24:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:24:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:24:09,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:09,856 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 20:24:09,856 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:09,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 20:24:09,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:09,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:09,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:10,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:10,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:10,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:10,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:24:10,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:10,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:10,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:10,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 20:24:10,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:24:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:24:10,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:24:10,722 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 20:24:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:10,836 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:24:10,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:24:10,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 20:24:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:10,838 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:24:10,838 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:24:10,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:24:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:24:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:24:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:24:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:24:10,844 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 20:24:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:10,844 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:24:10,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:24:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:24:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:24:10,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:10,845 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 20:24:10,845 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:10,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 20:24:10,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:10,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:10,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:10,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:10,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:11,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:11,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:11,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:11,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:11,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:11,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:11,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:11,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 20:24:11,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:24:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:24:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:24:11,505 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 20:24:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:11,582 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:24:11,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:24:11,583 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 20:24:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:11,584 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:24:11,584 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:24:11,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:24:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:24:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:24:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:24:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:24:11,589 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 20:24:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:11,589 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:24:11,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:24:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:24:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:24:11,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:11,590 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 20:24:11,591 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:11,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 20:24:11,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:11,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:11,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:11,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:11,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:11,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:11,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:11,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:11,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:24:11,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:11,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:12,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:12,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 20:24:12,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:24:12,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:24:12,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:24:12,445 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 20:24:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:12,672 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:24:12,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:24:12,672 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 20:24:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:12,673 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:24:12,674 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:24:12,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:24:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:24:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:24:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:24:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:24:12,680 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 20:24:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:12,680 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:24:12,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:24:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:24:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:24:12,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:12,682 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 20:24:12,682 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:12,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 20:24:12,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:12,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:12,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:12,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:12,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:12,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:12,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:12,991 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:13,012 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:24:13,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:13,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:13,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:13,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 20:24:13,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:24:13,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:24:13,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:24:13,782 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 20:24:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:13,870 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:24:13,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:24:13,870 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 20:24:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:13,871 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:24:13,871 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:24:13,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:24:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:24:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:24:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:24:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:24:13,876 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 20:24:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:13,876 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:24:13,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:24:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:24:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:24:13,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:13,877 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 20:24:13,877 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:13,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 20:24:13,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:13,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:13,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:13,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:13,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:14,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:14,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:14,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:14,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:15,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:15,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 20:24:15,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:24:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:24:15,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:24:15,012 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 20:24:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:15,145 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:24:15,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:24:15,146 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 20:24:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:15,147 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:24:15,147 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:24:15,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:24:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:24:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:24:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:24:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:24:15,152 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 20:24:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:15,153 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:24:15,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:24:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:24:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:24:15,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:15,154 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 20:24:15,154 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:15,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 20:24:15,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:15,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:15,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:15,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:15,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:15,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:15,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:16,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:16,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:16,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:16,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:16,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 20:24:16,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:24:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:24:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:24:16,358 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 20:24:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:16,472 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:24:16,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:24:16,472 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 20:24:16,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:16,473 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:24:16,473 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:24:16,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:24:16,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:24:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:24:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:24:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:24:16,480 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 20:24:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:16,481 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:24:16,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:24:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:24:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:24:16,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:16,482 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 20:24:16,482 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:16,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:16,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 20:24:16,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:16,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:16,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:16,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:17,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:17,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:17,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:17,540 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:24:17,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:17,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:18,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:18,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 20:24:18,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:24:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:24:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:24:18,065 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 20:24:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:18,211 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:24:18,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:24:18,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 20:24:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:18,214 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:24:18,214 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:24:18,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:24:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:24:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:24:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:24:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:24:18,219 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 20:24:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:18,219 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:24:18,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:24:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:24:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:24:18,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:18,220 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 20:24:18,220 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:18,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 20:24:18,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:18,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:18,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:18,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:18,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:19,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:19,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:19,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:19,167 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:19,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:19,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:19,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:19,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 20:24:19,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:24:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:24:19,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:24:19,706 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 20:24:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:19,809 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:24:19,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:24:19,810 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 20:24:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:19,811 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:24:19,811 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:24:19,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:24:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:24:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:24:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:24:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:24:19,817 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 20:24:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:19,818 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:24:19,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:24:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:24:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:24:19,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:19,819 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 20:24:19,819 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:19,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 20:24:19,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:19,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:19,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:19,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:19,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:20,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:20,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:20,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:20,707 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:24:20,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:20,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:21,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:21,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 20:24:21,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:24:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:24:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:24:21,219 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 20:24:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:21,354 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:24:21,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:24:21,354 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 20:24:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:21,355 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:24:21,355 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:24:21,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:24:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:24:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:24:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:24:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:24:21,361 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 20:24:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:21,361 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:24:21,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:24:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:24:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:24:21,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:21,362 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 20:24:21,362 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:21,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 20:24:21,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:21,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:21,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:21,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:21,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:21,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:21,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:21,877 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:21,901 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:24:21,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:21,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:22,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:22,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 20:24:22,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:24:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:24:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:24:22,393 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 20:24:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:22,568 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:24:22,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:24:22,568 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 20:24:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:22,569 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:24:22,569 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:24:22,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:24:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:24:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:24:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:24:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:24:22,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 20:24:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:22,575 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:24:22,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:24:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:24:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:24:22,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:22,576 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 20:24:22,576 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:22,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:22,576 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 20:24:22,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:22,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:22,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:22,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:22,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:23,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:23,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:23,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:23,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:23,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:23,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 20:24:23,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:24:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:24:23,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:24:23,604 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 20:24:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:23,735 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:24:23,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:24:23,736 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 20:24:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:23,737 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:24:23,737 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:24:23,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:24:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:24:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:24:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:24:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:24:23,746 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 20:24:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:23,746 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:24:23,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:24:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:24:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:24:23,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:23,747 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 20:24:23,747 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:23,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:23,748 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 20:24:23,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:23,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:23,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:23,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:23,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:24,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:24,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:24,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:24,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:24,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:24,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:24,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:24,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 20:24:24,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:24:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:24:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:24:24,705 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 20:24:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:24,847 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:24:24,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:24:24,848 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 20:24:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:24,849 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:24:24,849 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:24:24,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:24:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:24:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:24:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:24:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:24:24,855 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 20:24:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:24,856 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:24:24,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:24:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:24:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:24:24,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:24,857 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 20:24:24,857 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:24,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 20:24:24,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:24,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:24,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:25,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:25,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:25,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:25,464 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:24:25,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:25,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:25,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:25,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 20:24:25,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:24:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:24:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:24:25,974 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 20:24:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:26,086 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:24:26,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:24:26,086 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 20:24:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:26,087 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:24:26,087 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:24:26,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:24:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:24:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:24:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:24:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:24:26,092 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 20:24:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:26,092 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:24:26,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:24:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:24:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:24:26,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:26,093 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 20:24:26,093 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:26,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 20:24:26,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:26,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:26,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:26,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:26,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:26,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:26,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:26,612 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:26,647 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:26,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:26,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:28,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:28,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 20:24:28,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:24:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:24:28,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:24:28,181 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 20:24:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:28,419 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:24:28,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:24:28,420 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 20:24:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:28,421 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:24:28,421 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:24:28,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:24:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:24:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:24:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:24:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:24:28,426 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 20:24:28,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:28,426 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:24:28,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:24:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:24:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:24:28,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:28,427 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 20:24:28,427 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:28,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:28,428 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 20:24:28,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:28,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:28,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:28,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:28,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:28,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:28,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:28,936 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:28,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:24:28,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:28,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:29,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:29,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 20:24:29,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:24:29,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:24:29,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:24:29,559 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 20:24:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:29,705 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:24:29,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:24:29,705 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 20:24:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:29,706 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:24:29,706 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:24:29,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:24:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:24:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:24:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:24:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:24:29,710 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 20:24:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:29,710 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:24:29,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:24:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:24:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:24:29,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:29,711 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 20:24:29,711 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:29,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 20:24:29,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:29,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:29,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:29,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:29,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:30,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:30,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:30,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:30,267 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:24:30,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:30,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:31,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:31,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 20:24:31,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:24:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:24:31,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:24:31,005 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 20:24:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:31,129 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:24:31,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:24:31,129 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 20:24:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:31,130 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:24:31,130 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:24:31,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:24:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:24:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:24:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:24:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:24:31,135 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 20:24:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:31,136 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:24:31,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:24:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:24:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:24:31,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:31,136 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 20:24:31,137 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:31,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 20:24:31,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:31,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:31,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:31,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:31,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:31,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:31,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:31,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:31,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:32,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:32,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 20:24:32,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:24:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:24:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:24:32,474 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 20:24:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:32,658 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:24:32,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:24:32,658 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 20:24:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:32,659 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:24:32,659 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:24:32,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:24:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:24:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:24:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:24:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:24:32,665 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 20:24:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:32,665 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:24:32,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:24:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:24:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:24:32,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:32,666 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 20:24:32,666 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:32,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 20:24:32,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:32,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:32,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:32,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:32,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:33,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:33,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:33,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:33,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:33,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:33,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:34,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:34,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 20:24:34,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:24:34,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:24:34,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:24:34,330 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 20:24:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:34,504 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:24:34,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:24:34,504 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 20:24:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:34,505 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:24:34,506 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:24:34,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:24:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:24:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:24:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:24:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:24:34,511 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 20:24:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:34,511 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:24:34,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:24:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:24:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:24:34,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:34,512 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 20:24:34,512 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:34,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 20:24:34,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:34,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:34,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:34,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:34,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:35,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:35,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:35,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:35,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:24:35,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:35,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:35,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:35,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 20:24:35,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:24:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:24:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:24:35,976 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 20:24:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:36,173 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:24:36,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:24:36,174 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 20:24:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:36,175 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:24:36,175 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:24:36,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:24:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:24:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:24:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:24:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:24:36,179 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 20:24:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:36,179 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:24:36,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:24:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:24:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:24:36,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:36,179 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 20:24:36,180 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:36,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 20:24:36,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:36,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:36,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:36,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:36,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:36,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:36,774 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 [2018-09-30 20:24:36,782 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:36,800 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:36,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:36,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:37,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:37,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 20:24:37,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:24:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:24:37,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:24:37,593 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 20:24:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:37,771 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:24:37,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:24:37,772 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 20:24:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:37,773 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:24:37,773 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:24:37,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:24:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:24:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:24:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:24:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:24:37,777 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 20:24:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:37,778 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:24:37,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:24:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:24:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:24:37,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:37,779 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 20:24:37,779 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:37,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 20:24:37,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:37,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:37,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:37,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:37,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:38,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:38,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:38,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:38,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:24:38,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:38,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:39,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:39,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 20:24:39,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:24:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:24:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:24:39,586 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 20:24:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:39,923 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:24:39,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:24:39,923 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 20:24:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:39,924 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:24:39,924 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:24:39,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:24:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:24:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:24:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:24:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:24:39,928 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 20:24:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:39,928 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:24:39,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:24:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:24:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:24:39,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:39,929 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 20:24:39,929 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:39,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 20:24:39,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:39,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:39,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:39,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:40,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:40,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:40,795 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:40,834 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:24:40,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:40,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:41,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:41,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 20:24:41,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:24:41,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:24:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:24:41,678 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 20:24:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:41,852 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:24:41,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:24:41,852 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 20:24:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:41,853 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:24:41,853 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:24:41,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:24:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:24:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:24:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:24:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:24:41,857 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 20:24:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:41,858 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:24:41,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:24:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:24:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:24:41,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:41,858 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 20:24:41,859 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:41,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 20:24:41,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:41,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:41,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:41,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:41,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:43,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:43,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:43,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:43,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:44,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:44,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 20:24:44,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:24:44,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:24:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:24:44,410 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 20:24:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:44,569 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:24:44,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:24:44,569 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 20:24:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:44,570 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:24:44,570 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:24:44,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:24:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:24:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:24:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:24:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:24:44,575 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 20:24:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:44,575 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:24:44,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:24:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:24:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:24:44,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:44,576 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 20:24:44,576 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:44,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 20:24:44,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:44,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:44,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:44,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:45,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:45,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:45,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:45,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:45,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:45,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:46,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 20:24:46,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:24:46,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:24:46,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:24:46,399 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 20:24:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:46,569 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:24:46,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:24:46,569 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 20:24:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:46,570 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:24:46,570 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:24:46,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:24:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:24:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:24:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:24:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:24:46,575 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 20:24:46,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:46,575 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:24:46,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:24:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:24:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:24:46,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:46,576 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 20:24:46,576 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:46,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:46,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 20:24:46,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:46,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:46,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:46,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:47,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:47,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:47,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:47,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:24:47,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:47,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:48,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 20:24:48,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:24:48,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:24:48,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:24:48,859 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 20:24:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:49,038 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:24:49,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:24:49,039 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 20:24:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:49,040 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:24:49,040 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:24:49,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:24:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:24:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:24:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:24:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:24:49,044 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 20:24:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:49,045 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:24:49,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:24:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:24:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:24:49,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:49,045 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 20:24:49,046 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:49,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 20:24:49,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:49,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:49,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:49,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:49,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:49,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:49,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:49,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:49,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:49,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:50,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:50,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 20:24:50,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:24:50,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:24:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:24:50,991 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 20:24:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:51,157 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:24:51,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:24:51,158 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 20:24:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:51,159 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:24:51,159 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:24:51,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:24:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:24:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:24:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:24:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:24:51,164 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 20:24:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:51,164 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:24:51,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:24:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:24:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:24:51,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:51,165 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 20:24:51,166 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:51,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:51,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 20:24:51,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:51,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:51,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:51,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:52,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:52,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:52,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:52,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:24:52,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:52,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:53,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:53,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 20:24:53,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:24:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:24:53,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:24:53,249 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 20:24:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:53,567 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:24:53,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:24:53,567 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 20:24:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:53,568 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:24:53,568 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:24:53,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:24:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:24:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:24:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:24:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:24:53,573 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 20:24:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:53,573 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:24:53,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:24:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:24:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:24:53,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:53,574 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 20:24:53,575 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:53,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 20:24:53,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:53,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:53,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:53,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:54,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:54,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:54,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:54,581 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:24:54,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:54,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:55,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:55,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 20:24:55,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:24:55,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:24:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:24:55,836 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 20:24:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:56,048 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:24:56,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:24:56,049 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 20:24:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:56,050 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:24:56,050 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:24:56,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:24:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:24:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:24:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:24:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:24:56,054 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 20:24:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:56,055 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:24:56,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:24:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:24:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:24:56,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:56,055 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 20:24:56,056 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:56,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 20:24:56,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:56,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:56,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:56,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:57,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:57,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:57,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:57,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:59,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:59,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 20:24:59,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:24:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:24:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:24:59,082 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 20:24:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:59,261 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:24:59,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:24:59,261 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 20:24:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:59,262 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:24:59,263 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:24:59,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:24:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:24:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:24:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:24:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:24:59,267 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 20:24:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:59,267 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:24:59,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:24:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:24:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:24:59,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:59,268 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 20:24:59,268 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:59,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 20:24:59,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:59,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:59,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:59,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:00,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:00,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:00,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:00,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:00,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:00,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:01,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 20:25:01,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:25:01,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:25:01,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:25:01,718 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 20:25:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:01,903 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:25:01,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:25:01,903 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 20:25:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:01,905 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:25:01,905 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:25:01,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:25:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:25:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:25:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:25:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:25:01,909 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 20:25:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:01,911 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:25:01,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:25:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:25:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:25:01,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:01,913 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 20:25:01,913 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:01,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 20:25:01,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:01,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:01,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:01,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:02,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:02,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:03,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:03,052 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:25:03,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:03,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:04,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:04,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 20:25:04,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:25:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:25:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:25:04,705 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 20:25:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:04,909 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:25:04,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:25:04,910 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 20:25:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:04,911 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:25:04,911 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:25:04,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:25:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:25:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:25:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:25:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:25:04,916 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 20:25:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:04,917 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:25:04,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:25:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:25:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:25:04,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:04,918 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 20:25:04,918 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:04,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 20:25:04,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:04,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:04,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:04,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:06,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:06,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:06,101 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:06,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:06,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:06,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:07,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:07,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 20:25:07,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:25:07,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:25:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:25:07,447 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 20:25:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:07,634 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:25:07,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:25:07,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 20:25:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:07,636 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:25:07,636 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:25:07,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:25:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:25:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:25:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:25:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:25:07,641 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 20:25:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:07,641 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:25:07,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:25:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:25:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:25:07,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:07,642 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 20:25:07,642 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:07,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 20:25:07,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:07,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:07,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:07,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:09,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:09,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:09,055 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:09,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:25:09,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:09,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:10,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:10,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 20:25:10,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:25:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:25:10,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:25:10,636 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 20:25:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:10,869 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:25:10,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:25:10,869 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 20:25:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:10,871 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:25:10,871 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:25:10,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:25:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:25:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:25:10,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:25:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:25:10,877 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 20:25:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:10,877 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:25:10,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:25:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:25:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:25:10,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:10,877 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 20:25:10,878 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:10,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 20:25:10,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:10,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:10,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:10,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:12,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:12,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:12,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:12,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:25:12,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:12,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:13,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:13,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 20:25:13,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:25:13,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:25:13,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:25:13,617 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 20:25:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:13,926 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:25:13,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:25:13,926 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 20:25:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:13,927 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:25:13,927 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:25:13,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:25:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:25:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:25:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:25:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:25:13,932 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 20:25:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:13,932 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:25:13,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:25:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:25:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:25:13,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:13,933 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 20:25:13,933 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:13,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 20:25:13,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:13,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:13,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:13,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:13,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:15,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:15,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:15,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:15,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:17,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:17,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 20:25:17,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:25:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:25:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:25:17,893 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 20:25:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:18,167 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:25:18,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:25:18,168 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 20:25:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:18,169 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:25:18,169 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:25:18,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:25:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:25:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:25:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:25:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:25:18,176 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 20:25:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:18,177 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:25:18,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:25:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:25:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:25:18,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:18,178 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 20:25:18,178 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:18,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:18,179 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 20:25:18,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:18,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:18,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:18,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:19,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:19,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:19,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:19,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:19,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:19,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:21,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:21,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 20:25:21,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:25:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:25:21,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:25:21,135 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 20:25:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:23,286 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:25:23,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:25:23,286 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 20:25:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:23,287 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:25:23,287 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:25:23,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:25:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:25:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:25:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:25:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:25:23,295 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 20:25:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:23,295 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:25:23,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:25:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:25:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:25:23,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:23,296 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 20:25:23,296 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:23,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 20:25:23,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:23,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:23,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:23,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:24,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:24,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:24,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:24,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:25:24,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:24,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:26,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:26,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 20:25:26,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:25:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:25:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:25:26,483 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 20:25:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:26,694 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:25:26,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:25:26,694 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 20:25:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:26,695 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:25:26,696 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:25:26,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:25:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:25:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:25:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:25:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:25:26,702 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 20:25:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:26,702 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:25:26,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:25:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:25:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:25:26,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:26,703 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 20:25:26,703 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:26,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:26,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 20:25:26,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:26,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:26,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:26,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:28,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:28,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:28,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:28,224 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:28,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:28,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:30,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:30,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 20:25:30,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:25:30,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:25:30,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:25:30,876 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 20:25:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:31,100 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:25:31,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:25:31,101 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 20:25:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:31,102 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:25:31,102 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:25:31,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:25:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:25:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:25:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:25:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:25:31,106 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 20:25:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:31,106 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:25:31,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:25:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:25:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:25:31,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:31,107 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 20:25:31,107 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:31,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 20:25:31,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:31,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:31,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:31,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:32,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:32,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:32,431 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:32,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 20:25:32,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:32,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:34,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:34,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 20:25:34,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:25:34,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:25:34,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:25:34,304 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 20:25:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:34,584 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:25:34,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:25:34,585 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 20:25:34,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:34,585 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:25:34,585 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:25:34,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:25:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:25:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:25:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:25:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:25:34,590 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 20:25:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:34,591 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:25:34,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:25:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:25:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:25:34,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:34,591 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 20:25:34,591 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:34,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:34,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 20:25:34,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:34,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:34,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:34,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:36,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:36,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:36,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:25:36,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:25:36,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:36,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:38,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:38,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 20:25:38,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:25:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:25:38,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 20:25:38,322 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 20:25:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:38,605 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:25:38,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:25:38,605 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 20:25:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:38,607 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:25:38,607 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:25:38,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 20:25:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:25:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:25:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:25:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:25:38,614 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 20:25:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:38,615 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:25:38,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:25:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:25:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:25:38,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:38,616 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 20:25:38,616 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:38,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 20:25:38,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:38,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:38,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:38,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:40,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:40,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:40,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:40,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:42,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:42,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 20:25:42,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:25:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:25:42,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:25:42,142 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 20:25:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:42,660 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:25:42,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:25:42,661 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 20:25:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:42,662 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:25:42,662 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:25:42,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:25:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:25:42,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:25:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:25:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 20:25:42,668 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 20:25:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:42,668 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 20:25:42,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:25:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 20:25:42,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:25:42,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:42,669 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 20:25:42,670 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:42,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 20:25:42,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:42,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:42,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:42,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:46,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:46,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:46,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:25:46,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:25:46,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:46,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:48,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:48,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 20:25:48,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:25:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:25:48,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 20:25:48,062 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 20:25:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:48,395 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:25:48,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:25:48,395 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 20:25:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:48,396 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:25:48,396 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:25:48,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 20:25:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:25:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:25:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:25:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 20:25:48,401 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 20:25:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:48,401 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 20:25:48,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:25:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 20:25:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:25:48,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:48,402 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 20:25:48,402 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:48,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 20:25:48,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:48,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:48,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:48,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:50,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:50,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:50,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:25:50,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 20:25:50,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:50,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:52,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:52,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 20:25:52,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:25:52,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:25:52,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 20:25:52,324 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 20:25:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:52,580 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:25:52,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:25:52,581 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 20:25:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:52,582 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:25:52,582 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:25:52,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 20:25:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:25:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:25:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:25:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 20:25:52,586 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 20:25:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:52,587 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 20:25:52,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:25:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 20:25:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:25:52,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:52,587 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 20:25:52,588 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:52,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 20:25:52,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:52,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:52,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:52,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:54,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:54,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:54,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:25:54,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:25:54,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:54,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:57,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:57,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 20:25:57,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:25:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:25:57,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 20:25:57,131 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 20:25:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:57,427 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:25:57,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:25:57,428 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 20:25:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:57,429 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:25:57,429 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:25:57,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 20:25:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:25:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:25:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:25:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 20:25:57,435 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 20:25:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:57,435 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 20:25:57,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:25:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 20:25:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:25:57,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:57,436 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 20:25:57,436 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:57,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 20:25:57,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:57,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:57,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:57,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:59,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:59,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:59,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:25:59,129 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 20:25:59,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:25:59,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:01,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:01,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 20:26:01,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:26:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:26:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 20:26:01,484 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 20:26:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:01,751 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:26:01,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:26:01,752 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 20:26:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:01,753 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:26:01,753 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:26:01,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 20:26:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:26:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:26:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:26:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 20:26:01,758 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 20:26:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:01,759 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 20:26:01,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:26:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 20:26:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:26:01,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:01,760 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 20:26:01,760 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:01,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:01,760 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 20:26:01,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:01,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:01,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:01,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:03,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:03,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:03,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:03,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:26:03,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:03,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:06,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:06,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 20:26:06,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:26:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:26:06,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 20:26:06,036 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 20:26:06,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:06,287 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:26:06,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:26:06,287 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 20:26:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:06,288 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:26:06,288 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:26:06,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 20:26:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:26:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:26:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:26:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 20:26:06,292 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 20:26:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:06,293 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 20:26:06,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:26:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 20:26:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:26:06,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:06,293 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 20:26:06,294 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:06,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:06,294 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 20:26:06,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:06,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:06,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:06,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:08,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:08,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:08,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:09,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:11,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:11,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 20:26:11,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:26:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:26:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 20:26:11,342 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 20:26:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:11,645 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:26:11,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:26:11,645 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 20:26:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:11,646 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:26:11,646 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:26:11,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 20:26:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:26:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:26:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:26:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 20:26:11,653 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 20:26:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:11,653 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 20:26:11,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:26:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 20:26:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:26:11,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:11,654 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 20:26:11,654 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:11,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:11,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 20:26:11,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:11,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:11,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:11,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:11,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:14,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:14,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:14,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:14,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:14,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:14,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:16,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:16,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 20:26:16,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:26:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:26:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 20:26:16,741 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 20:26:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:16,992 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:26:16,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:26:16,993 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 20:26:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:16,994 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:26:16,994 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:26:16,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 20:26:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:26:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:26:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:26:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 20:26:16,999 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 20:26:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:17,000 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 20:26:17,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:26:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 20:26:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 20:26:17,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:17,001 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 20:26:17,001 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:17,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 20:26:17,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:17,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:17,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:17,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:17,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:18,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:18,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:18,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:18,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 20:26:18,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:18,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:21,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:21,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 20:26:21,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:26:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:26:21,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:26:21,441 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 20:26:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:21,744 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:26:21,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:26:21,745 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 20:26:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:21,746 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:26:21,746 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 20:26:21,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:26:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 20:26:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 20:26:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 20:26:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 20:26:21,752 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 20:26:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:21,752 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 20:26:21,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:26:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 20:26:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:26:21,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:21,753 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 20:26:21,753 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:21,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 20:26:21,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:21,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:21,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:21,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:23,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:23,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:23,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:23,656 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:23,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:23,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:26,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:26,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 20:26:26,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:26:26,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:26:26,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 20:26:26,202 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 20:26:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:26,460 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:26:26,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:26:26,461 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 20:26:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:26,462 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:26:26,462 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:26:26,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 20:26:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:26:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 20:26:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 20:26:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 20:26:26,467 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 20:26:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:26,467 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 20:26:26,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:26:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 20:26:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:26:26,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:26,468 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 20:26:26,468 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:26,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 20:26:26,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:26,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:26,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:26,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:28,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:28,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:28,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:26:28,590 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 20:26:28,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:28,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:32,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:32,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 20:26:32,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:26:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:26:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 20:26:32,136 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 20:26:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:32,487 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:26:32,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:26:32,488 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 20:26:32,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:32,489 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:26:32,489 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:26:32,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 20:26:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:26:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:26:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:26:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 20:26:32,494 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 20:26:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:32,495 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 20:26:32,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:26:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 20:26:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:26:32,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:32,496 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 20:26:32,496 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:32,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 20:26:32,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:32,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:32,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:32,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:32,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:34,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:34,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:34,403 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:26:34,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:26:34,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:34,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:37,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:37,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 20:26:37,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:26:37,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:26:37,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 20:26:37,221 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 20:26:37,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:37,542 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:26:37,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:26:37,543 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 20:26:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:37,543 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:26:37,544 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:26:37,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 20:26:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:26:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 20:26:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 20:26:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 20:26:37,548 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 20:26:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:37,548 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 20:26:37,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:26:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 20:26:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:26:37,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:37,549 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 20:26:37,549 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:37,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 20:26:37,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:37,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:37,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:37,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:39,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:39,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:39,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:39,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:42,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:42,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 20:26:42,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:26:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:26:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 20:26:42,373 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 20:26:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:42,688 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:26:42,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:26:42,689 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 20:26:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:42,690 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:26:42,690 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:26:42,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 20:26:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:26:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:26:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:26:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 20:26:42,696 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 20:26:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:42,696 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 20:26:42,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:26:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 20:26:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 20:26:42,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:42,698 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 20:26:42,698 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:42,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:42,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 20:26:42,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:42,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:42,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:42,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:26:42,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:44,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:44,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:44,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:26:44,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:26:44,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:44,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:47,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:47,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 20:26:47,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:26:47,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:26:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 20:26:47,591 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 20:26:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:47,902 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:26:47,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:26:47,903 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 20:26:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:47,904 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:26:47,904 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:26:47,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 20:26:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:26:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:26:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:26:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 20:26:47,909 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 20:26:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:47,910 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 20:26:47,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:26:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 20:26:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 20:26:47,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:47,911 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 20:26:47,911 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:47,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 20:26:47,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:47,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:47,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:47,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:47,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:49,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:49,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:49,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:26:50,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:26:50,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:50,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:52,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:52,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 20:26:52,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:26:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:26:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 20:26:52,974 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 20:26:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:53,347 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:26:53,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:26:53,348 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 20:26:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:53,349 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:26:53,349 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:26:53,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 20:26:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:26:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 20:26:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 20:26:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 20:26:53,355 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 20:26:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:53,355 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 20:26:53,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:26:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 20:26:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:26:53,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:53,356 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 20:26:53,356 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:53,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 20:26:53,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:53,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:53,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:53,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:53,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:26:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:55,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:26:55,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:26:55,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:26:55,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:26:55,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:26:55,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:26:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:26:58,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:26:58,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 20:26:58,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:26:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:26:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 20:26:58,859 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 20:26:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:26:59,241 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:26:59,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:26:59,242 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 20:26:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:26:59,243 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:26:59,243 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:26:59,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 20:26:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:26:59,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:26:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:26:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 20:26:59,247 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 20:26:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:26:59,247 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 20:26:59,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:26:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 20:26:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 20:26:59,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:26:59,248 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 20:26:59,248 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:26:59,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:26:59,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 20:26:59,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:26:59,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:26:59,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:59,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:26:59,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:26:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:01,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:01,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:01,688 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:01,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 20:27:01,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:01,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:05,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:05,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 20:27:05,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:27:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:27:05,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 20:27:05,030 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 20:27:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:05,389 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:27:05,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:27:05,390 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 20:27:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:05,391 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:27:05,391 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:27:05,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 20:27:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:27:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:27:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:27:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 20:27:05,397 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 20:27:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:05,398 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 20:27:05,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:27:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 20:27:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:27:05,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:05,399 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 20:27:05,399 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:05,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 20:27:05,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:05,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:05,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:07,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:07,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:08,006 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:08,105 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:27:08,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:08,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:10,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:10,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 20:27:10,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:27:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:27:10,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 20:27:10,997 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 20:27:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:11,689 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:27:11,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:27:11,690 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 20:27:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:11,691 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:27:11,691 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 20:27:11,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 20:27:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 20:27:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 20:27:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:27:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 20:27:11,696 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 20:27:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:11,697 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 20:27:11,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:27:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 20:27:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:27:11,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:11,698 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 20:27:11,698 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:11,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 20:27:11,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:11,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:11,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:11,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:11,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:14,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:14,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:14,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:14,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:17,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:17,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 20:27:17,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:27:17,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:27:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 20:27:17,401 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 20:27:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:17,759 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:27:17,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:27:17,759 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 20:27:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:17,761 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:27:17,761 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:27:17,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 20:27:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:27:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 20:27:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 20:27:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 20:27:17,767 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 20:27:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:17,767 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 20:27:17,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:27:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 20:27:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 20:27:17,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:17,768 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 20:27:17,768 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:17,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 20:27:17,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:17,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:17,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:17,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:17,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:20,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:20,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:20,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:27:20,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:27:20,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:20,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:23,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:23,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 20:27:23,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:27:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:27:23,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 20:27:23,613 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 20:27:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:24,031 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:27:24,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:27:24,031 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 20:27:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:24,032 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:27:24,032 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:27:24,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 20:27:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:27:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 20:27:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 20:27:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 20:27:24,037 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 20:27:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:24,037 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 20:27:24,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 20:27:24,037 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 20:27:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 20:27:24,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:24,038 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 20:27:24,038 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:24,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 20:27:24,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:24,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:24,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:24,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:24,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:26,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:26,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:26,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:27:26,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 20:27:26,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:26,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:29,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:29,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 20:27:29,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 20:27:29,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 20:27:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 20:27:29,990 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 20:27:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:30,396 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:27:30,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:27:30,396 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 20:27:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:30,397 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:27:30,397 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 20:27:30,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 20:27:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 20:27:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 20:27:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 20:27:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 20:27:30,403 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 20:27:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:30,403 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 20:27:30,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 20:27:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 20:27:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:27:30,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:30,404 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 20:27:30,404 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:30,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 20:27:30,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:30,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:30,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:30,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:30,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:33,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:33,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:33,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:27:33,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:27:33,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:33,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:36,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:36,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 20:27:36,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 20:27:36,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 20:27:36,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 20:27:36,401 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 20:27:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:36,749 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:27:36,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:27:36,749 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 20:27:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:36,750 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:27:36,750 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:27:36,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 20:27:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:27:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 20:27:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:27:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 20:27:36,755 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 20:27:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:36,755 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 20:27:36,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 20:27:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 20:27:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 20:27:36,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:36,756 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 20:27:36,756 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:36,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 20:27:36,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:36,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:36,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:39,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:39,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:39,598 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:27:39,703 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 20:27:39,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:39,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:43,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:43,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 20:27:43,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 20:27:43,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 20:27:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 20:27:43,120 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 20:27:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:43,496 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:27:43,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:27:43,496 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 20:27:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:43,497 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:27:43,497 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:27:43,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 20:27:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:27:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 20:27:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:27:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 20:27:43,504 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 20:27:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:43,504 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 20:27:43,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 20:27:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 20:27:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 20:27:43,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:43,505 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 20:27:43,505 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:43,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 20:27:43,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:43,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:43,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:43,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:43,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:46,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:46,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:46,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:27:46,378 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:27:46,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:27:46,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:50,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:50,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 20:27:50,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 20:27:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 20:27:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 20:27:50,018 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 20:27:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:50,414 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:27:50,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:27:50,414 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 20:27:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:50,416 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:27:50,416 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:27:50,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 20:27:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:27:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 20:27:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 20:27:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 20:27:50,422 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 20:27:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:50,423 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 20:27:50,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 20:27:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 20:27:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:27:50,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:50,424 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 20:27:50,424 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:50,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:50,424 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 20:27:50,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:50,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:50,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:50,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:27:50,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:53,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:27:53,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:27:53,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:27:53,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:27:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:27:56,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:27:56,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 20:27:56,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 20:27:56,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 20:27:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 20:27:56,930 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 20:27:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:27:57,320 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:27:57,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:27:57,320 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 20:27:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:27:57,321 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:27:57,322 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:27:57,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 20:27:57,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:27:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 20:27:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:27:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 20:27:57,328 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 20:27:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:27:57,328 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 20:27:57,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 20:27:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 20:27:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:27:57,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:27:57,330 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 20:27:57,330 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:27:57,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:27:57,330 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 20:27:57,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:27:57,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:27:57,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:57,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:27:57,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:27:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:27:57,453 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:27:57,458 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:27:57,458 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:27:57 BoogieIcfgContainer [2018-09-30 20:27:57,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:27:57,459 INFO L168 Benchmark]: Toolchain (without parser) took 236786.54 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 337.4 MB). Peak memory consumption was 213.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:27:57,462 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:27:57,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:27:57,463 INFO L168 Benchmark]: Boogie Preprocessor took 24.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:27:57,463 INFO L168 Benchmark]: RCFGBuilder took 227.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:27:57,464 INFO L168 Benchmark]: TraceAbstraction took 236484.26 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 316.3 MB). Peak memory consumption was 192.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:27:57,474 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.60 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 24.03 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 227.34 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 236484.26 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 316.3 MB). Peak memory consumption was 192.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 3 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.4s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 19.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 203.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, 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, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 208.1s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-27-57-493.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-27-57-493.csv Completed graceful shutdown