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/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:20:18,643 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:20:18,645 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:20:18,662 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:20:18,663 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:20:18,665 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:20:18,668 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:20:18,670 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:20:18,672 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:20:18,673 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:20:18,674 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:20:18,699 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 [2018-09-26 21:20:18,724 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:20:18,725 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:20:18,728 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:20:18,728 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:20:18,729 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:20:18,729 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:20:18,729 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:20:18,730 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:20:18,730 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:20:18,730 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:20:18,730 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:20:18,730 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:20:18,730 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:20:18,731 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:20:18,731 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:20:18,731 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:20:18,731 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:20:18,733 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:20:18,733 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:20:18,733 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:20:18,733 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:20:18,733 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:20:18,734 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:20:18,734 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:20:18,734 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:20:18,734 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:20:18,735 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:20:18,735 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:20:18,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:20:18,736 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:20:18,801 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:20:18,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:20:18,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:20:18,825 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:20:18,826 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:20:18,827 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl [2018-09-26 21:20:18,827 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_nondet.i_3.bpl' [2018-09-26 21:20:18,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:20:18,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:20:18,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:18,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:20:18,886 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:20:18,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:18,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:20:18,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:20:18,930 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:20:18,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/1) ... [2018-09-26 21:20:18,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:20:18,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:20:18,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:20:18,956 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:20:18,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (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 [2018-09-26 21:20:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:20:19,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:20:19,270 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:20:19,271 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:20:19 BoogieIcfgContainer [2018-09-26 21:20:19,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:20:19,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:20:19,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:20:19,276 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:20:19,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:18" (1/2) ... [2018-09-26 21:20:19,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4492bb and model type count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:20:19, skipping insertion in model container [2018-09-26 21:20:19,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:20:19" (2/2) ... [2018-09-26 21:20:19,280 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bpl [2018-09-26 21:20:19,290 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:20:19,298 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:20:19,353 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:20:19,354 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:20:19,354 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:20:19,354 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:20:19,354 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:20:19,354 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:20:19,355 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:20:19,355 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:20:19,355 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:20:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:20:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:20:19,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:19,379 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:20:19,380 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:19,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:20:19,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:19,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:19,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:19,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:19,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:19,584 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:20:19,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:20:19,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:20:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:20:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:20:19,605 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:20:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:19,650 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:20:19,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:20:19,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:20:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:19,662 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:20:19,663 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:20:19,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:20:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:20:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:20:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:20:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:20:19,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 21:20:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:19,705 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:20:19,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:20:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:20:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:20:19,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:19,706 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 21:20:19,707 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:19,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 21:20:19,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:19,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:19,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:19,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:19,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:19,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:19,859 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 [2018-09-26 21:20:19,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:19,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:19,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:19,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:20:19,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:20:19,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:20:19,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:20:19,974 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 21:20:20,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:20,048 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:20:20,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:20:20,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:20:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:20,052 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:20:20,052 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:20:20,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:20:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:20:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:20:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:20:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:20:20,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 21:20:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:20,060 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:20:20,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:20:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:20:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:20:20,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:20,061 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 21:20:20,061 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:20,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:20,062 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 21:20:20,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:20,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:20,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:20,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:20,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:20,173 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 [2018-09-26 21:20:20,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:20,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:20,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:20,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:20,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:20,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:20:20,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:20:20,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:20:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:20:20,255 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 21:20:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:20,339 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:20:20,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:20:20,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:20:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:20,340 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:20:20,340 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:20:20,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:20:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:20:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:20:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:20:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:20:20,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 21:20:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:20,345 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:20:20,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:20:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:20:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:20:20,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:20,347 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 21:20:20,347 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:20,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 21:20:20,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:20,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:20,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:20,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:20,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:20,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:20,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:20,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:20:20,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:20,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:20,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:20,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:20:20,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:20:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:20:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:20:20,574 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 21:20:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:20,609 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:20:20,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:20:20,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:20:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:20,610 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:20:20,610 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:20:20,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:20:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:20:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:20:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:20:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:20:20,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 21:20:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:20,619 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:20:20,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:20:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:20:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:20:20,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:20,620 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 21:20:20,620 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:20,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-26 21:20:20,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:20,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:20,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:20,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:20,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:20,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:20,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:21,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:21,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:21,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:21,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:21,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:20:21,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:20:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:20:21,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:20:21,063 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-26 21:20:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:21,096 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:20:21,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:20:21,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:20:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:21,098 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:20:21,098 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:20:21,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:20:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:20:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:20:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:20:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:20:21,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 21:20:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:21,103 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:20:21,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:20:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:20:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:20:21,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:21,104 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-26 21:20:21,105 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:21,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-26 21:20:21,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:21,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:21,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:21,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:21,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:21,352 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 [2018-09-26 21:20:21,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:21,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:20:21,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:21,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:21,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:21,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:20:21,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:20:21,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:20:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:20:21,422 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-26 21:20:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:21,455 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:20:21,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:20:21,457 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:20:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:21,458 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:20:21,458 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:20:21,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:20:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:20:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:20:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:20:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:20:21,464 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 21:20:21,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:21,464 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:20:21,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:20:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:20:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:20:21,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:21,465 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-26 21:20:21,466 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:21,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-26 21:20:21,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:21,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:21,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:21,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:21,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:21,657 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 [2018-09-26 21:20:21,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:21,704 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:20:21,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:21,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:21,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:21,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:20:21,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:20:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:20:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:20:21,741 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-26 21:20:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:21,781 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:20:21,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:20:21,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:20:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:21,783 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:20:21,783 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:20:21,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:20:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:20:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:20:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:20:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:20:21,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 21:20:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:21,789 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:20:21,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:20:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:20:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:20:21,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:21,790 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-26 21:20:21,790 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:21,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-26 21:20:21,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:21,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:21,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:21,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:22,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:22,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:22,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:22,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:22,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:22,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:20:22,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:20:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:20:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:20:22,560 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-26 21:20:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:22,599 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:20:22,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:20:22,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:20:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:22,602 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:20:22,602 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:20:22,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:20:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:20:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:20:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:20:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:20:22,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 21:20:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:22,608 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:20:22,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:20:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:20:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:20:22,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:22,609 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-26 21:20:22,609 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:22,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:22,610 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-26 21:20:22,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:22,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:22,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:22,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:22,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:22,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:22,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:22,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:22,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:22,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:22,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:22,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:22,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:20:22,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:20:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:20:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:20:22,903 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-26 21:20:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:22,945 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:20:22,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:20:22,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:20:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:22,946 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:20:22,947 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:20:22,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:20:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:20:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:20:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:20:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:20:22,952 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 21:20:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:22,952 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:20:22,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:20:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:20:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:20:22,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:22,954 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-26 21:20:22,954 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:22,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-26 21:20:22,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:22,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:22,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:22,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:22,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:23,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:23,156 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 [2018-09-26 21:20:23,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:23,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:20:23,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:23,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:23,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:23,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:20:23,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:20:23,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:20:23,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:23,238 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-26 21:20:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:23,307 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:20:23,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:20:23,308 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:20:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:23,309 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:20:23,309 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:20:23,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:20:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:20:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:20:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:20:23,315 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-26 21:20:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:23,316 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:20:23,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:20:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:20:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:20:23,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:23,317 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-26 21:20:23,317 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:23,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-26 21:20:23,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:23,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:23,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:23,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:23,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:23,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:23,572 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 [2018-09-26 21:20:23,579 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:23,611 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:23,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:23,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:23,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:23,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:20:23,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:20:23,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:20:23,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:20:23,657 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-26 21:20:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:23,733 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:20:23,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:20:23,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-26 21:20:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:23,734 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:20:23,734 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:20:23,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:20:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:20:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:20:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:20:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:20:23,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-26 21:20:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:23,740 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:20:23,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:20:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:20:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:20:23,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:23,741 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-26 21:20:23,741 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:23,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-26 21:20:23,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:23,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:23,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:23,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:23,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:24,183 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 [2018-09-26 21:20:24,190 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:24,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:20:24,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:24,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:24,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:20:24,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:20:24,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:20:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:24,273 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-26 21:20:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:24,479 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:20:24,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:20:24,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:20:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:24,481 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:20:24,481 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:20:24,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:20:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:20:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:20:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:20:24,492 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-26 21:20:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:24,493 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:20:24,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:20:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:20:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:20:24,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:24,494 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-26 21:20:24,494 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:24,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-26 21:20:24,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:24,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:24,818 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 [2018-09-26 21:20:24,826 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:24,865 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:20:24,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:24,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:24,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:24,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:20:24,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:20:24,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:20:24,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:20:24,905 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-26 21:20:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:24,956 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:20:24,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:20:24,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-26 21:20:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:24,958 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:20:24,958 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:20:24,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:20:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:20:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:20:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:20:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:20:24,964 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-26 21:20:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:24,964 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:20:24,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:20:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:20:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:20:24,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:24,966 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-26 21:20:24,966 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:24,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-26 21:20:24,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:24,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:24,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:24,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:25,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:25,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:25,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:25,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:25,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:25,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:20:25,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:20:25,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:20:25,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:20:25,320 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-26 21:20:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:25,413 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:20:25,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:20:25,418 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:20:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:25,418 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:20:25,419 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:20:25,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:20:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:20:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:20:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:20:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:20:25,426 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-26 21:20:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:25,427 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:20:25,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:20:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:20:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:20:25,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:25,428 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-26 21:20:25,428 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:25,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:25,428 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-26 21:20:25,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:25,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:25,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:25,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:25,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:25,694 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 [2018-09-26 21:20:25,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:25,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:25,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:25,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:25,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:25,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:20:25,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:20:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:20:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:20:25,783 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-26 21:20:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:25,829 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:20:25,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:20:25,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-26 21:20:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:25,830 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:20:25,830 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:20:25,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:20:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:20:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:20:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:20:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:20:25,835 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-26 21:20:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:25,836 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:20:25,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:20:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:20:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:20:25,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:25,837 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-26 21:20:25,837 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:25,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:25,838 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-26 21:20:25,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:25,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:25,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:25,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:26,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:26,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:26,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:26,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:20:26,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:26,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:26,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:26,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:20:26,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:20:26,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:20:26,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:20:26,369 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-26 21:20:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:26,452 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:20:26,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:20:26,454 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:20:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:26,454 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:20:26,455 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:20:26,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:20:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:20:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:20:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:20:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:20:26,460 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-26 21:20:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:26,460 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:20:26,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:20:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:20:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:20:26,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:26,462 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-26 21:20:26,462 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:26,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:26,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-26 21:20:26,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:26,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:26,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:26,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:26,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:27,353 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 [2018-09-26 21:20:27,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:27,407 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:27,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:27,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:27,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:20:27,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:20:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:20:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:20:27,463 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-26 21:20:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:27,591 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:20:27,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:20:27,592 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-26 21:20:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:27,592 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:20:27,593 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:20:27,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:20:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:20:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:20:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:20:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:20:27,599 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-26 21:20:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:27,600 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:20:27,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:20:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:20:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:20:27,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:27,601 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-26 21:20:27,601 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:27,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-26 21:20:27,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:27,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:27,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:27,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:28,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:28,482 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 [2018-09-26 21:20:28,491 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:28,546 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:20:28,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:28,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:28,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:28,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:20:28,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:20:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:20:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:20:28,592 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-26 21:20:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:28,673 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:20:28,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:20:28,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:20:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:28,674 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:20:28,674 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:20:28,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:20:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:20:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:20:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:20:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:20:28,679 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-26 21:20:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:28,679 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:20:28,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:20:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:20:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:20:28,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:28,680 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-26 21:20:28,681 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:28,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:28,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-26 21:20:28,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:28,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:28,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:28,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:29,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:29,011 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:29,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:20:29,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:29,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:29,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:20:29,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:20:29,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:20:29,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:29,137 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-26 21:20:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:29,452 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:20:29,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:20:29,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-26 21:20:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:29,453 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:20:29,453 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:20:29,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:20:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:20:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:20:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:20:29,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-26 21:20:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:29,460 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:20:29,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:20:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:20:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:20:29,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:29,461 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-26 21:20:29,461 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:29,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-26 21:20:29,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:29,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:29,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:29,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:30,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:30,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:30,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:30,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:20:30,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:20:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:20:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:30,738 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-26 21:20:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:30,826 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:20:30,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:20:30,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:20:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:30,828 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:20:30,828 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:20:30,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:20:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:20:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:20:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:20:30,834 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-26 21:20:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:30,834 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:20:30,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:20:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:20:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:20:30,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:30,835 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-26 21:20:30,835 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:30,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-26 21:20:30,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:30,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:30,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:30,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:30,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:31,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:31,144 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 [2018-09-26 21:20:31,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:31,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:31,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:31,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:31,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:31,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:20:31,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:20:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:20:31,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:31,230 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-26 21:20:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:31,317 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:20:31,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:20:31,317 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-26 21:20:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:31,318 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:20:31,318 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:20:31,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:20:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:20:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:20:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:20:31,324 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-26 21:20:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:31,324 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:20:31,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:20:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:20:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:20:31,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:31,325 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-26 21:20:31,326 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:31,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-26 21:20:31,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:31,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:31,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:31,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:31,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:31,769 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 [2018-09-26 21:20:31,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:31,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:20:31,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:31,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:31,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:31,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:20:31,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:20:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:20:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:31,870 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-26 21:20:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:32,135 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:20:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:20:32,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:20:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:32,138 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:20:32,138 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:20:32,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:20:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:20:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:20:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:20:32,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-26 21:20:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:32,143 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:20:32,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:20:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:20:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:20:32,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:32,144 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-26 21:20:32,144 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:32,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-26 21:20:32,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:32,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:32,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:32,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:33,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:33,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:33,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:33,079 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:33,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:33,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:33,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:33,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:20:33,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:20:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:20:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:20:33,122 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-26 21:20:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:33,188 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:20:33,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:20:33,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-26 21:20:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:33,190 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:20:33,190 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:20:33,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:20:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:20:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:20:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:20:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:20:33,195 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-26 21:20:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:33,195 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:20:33,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:20:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:20:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:20:33,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:33,196 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-26 21:20:33,197 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:33,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-26 21:20:33,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:33,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:33,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:33,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:33,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:33,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:33,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:33,764 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:20:33,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:33,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:33,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:33,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:20:33,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:20:33,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:20:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:20:33,804 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-26 21:20:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:33,864 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:20:33,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:20:33,865 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:20:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:33,866 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:20:33,866 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:20:33,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:20:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:20:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:20:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:20:33,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:20:33,870 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-26 21:20:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:33,870 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:20:33,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:20:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:20:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:20:33,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:33,871 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-26 21:20:33,871 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:33,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-26 21:20:33,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:33,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:33,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:33,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:34,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:34,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:34,802 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:20:34,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:34,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:34,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:20:34,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:20:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:20:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:20:34,848 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-26 21:20:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:34,947 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:20:34,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:20:34,948 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-26 21:20:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:34,948 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:20:34,948 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:20:34,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:20:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:20:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:20:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:20:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:20:34,954 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-26 21:20:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:34,954 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:20:34,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:20:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:20:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:20:34,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:34,955 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-26 21:20:34,955 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:34,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-26 21:20:34,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:34,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:34,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:34,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:35,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:35,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:35,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:35,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:36,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:36,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:20:36,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:20:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:20:36,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:20:36,002 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-26 21:20:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:36,041 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:20:36,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:20:36,041 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:20:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:36,042 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:20:36,042 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:20:36,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:20:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:20:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:20:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:20:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:20:36,046 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-26 21:20:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:36,046 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:20:36,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:20:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:20:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:20:36,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:36,047 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-26 21:20:36,047 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:36,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:36,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-26 21:20:36,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:36,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:36,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:36,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:36,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:36,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:20:36,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:36,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:36,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:36,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:37,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:20:37,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:20:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:20:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:20:37,021 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-26 21:20:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:37,088 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:20:37,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:20:37,088 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-26 21:20:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:37,089 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:20:37,089 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:20:37,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:20:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:20:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:20:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:20:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:20:37,093 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-26 21:20:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:37,093 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:20:37,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:20:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:20:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:20:37,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:37,094 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-26 21:20:37,095 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:37,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:37,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-26 21:20:37,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:37,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:37,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:37,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:37,719 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 [2018-09-26 21:20:37,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:37,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:20:37,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:37,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:37,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:20:37,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:20:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:20:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:20:37,844 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-26 21:20:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:37,920 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:20:37,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:20:37,921 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:20:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:37,922 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:20:37,922 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:20:37,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:20:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:20:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:20:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:20:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:20:37,926 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-26 21:20:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:37,926 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:20:37,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:20:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:20:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:20:37,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:37,927 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-26 21:20:37,927 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:37,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-26 21:20:37,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:37,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:37,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:37,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:38,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:38,404 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 [2018-09-26 21:20:38,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:38,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:38,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:38,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:38,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:38,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:20:38,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:20:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:20:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:20:38,507 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-26 21:20:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:38,584 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:20:38,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:20:38,584 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-26 21:20:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:38,585 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:20:38,585 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:20:38,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:20:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:20:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:20:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:20:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:20:38,590 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-26 21:20:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:38,590 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:20:38,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:20:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:20:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:20:38,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:38,591 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-26 21:20:38,591 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:38,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-26 21:20:38,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:38,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:38,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:39,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:39,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:39,053 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:39,120 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:20:39,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:39,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:39,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:39,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:20:39,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:20:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:20:39,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:20:39,164 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-26 21:20:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:39,230 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:20:39,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:20:39,230 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:20:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:39,231 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:20:39,231 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:20:39,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:20:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:20:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:20:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:20:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:20:39,236 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-26 21:20:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:39,236 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:20:39,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:20:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:20:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:20:39,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:39,237 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-26 21:20:39,237 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:39,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-26 21:20:39,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:39,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:39,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:39,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:39,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:40,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:40,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:40,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:40,447 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:20:40,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:40,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:40,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:40,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:20:40,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:20:40,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:20:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:20:40,483 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-26 21:20:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:40,593 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:20:40,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:20:40,594 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-26 21:20:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:40,595 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:20:40,595 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:20:40,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:20:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:20:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:20:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:20:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:20:40,602 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-26 21:20:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:40,602 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:20:40,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:20:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:20:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:20:40,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:40,603 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-26 21:20:40,604 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:40,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-26 21:20:40,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:40,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:40,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:40,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:40,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:41,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:41,159 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 [2018-09-26 21:20:41,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:41,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:41,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:41,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:20:41,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:20:41,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:20:41,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:20:41,257 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-26 21:20:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:41,321 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:20:41,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:20:41,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:20:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:41,323 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:20:41,323 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:20:41,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:20:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:20:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:20:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:20:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:20:41,326 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-26 21:20:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:41,327 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:20:41,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:20:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:20:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:20:41,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:41,327 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-26 21:20:41,328 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:41,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-26 21:20:41,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:41,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:41,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:41,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:41,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:42,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:42,468 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 [2018-09-26 21:20:42,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:42,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:42,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:42,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:42,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:42,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:20:42,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:20:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:20:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:20:42,579 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-26 21:20:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:42,686 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:20:42,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:20:42,686 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-26 21:20:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:42,687 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:20:42,688 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:20:42,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:20:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:20:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:20:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:20:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:20:42,693 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-26 21:20:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:42,693 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:20:42,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:20:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:20:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:20:42,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:42,694 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-26 21:20:42,694 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:42,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-26 21:20:42,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:42,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:42,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:42,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:42,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:43,525 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 [2018-09-26 21:20:43,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:43,601 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:20:43,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:43,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:43,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:20:43,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:20:43,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:20:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:20:43,635 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-26 21:20:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:43,712 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:20:43,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:20:43,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:20:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:43,714 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:20:43,714 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:20:43,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:20:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:20:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:20:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:20:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:20:43,719 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-26 21:20:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:43,719 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:20:43,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:20:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:20:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:20:43,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:43,720 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-26 21:20:43,720 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:43,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-26 21:20:43,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:43,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:43,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:43,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:43,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:44,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:44,522 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 [2018-09-26 21:20:44,530 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:44,588 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:44,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:44,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:44,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:44,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:20:44,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:20:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:20:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:20:44,625 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-26 21:20:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:44,792 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:20:44,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:20:44,792 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-26 21:20:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:44,793 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:20:44,793 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:20:44,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:20:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:20:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:20:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:20:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:20:44,797 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-26 21:20:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:44,797 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:20:44,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:20:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:20:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:20:44,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:44,798 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-26 21:20:44,798 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:44,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-26 21:20:44,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:44,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:44,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:44,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:45,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:45,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:45,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:45,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:20:45,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:45,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:45,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:45,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:20:45,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:20:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:20:45,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:20:45,591 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-26 21:20:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:45,661 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:20:45,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:20:45,662 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:20:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:45,663 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:20:45,663 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:20:45,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:20:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:20:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:20:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:20:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:20:45,666 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-26 21:20:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:45,667 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:20:45,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:20:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:20:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:20:45,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:45,667 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-26 21:20:45,667 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:45,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:45,668 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-26 21:20:45,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:45,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:45,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:45,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:45,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:46,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:46,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:46,316 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:46,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:20:46,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:46,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:46,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:46,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:20:46,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:20:46,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:20:46,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:20:46,442 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-26 21:20:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:46,507 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:20:46,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:20:46,507 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-26 21:20:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:46,508 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:20:46,509 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:20:46,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:20:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:20:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:20:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:20:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:20:46,513 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-26 21:20:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:46,513 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:20:46,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:20:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:20:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:20:46,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:46,514 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-26 21:20:46,514 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:46,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-26 21:20:46,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:46,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:46,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:46,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:47,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:47,860 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 [2018-09-26 21:20:47,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:47,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:47,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:47,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:20:47,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:20:47,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:20:47,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:20:47,975 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-26 21:20:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:48,051 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:20:48,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:20:48,052 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:20:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:48,053 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:20:48,053 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:20:48,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:20:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:20:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:20:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:20:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:20:48,058 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-26 21:20:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:48,058 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:20:48,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:20:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:20:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:20:48,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:48,059 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-26 21:20:48,059 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:48,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-26 21:20:48,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:48,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:48,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:48,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:48,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:48,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:48,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:48,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:48,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:48,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:48,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:48,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:48,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:20:48,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:20:48,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:20:48,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:20:48,975 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-26 21:20:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:49,063 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:20:49,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:20:49,063 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-26 21:20:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:49,064 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:20:49,064 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:20:49,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:20:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:20:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:20:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:20:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:20:49,068 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-26 21:20:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:49,068 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:20:49,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:20:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:20:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:20:49,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:49,069 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-26 21:20:49,069 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:49,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-26 21:20:49,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:49,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:49,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:49,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:49,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:49,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:49,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:49,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:20:49,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:49,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:50,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:50,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:20:50,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:20:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:20:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:20:50,008 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-26 21:20:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:50,485 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:20:50,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:20:50,485 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:20:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:50,486 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:20:50,486 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:20:50,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:20:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:20:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:20:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:20:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:20:50,489 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-26 21:20:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:50,490 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:20:50,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:20:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:20:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:20:50,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:50,490 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-26 21:20:50,490 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:50,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-26 21:20:50,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:50,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:50,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:50,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:51,398 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 [2018-09-26 21:20:51,405 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:51,469 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:51,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:51,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:51,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:20:51,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:20:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:20:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:20:51,510 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-26 21:20:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:51,580 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:20:51,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:20:51,580 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-26 21:20:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:51,582 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:20:51,582 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:20:51,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:20:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:20:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:20:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:20:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:20:51,586 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-26 21:20:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:51,587 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:20:51,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:20:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:20:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:20:51,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:51,588 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-26 21:20:51,588 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:51,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-26 21:20:51,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:51,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:51,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:51,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:51,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:52,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:52,826 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 [2018-09-26 21:20:52,836 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:53,031 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:20:53,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:53,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:53,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:20:53,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:20:53,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:20:53,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:20:53,082 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-26 21:20:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:53,192 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:20:53,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:20:53,193 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:20:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:53,194 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:20:53,194 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:20:53,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:20:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:20:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:20:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:20:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:20:53,198 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-26 21:20:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:53,198 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:20:53,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:20:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:20:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:20:53,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:53,199 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-26 21:20:53,199 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:53,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:53,199 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-26 21:20:53,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:53,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:53,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:53,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:54,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:54,545 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 [2018-09-26 21:20:54,555 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:54,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:20:54,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:54,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:54,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:54,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:20:54,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:20:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:20:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:20:54,692 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-26 21:20:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:54,752 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:20:54,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:20:54,752 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-26 21:20:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:54,753 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:20:54,753 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:20:54,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:20:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:20:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:20:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:20:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:20:54,757 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-26 21:20:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:54,757 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:20:54,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:20:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:20:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:20:54,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:54,758 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-26 21:20:54,758 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:54,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-26 21:20:54,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:54,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:54,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:54,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:54,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:56,278 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 [2018-09-26 21:20:56,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:56,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:56,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:20:56,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:20:56,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:20:56,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:20:56,400 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-26 21:20:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:56,523 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:20:56,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:20:56,524 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:20:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:56,525 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:20:56,525 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:20:56,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:20:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:20:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:20:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:20:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:20:56,530 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-26 21:20:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:56,530 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:20:56,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:20:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:20:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:20:56,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:56,531 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-26 21:20:56,531 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:56,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-26 21:20:56,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:56,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:56,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:57,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:57,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:57,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:57,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:57,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:57,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:57,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:57,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:20:57,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:20:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:20:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:20:57,722 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-26 21:20:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:58,024 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:20:58,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:20:58,024 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-26 21:20:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:58,025 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:20:58,025 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:20:58,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:20:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:20:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:20:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:20:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:20:58,029 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-26 21:20:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:58,029 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:20:58,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:20:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:20:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:20:58,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:58,030 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-26 21:20:58,030 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:58,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-26 21:20:58,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:58,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:58,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:58,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:58,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:59,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:20:59,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:59,291 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:20:59,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:59,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:59,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:20:59,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:20:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:20:59,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:20:59,343 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-26 21:20:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:59,421 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:20:59,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:20:59,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:20:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:59,423 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:20:59,423 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:20:59,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:20:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:20:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:20:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:20:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 21:20:59,427 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-26 21:20:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:59,427 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 21:20:59,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:20:59,427 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 21:20:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:20:59,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:59,428 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-26 21:20:59,428 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:59,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-26 21:20:59,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:59,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:59,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:59,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:00,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:00,662 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 [2018-09-26 21:21:00,669 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:00,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:00,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:00,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:00,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:00,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:21:00,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:21:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:21:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:21:00,803 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-26 21:21:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:01,721 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:21:01,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:21:01,722 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-26 21:21:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:01,722 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:21:01,723 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:21:01,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:21:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:21:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:21:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:21:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:21:01,727 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-26 21:21:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:01,727 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:21:01,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:21:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:21:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:21:01,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:01,728 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-26 21:21:01,728 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:01,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-26 21:21:01,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:01,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:01,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:01,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:01,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:03,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:03,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:03,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:03,312 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:21:03,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:03,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:03,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:03,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:21:03,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:21:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:21:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:21:03,372 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-26 21:21:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:03,528 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:21:03,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:21:03,529 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:21:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:03,530 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:21:03,530 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:21:03,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:21:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:21:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:21:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:21:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 21:21:03,533 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-26 21:21:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:03,534 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 21:21:03,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:21:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 21:21:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:21:03,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:03,535 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-26 21:21:03,535 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:03,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-26 21:21:03,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:03,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:03,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:03,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:03,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:04,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:04,638 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 [2018-09-26 21:21:04,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:04,761 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:21:04,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:04,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:04,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:04,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:21:04,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:21:04,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:21:04,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:21:04,807 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-26 21:21:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:04,948 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:21:04,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:21:04,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-26 21:21:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:04,950 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:21:04,950 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:21:04,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:21:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:21:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:21:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:21:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:21:04,955 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-26 21:21:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:04,955 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:21:04,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:21:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:21:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:21:04,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:04,956 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-26 21:21:04,957 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:04,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-26 21:21:04,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:04,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:04,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:04,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:04,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:06,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:06,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:06,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:06,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:06,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:06,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:21:06,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:21:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:21:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:21:06,303 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-26 21:21:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:06,437 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:21:06,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:21:06,437 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:21:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:06,438 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:21:06,438 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:21:06,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:21:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:21:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:21:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:21:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-26 21:21:06,442 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-26 21:21:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:06,442 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-26 21:21:06,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:21:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-26 21:21:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:21:06,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:06,443 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-26 21:21:06,443 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:06,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-26 21:21:06,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:06,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:06,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:06,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:06,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:07,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:07,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:07,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:07,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:07,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:07,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:21:07,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:21:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:21:07,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:21:07,646 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-26 21:21:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:07,836 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:21:07,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:21:07,837 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-26 21:21:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:07,839 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:21:07,839 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:21:07,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:21:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:21:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:21:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:21:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 21:21:07,843 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-26 21:21:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:07,843 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 21:21:07,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:21:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 21:21:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:21:07,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:07,844 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-26 21:21:07,845 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:07,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-26 21:21:07,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:07,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:07,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:07,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:09,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:09,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:09,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:09,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:21:09,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:09,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:09,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:09,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:21:09,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:21:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:21:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:21:09,306 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-26 21:21:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:09,503 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:21:09,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:21:09,503 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:21:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:09,504 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:21:09,504 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:21:09,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:21:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:21:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:21:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:21:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-26 21:21:09,509 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-26 21:21:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:09,509 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-26 21:21:09,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:21:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-26 21:21:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:21:09,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:09,510 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-26 21:21:09,510 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:09,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-26 21:21:09,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:09,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:09,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:09,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:10,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:10,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:10,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:11,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:11,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:11,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:11,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:11,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:21:11,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:21:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:21:11,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:21:11,130 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-26 21:21:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:11,369 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:21:11,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:21:11,369 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-26 21:21:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:11,370 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:21:11,370 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:21:11,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:21:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:21:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:21:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:21:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 21:21:11,378 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-26 21:21:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:11,378 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 21:21:11,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:21:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 21:21:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:21:11,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:11,379 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-26 21:21:11,379 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:11,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-26 21:21:11,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:11,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:11,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:11,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:12,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:12,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:12,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:12,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-26 21:21:12,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:12,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:12,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:12,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:21:12,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:21:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:21:12,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:21:12,787 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-26 21:21:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:12,921 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:21:12,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:21:12,922 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:21:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:12,923 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:21:12,923 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:21:12,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:21:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:21:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:21:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:21:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-26 21:21:12,928 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-26 21:21:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:12,928 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-26 21:21:12,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:21:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-26 21:21:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:21:12,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:12,929 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-26 21:21:12,930 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:12,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-26 21:21:12,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:12,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:12,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:12,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:14,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:14,320 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 [2018-09-26 21:21:14,328 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:14,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:21:14,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:14,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:14,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:14,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:21:14,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:21:14,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:21:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:21:14,532 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-26 21:21:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:14,834 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:21:14,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:21:14,835 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-26 21:21:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:14,836 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:21:14,836 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:21:14,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:21:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:21:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:21:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:21:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 21:21:14,841 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-26 21:21:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:14,841 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 21:21:14,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:21:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 21:21:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:21:14,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:14,842 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-26 21:21:14,842 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:14,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-26 21:21:14,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:14,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:14,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:14,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:16,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:16,171 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 [2018-09-26 21:21:16,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:16,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:16,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:16,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:21:16,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:21:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:21:16,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:21:16,337 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-26 21:21:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:17,060 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 21:21:17,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:21:17,064 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:21:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:17,065 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:21:17,065 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:21:17,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:21:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:21:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:21:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:21:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-26 21:21:17,069 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-26 21:21:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:17,069 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-26 21:21:17,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:21:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-26 21:21:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:21:17,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:17,070 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-26 21:21:17,070 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:17,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-26 21:21:17,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:17,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:17,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:17,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:18,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:18,664 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 [2018-09-26 21:21:18,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:18,761 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:18,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:18,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:18,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:18,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:21:18,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:21:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:21:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:21:18,819 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-26 21:21:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:19,627 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:21:19,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:21:19,627 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-26 21:21:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:19,628 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:21:19,628 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:21:19,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:21:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:21:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:21:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:21:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-26 21:21:19,632 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-26 21:21:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:19,632 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-26 21:21:19,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:21:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-26 21:21:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:21:19,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:19,634 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-26 21:21:19,634 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:19,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-26 21:21:19,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:19,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:19,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:19,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:21,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:21,423 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 [2018-09-26 21:21:21,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:21,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-26 21:21:21,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:21,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:21,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:21,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:21:21,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:21:21,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:21:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:21:21,636 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-26 21:21:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:21,843 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 21:21:21,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:21:21,843 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:21:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:21,844 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:21:21,844 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:21:21,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:21:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:21:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:21:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:21:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-26 21:21:21,848 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-26 21:21:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:21,848 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-26 21:21:21,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:21:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-26 21:21:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:21:21,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:21,849 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-26 21:21:21,850 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:21,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-26 21:21:21,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:21,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:21,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:21,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:23,722 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 [2018-09-26 21:21:23,731 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:23,823 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:23,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:23,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:23,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:21:23,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:21:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:21:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:21:23,874 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-26 21:21:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:24,000 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:21:24,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:21:24,001 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-26 21:21:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:24,001 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:21:24,001 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:21:24,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:21:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:21:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:21:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:21:24,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-26 21:21:24,006 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-26 21:21:24,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:24,006 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-26 21:21:24,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:21:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-26 21:21:24,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:21:24,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:24,007 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-26 21:21:24,007 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:24,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-26 21:21:24,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:24,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:24,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:24,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:24,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:25,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:25,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:25,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:25,639 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-26 21:21:25,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:25,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:25,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:25,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:21:25,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:21:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:21:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:21:25,699 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-26 21:21:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:25,920 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 21:21:25,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:21:25,921 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-26 21:21:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:25,921 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:21:25,921 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:21:25,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:21:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:21:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:21:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:21:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-26 21:21:25,925 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-26 21:21:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:25,925 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-26 21:21:25,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:21:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-26 21:21:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:21:25,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:25,925 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-26 21:21:25,926 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:25,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:25,926 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-26 21:21:25,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:25,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:25,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:25,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:25,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:27,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:27,436 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 [2018-09-26 21:21:27,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:27,584 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:21:27,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:27,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:27,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:27,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:21:27,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:21:27,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:21:27,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:21:27,651 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-26 21:21:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:27,947 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:21:27,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:21:27,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-26 21:21:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:27,948 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:21:27,948 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:21:27,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:21:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:21:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:21:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:21:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-26 21:21:27,953 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-26 21:21:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:27,953 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-26 21:21:27,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:21:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-26 21:21:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:21:27,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:27,954 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-26 21:21:27,954 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:27,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-26 21:21:27,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:27,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:27,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:27,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:27,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:29,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:29,846 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 [2018-09-26 21:21:29,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:29,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:29,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:29,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:21:29,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:21:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:21:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:21:30,000 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-26 21:21:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:30,147 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 21:21:30,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:21:30,147 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-26 21:21:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:30,148 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:21:30,148 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:21:30,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:21:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:21:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:21:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:21:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-26 21:21:30,151 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-26 21:21:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:30,151 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-26 21:21:30,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:21:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-26 21:21:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:21:30,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:30,152 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-26 21:21:30,152 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:30,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:30,152 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-26 21:21:30,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:30,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:30,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:30,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:30,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:31,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:31,986 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 [2018-09-26 21:21:31,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:32,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:32,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:32,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:32,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:32,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:21:32,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:21:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:21:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:32,155 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-26 21:21:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:32,276 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:21:32,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:21:32,276 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-26 21:21:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:32,277 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:21:32,277 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:21:32,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:21:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:21:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:21:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-26 21:21:32,282 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-26 21:21:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:32,282 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-26 21:21:32,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:21:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-26 21:21:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:21:32,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:32,283 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-26 21:21:32,283 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:32,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:32,284 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-26 21:21:32,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:32,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:32,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:32,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:32,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:34,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:34,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:34,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:34,379 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-26 21:21:34,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:34,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:34,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:34,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:21:34,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:21:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:21:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:21:34,438 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-26 21:21:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:34,618 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 21:21:34,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:21:34,618 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-26 21:21:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:34,619 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:21:34,619 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:21:34,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:21:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:21:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:21:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:21:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-26 21:21:34,624 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-26 21:21:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:34,624 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-26 21:21:34,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:21:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-26 21:21:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:21:34,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:34,625 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-26 21:21:34,625 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:34,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:34,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-26 21:21:34,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:34,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:34,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:34,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:34,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:36,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:36,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:36,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:36,366 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:36,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:36,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:36,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:36,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:21:36,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:21:36,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:21:36,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:21:36,414 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-26 21:21:36,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:36,534 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:21:36,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:21:36,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-26 21:21:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:36,535 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:21:36,536 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:21:36,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:21:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:21:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 21:21:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:21:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-26 21:21:36,539 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-26 21:21:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:36,540 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-26 21:21:36,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:21:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-26 21:21:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:21:36,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:36,540 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-26 21:21:36,541 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:36,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-26 21:21:36,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:36,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:36,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:36,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:38,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:38,207 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 [2018-09-26 21:21:38,233 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:38,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-26 21:21:38,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:38,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:38,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:38,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:21:38,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:21:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:21:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:21:38,463 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-26 21:21:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:38,642 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 21:21:38,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:21:38,642 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-26 21:21:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:38,643 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:21:38,643 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:21:38,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:21:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:21:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:21:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:21:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-26 21:21:38,647 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-26 21:21:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:38,647 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-26 21:21:38,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:21:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-26 21:21:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:21:38,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:38,648 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-26 21:21:38,649 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:38,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-26 21:21:38,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:38,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:38,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:38,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:40,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:40,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:40,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:40,683 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:21:40,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:40,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:40,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:40,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:21:40,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:21:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:21:40,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:21:40,744 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-26 21:21:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:40,869 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:21:40,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:21:40,870 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-26 21:21:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:40,871 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:21:40,871 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:21:40,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:21:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:21:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:21:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:21:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-26 21:21:40,875 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-26 21:21:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:40,875 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-26 21:21:40,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:21:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-26 21:21:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:21:40,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:40,876 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-26 21:21:40,876 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:40,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-26 21:21:40,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:40,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:40,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:40,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:40,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:42,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:42,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:42,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:42,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:42,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:42,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:21:42,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:21:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:21:42,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:21:42,889 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-26 21:21:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:43,068 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-26 21:21:43,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:21:43,069 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-26 21:21:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:43,070 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:21:43,070 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:21:43,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:21:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:21:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:21:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:21:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-26 21:21:43,074 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-26 21:21:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:43,074 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-26 21:21:43,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:21:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-26 21:21:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:21:43,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:43,075 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-26 21:21:43,075 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:43,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-26 21:21:43,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:43,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:43,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:43,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:45,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:45,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:21:45,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:45,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:45,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:45,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:45,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:45,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:21:45,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:21:45,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:21:45,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:21:45,388 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-26 21:21:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:45,510 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-26 21:21:45,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:21:45,511 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-26 21:21:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:45,512 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:21:45,512 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:21:45,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:21:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:21:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-26 21:21:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:21:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-26 21:21:45,516 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-26 21:21:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:45,516 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-26 21:21:45,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:21:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-26 21:21:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:21:45,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:45,517 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-26 21:21:45,517 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:45,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-26 21:21:45,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:45,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:45,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:45,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:45,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:47,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:47,391 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 [2018-09-26 21:21:47,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:47,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:21:47,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:47,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:47,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:47,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:21:47,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:21:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:21:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:21:47,665 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-26 21:21:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:48,070 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-26 21:21:48,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:21:48,071 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-26 21:21:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:48,071 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:21:48,071 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:21:48,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:21:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:21:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:21:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:21:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-26 21:21:48,075 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-26 21:21:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:48,075 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-26 21:21:48,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:21:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-26 21:21:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:21:48,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:48,076 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-26 21:21:48,076 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:48,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-26 21:21:48,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:48,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:48,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:48,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:48,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:50,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:50,412 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 [2018-09-26 21:21:50,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:50,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:50,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:50,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:50,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:50,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:21:50,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:21:50,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:21:50,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:21:50,602 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-26 21:21:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:50,842 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-26 21:21:50,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:21:50,842 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-26 21:21:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:50,843 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:21:50,843 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:21:50,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:21:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:21:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:21:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:21:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-26 21:21:50,847 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-26 21:21:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:50,847 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-26 21:21:50,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:21:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-26 21:21:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:21:50,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:50,848 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-26 21:21:50,849 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:50,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-26 21:21:50,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:50,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:50,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:50,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:50,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:52,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:52,782 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 [2018-09-26 21:21:52,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:52,986 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-26 21:21:52,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:52,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:53,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:53,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:21:53,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:21:53,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:21:53,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:21:53,073 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-26 21:21:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:53,246 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-26 21:21:53,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:21:53,246 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-26 21:21:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:53,247 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:21:53,247 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:21:53,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:21:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:21:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:21:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:21:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-26 21:21:53,251 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-26 21:21:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:53,252 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-26 21:21:53,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:21:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-26 21:21:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:21:53,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:53,253 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-26 21:21:53,253 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:53,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-26 21:21:53,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:53,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:53,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:53,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:53,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:55,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:55,765 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 [2018-09-26 21:21:55,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:55,993 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-26 21:21:55,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:55,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:56,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:56,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:21:56,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:21:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:21:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:21:56,053 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-26 21:21:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:56,203 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-26 21:21:56,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:21:56,203 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-26 21:21:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:56,205 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:21:56,205 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:21:56,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:21:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:21:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:21:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:21:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-26 21:21:56,210 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-26 21:21:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:56,210 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-26 21:21:56,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:21:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-26 21:21:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:21:56,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:56,211 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-26 21:21:56,212 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:56,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-26 21:21:56,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:56,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:56,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:56,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:56,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:58,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:58,280 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 [2018-09-26 21:21:58,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:58,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:58,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:58,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:21:58,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:21:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:21:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:21:58,457 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-26 21:21:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:58,655 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-26 21:21:58,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:21:58,655 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-26 21:21:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:58,656 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:21:58,656 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:21:58,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:21:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:21:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-26 21:21:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:21:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-26 21:21:58,660 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-26 21:21:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:58,660 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-26 21:21:58,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:21:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-26 21:21:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:21:58,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:58,661 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-26 21:21:58,661 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:58,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-26 21:21:58,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:58,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:58,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:58,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:00,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:00,949 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 [2018-09-26 21:22:00,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:01,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:01,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:01,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:01,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:01,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:22:01,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:22:01,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:22:01,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:22:01,144 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-26 21:22:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:01,357 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-26 21:22:01,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:22:01,357 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-26 21:22:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:01,358 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:22:01,358 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:22:01,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:22:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:22:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:22:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:22:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-26 21:22:01,361 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-26 21:22:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:01,362 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-26 21:22:01,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:22:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-26 21:22:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:22:01,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:01,362 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-26 21:22:01,363 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:01,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-26 21:22:01,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:01,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:01,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:03,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:03,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:03,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:03,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-26 21:22:03,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:03,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:03,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:03,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:22:03,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:22:03,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:22:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:22:03,798 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-26 21:22:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:04,035 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-26 21:22:04,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:22:04,035 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-26 21:22:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:04,036 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:22:04,036 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:22:04,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:22:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:22:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:22:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:22:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-26 21:22:04,040 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-26 21:22:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:04,040 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-26 21:22:04,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:22:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-26 21:22:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:22:04,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:04,041 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-26 21:22:04,041 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:04,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-26 21:22:04,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:04,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:04,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:04,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:04,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:06,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:06,569 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 [2018-09-26 21:22:06,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:06,696 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:06,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:06,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:06,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:06,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:22:06,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:22:06,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:22:06,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:22:06,748 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-26 21:22:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:06,967 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-26 21:22:06,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:22:06,967 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-26 21:22:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:06,968 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:22:06,968 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:22:06,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:22:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:22:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-26 21:22:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:22:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-26 21:22:06,972 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-26 21:22:06,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:06,972 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-26 21:22:06,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:22:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-26 21:22:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:22:06,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:06,973 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-26 21:22:06,973 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:06,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-26 21:22:06,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:06,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:06,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:06,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:06,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:09,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:09,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:09,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:09,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-26 21:22:09,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:09,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:09,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:09,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:22:09,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:22:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:22:09,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:22:09,524 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-26 21:22:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:10,110 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-26 21:22:10,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:22:10,111 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-26 21:22:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:10,112 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:22:10,112 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:22:10,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:22:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:22:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:22:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:22:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-26 21:22:10,117 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-26 21:22:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:10,117 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-26 21:22:10,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:22:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-26 21:22:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:22:10,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:10,118 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-26 21:22:10,119 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:10,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-26 21:22:10,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:10,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:10,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:10,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:10,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:12,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:12,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:22:12,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:12,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-26 21:22:12,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:12,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:12,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:12,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:22:12,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:22:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:22:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:22:12,891 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-26 21:22:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:13,035 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-26 21:22:13,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:22:13,036 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-26 21:22:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:13,037 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:22:13,037 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:22:13,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:22:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:22:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:22:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:22:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-26 21:22:13,043 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-26 21:22:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:13,043 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-26 21:22:13,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:22:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-26 21:22:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:22:13,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:13,045 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-26 21:22:13,045 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:13,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:13,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-26 21:22:13,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:13,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:13,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:13,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:13,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:15,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:15,707 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 [2018-09-26 21:22:15,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:15,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:15,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:15,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:22:15,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:22:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:22:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:22:15,911 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-26 21:22:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:16,158 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-26 21:22:16,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:22:16,158 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-26 21:22:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:16,159 INFO L225 Difference]: With dead ends: 167 [2018-09-26 21:22:16,159 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:22:16,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:22:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:22:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:22:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:22:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-26 21:22:16,162 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-26 21:22:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:16,163 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-26 21:22:16,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:22:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-26 21:22:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:22:16,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:16,164 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-26 21:22:16,164 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:16,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:16,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-26 21:22:16,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:16,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:16,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:16,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:16,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:18,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:18,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:18,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:18,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:18,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:18,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:18,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:18,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:22:18,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:22:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:22:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:22:18,849 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-26 21:22:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:19,011 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-26 21:22:19,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:22:19,012 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-26 21:22:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:19,013 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:22:19,013 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:22:19,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:22:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:22:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-26 21:22:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:22:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-26 21:22:19,017 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-26 21:22:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:19,018 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-26 21:22:19,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:22:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-26 21:22:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:22:19,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:19,018 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-26 21:22:19,019 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:19,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-26 21:22:19,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:19,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:19,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:19,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:19,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:21,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:21,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:21,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:22,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-26 21:22:22,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:22,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:22,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:22,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:22:22,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:22:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:22:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:22:22,152 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-26 21:22:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:22,343 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-26 21:22:22,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:22:22,343 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-26 21:22:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:22,344 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:22:22,344 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:22:22,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:22:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:22:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:22:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:22:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-26 21:22:22,348 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-26 21:22:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:22,349 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-26 21:22:22,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:22:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-26 21:22:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:22:22,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:22,350 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-26 21:22:22,350 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:22,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:22,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-26 21:22:22,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:22,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:22,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:22,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:25,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:25,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:25,218 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:25,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:25,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:25,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:25,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:25,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:22:25,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:22:25,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:22:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:22:25,420 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-26 21:22:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:25,730 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-26 21:22:25,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:22:25,731 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-26 21:22:25,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:25,731 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:22:25,731 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:22:25,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:22:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:22:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:22:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:22:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-26 21:22:25,735 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-26 21:22:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:25,735 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-26 21:22:25,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:22:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-26 21:22:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:22:25,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:25,736 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-26 21:22:25,736 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:25,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-26 21:22:25,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:25,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:25,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:25,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:25,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:28,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:28,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:28,368 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:28,593 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-26 21:22:28,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:28,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:28,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:28,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:22:28,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:22:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:22:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:22:28,650 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-26 21:22:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:28,935 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-26 21:22:28,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:22:28,936 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-26 21:22:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:28,936 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:22:28,937 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:22:28,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:22:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:22:28,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:22:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:22:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-26 21:22:28,941 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-26 21:22:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:28,941 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-26 21:22:28,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:22:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-26 21:22:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:22:28,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:28,942 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-26 21:22:28,943 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:28,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:28,943 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-26 21:22:28,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:28,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:28,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:28,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:28,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:31,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:31,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:31,926 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:32,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-26 21:22:32,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:32,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:32,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:32,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:22:32,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:22:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:22:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:22:32,211 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-26 21:22:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:32,659 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-26 21:22:32,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:22:32,659 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-26 21:22:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:32,660 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:22:32,660 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:22:32,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:22:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:22:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-26 21:22:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:22:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-26 21:22:32,664 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-26 21:22:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:32,665 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-26 21:22:32,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:22:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-26 21:22:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:22:32,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:32,666 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-26 21:22:32,666 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:32,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-26 21:22:32,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:32,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:32,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:32,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:32,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:35,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:35,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:35,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:35,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:35,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:35,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:22:35,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:22:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:22:35,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:22:35,826 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-26 21:22:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:36,098 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-26 21:22:36,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:22:36,099 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-26 21:22:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:36,100 INFO L225 Difference]: With dead ends: 179 [2018-09-26 21:22:36,100 INFO L226 Difference]: Without dead ends: 177 [2018-09-26 21:22:36,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:22:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-26 21:22:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-26 21:22:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:22:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-26 21:22:36,104 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-26 21:22:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:36,104 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-26 21:22:36,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:22:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-26 21:22:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:22:36,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:36,105 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-26 21:22:36,105 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:36,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:36,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-26 21:22:36,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:36,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:36,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:36,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:36,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:38,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:38,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:39,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:39,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:39,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:39,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:39,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:39,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:22:39,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:22:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:22:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:22:39,193 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-26 21:22:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:39,362 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-26 21:22:39,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:22:39,363 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-26 21:22:39,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:39,364 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:22:39,364 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:22:39,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:22:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:22:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-26 21:22:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:22:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-26 21:22:39,367 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-26 21:22:39,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:39,368 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-26 21:22:39,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:22:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-26 21:22:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:22:39,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:39,369 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-26 21:22:39,369 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:39,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:39,369 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-26 21:22:39,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:39,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:39,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:39,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:39,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:42,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:42,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:42,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:42,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-26 21:22:42,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:42,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:42,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:42,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:22:42,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:22:42,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:22:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:22:42,883 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-26 21:22:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:43,172 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-26 21:22:43,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:22:43,172 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-26 21:22:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:43,173 INFO L225 Difference]: With dead ends: 183 [2018-09-26 21:22:43,173 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:22:43,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:22:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:22:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:22:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:22:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-26 21:22:43,176 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-26 21:22:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:43,176 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-26 21:22:43,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:22:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-26 21:22:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:22:43,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:43,177 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-26 21:22:43,177 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:43,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-26 21:22:43,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:43,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:43,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:43,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:43,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:46,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:46,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:46,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:46,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:46,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:46,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:46,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:46,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:22:46,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:22:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:22:46,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:22:46,552 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-26 21:22:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:46,755 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-26 21:22:46,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:22:46,755 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-26 21:22:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:46,756 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:22:46,757 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:22:46,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:22:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:22:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-26 21:22:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:22:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-26 21:22:46,761 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-26 21:22:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:46,761 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-26 21:22:46,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:22:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-26 21:22:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:22:46,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:46,762 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-26 21:22:46,762 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:46,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-26 21:22:46,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:46,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:46,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:46,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:46,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:49,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:49,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:49,721 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:49,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-26 21:22:49,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:49,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:50,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:50,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:22:50,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:22:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:22:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:22:50,025 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-26 21:22:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:50,386 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-26 21:22:50,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:22:50,387 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-26 21:22:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:50,388 INFO L225 Difference]: With dead ends: 187 [2018-09-26 21:22:50,388 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:22:50,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:22:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:22:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:22:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:22:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-26 21:22:50,392 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-26 21:22:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:50,392 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-26 21:22:50,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:22:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-26 21:22:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:22:50,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:50,393 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-26 21:22:50,393 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:50,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-26 21:22:50,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:50,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:50,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:50,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:50,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:53,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:53,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:53,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:53,770 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-26 21:22:53,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:53,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:53,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:53,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:22:53,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:22:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:22:53,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:22:53,844 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-26 21:22:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:54,082 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-26 21:22:54,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:22:54,083 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-26 21:22:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:54,083 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:22:54,083 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:22:54,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:22:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:22:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:22:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:22:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-26 21:22:54,089 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-26 21:22:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:54,089 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-26 21:22:54,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:22:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-26 21:22:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:22:54,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:54,090 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-26 21:22:54,090 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:54,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:54,091 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-26 21:22:54,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:54,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:54,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:54,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:54,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:57,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:57,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:57,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:57,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:57,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:57,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:22:57,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:22:57,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:22:57,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:22:57,737 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-26 21:22:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:57,930 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-26 21:22:57,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:22:57,931 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-26 21:22:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:57,932 INFO L225 Difference]: With dead ends: 191 [2018-09-26 21:22:57,932 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:22:57,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:22:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:22:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-26 21:22:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:22:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-26 21:22:57,937 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-26 21:22:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-26 21:22:57,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:22:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-26 21:22:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:22:57,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:57,939 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-26 21:22:57,939 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:57,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-26 21:22:57,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:57,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:57,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:57,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:01,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:01,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:01,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:01,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:01,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:01,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:01,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:01,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:23:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:23:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:23:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:23:01,607 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-26 21:23:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:01,778 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-26 21:23:01,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:23:01,778 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-26 21:23:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:01,779 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:23:01,779 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:23:01,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:23:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:23:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:23:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:23:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-26 21:23:01,783 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-26 21:23:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:01,783 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-26 21:23:01,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:23:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-26 21:23:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-26 21:23:01,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:01,784 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-26 21:23:01,784 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:01,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-26 21:23:01,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:01,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:01,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:01,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:01,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:05,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:05,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:05,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:06,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-26 21:23:06,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:06,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:06,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:06,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:23:06,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:23:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:23:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:23:06,190 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-26 21:23:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:06,397 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-26 21:23:06,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:23:06,397 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-26 21:23:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:06,398 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:23:06,398 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:23:06,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:23:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:23:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-26 21:23:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:23:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-26 21:23:06,402 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-26 21:23:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:06,402 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-26 21:23:06,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:23:06,403 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-26 21:23:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:23:06,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:06,404 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-26 21:23:06,404 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:06,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:06,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-26 21:23:06,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:06,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:06,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:06,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:06,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:09,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:09,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:09,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:09,911 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:09,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:09,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:09,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:09,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:23:09,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:23:09,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:23:09,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:23:09,975 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-26 21:23:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:10,297 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-26 21:23:10,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:23:10,297 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-26 21:23:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:10,298 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:23:10,298 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:23:10,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:23:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:23:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-26 21:23:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:23:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-26 21:23:10,302 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-26 21:23:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:10,302 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-26 21:23:10,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:23:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-26 21:23:10,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:23:10,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:10,303 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-26 21:23:10,303 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:10,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-26 21:23:10,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:10,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:10,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:10,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:10,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:14,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:14,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:14,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:14,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-26 21:23:14,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:14,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:14,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:14,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:23:14,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:23:14,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:23:14,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:23:14,409 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-26 21:23:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:14,742 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-26 21:23:14,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:23:14,742 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-26 21:23:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:14,743 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:23:14,743 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:23:14,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:23:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:23:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:23:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:23:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-26 21:23:14,748 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-26 21:23:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:14,748 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-26 21:23:14,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:23:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-26 21:23:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:23:14,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:14,749 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-26 21:23:14,749 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:14,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:14,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-26 21:23:14,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:14,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:14,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:14,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:14,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:18,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:18,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:18,439 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:23:18,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-26 21:23:18,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:18,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:18,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:18,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:23:18,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:23:18,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:23:18,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:23:18,778 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-26 21:23:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:18,991 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-26 21:23:18,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:23:18,992 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-26 21:23:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:18,993 INFO L225 Difference]: With dead ends: 201 [2018-09-26 21:23:18,993 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:23:18,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:23:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:23:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-26 21:23:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:23:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-26 21:23:18,996 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-26 21:23:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:18,997 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-26 21:23:18,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:23:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-26 21:23:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:23:18,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:18,997 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-26 21:23:18,998 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:18,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-26 21:23:18,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:18,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:18,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:18,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:18,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:22,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:22,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:22,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:22,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:23,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:23,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:23:23,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:23:23,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:23:23,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:23:23,045 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-26 21:23:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:23,383 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-26 21:23:23,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:23:23,383 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-26 21:23:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:23,384 INFO L225 Difference]: With dead ends: 203 [2018-09-26 21:23:23,384 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:23:23,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:23:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:23:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-26 21:23:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:23:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-26 21:23:23,387 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-26 21:23:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:23,388 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-26 21:23:23,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:23:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-26 21:23:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:23:23,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:23,388 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-26 21:23:23,389 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:23,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-26 21:23:23,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:23,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:23,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:23,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:23,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:27,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:27,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:27,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:27,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:27,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:27,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:27,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:27,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:23:27,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:23:27,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:23:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:23:27,540 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-26 21:23:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:27,888 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-26 21:23:27,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:23:27,888 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-26 21:23:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:27,889 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:23:27,889 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:23:27,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:23:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:23:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:23:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:23:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-26 21:23:27,893 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-26 21:23:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:27,894 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-26 21:23:27,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:23:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-26 21:23:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:23:27,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:27,895 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-26 21:23:27,895 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:27,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:27,895 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-26 21:23:27,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:27,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:27,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:27,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:27,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:31,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:31,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:31,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:32,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-26 21:23:32,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:32,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:32,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:32,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:23:32,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:23:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:23:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:23:32,199 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-26 21:23:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:32,473 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-26 21:23:32,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:23:32,473 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-26 21:23:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:32,474 INFO L225 Difference]: With dead ends: 207 [2018-09-26 21:23:32,474 INFO L226 Difference]: Without dead ends: 205 [2018-09-26 21:23:32,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:23:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-26 21:23:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-26 21:23:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:23:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-26 21:23:32,478 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-26 21:23:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:32,478 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-26 21:23:32,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:23:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-26 21:23:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-26 21:23:32,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:32,479 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-26 21:23:32,479 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:32,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-26 21:23:32,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:32,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:32,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:32,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:32,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:36,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:36,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:36,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:36,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:36,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:36,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:36,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:36,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:23:36,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:23:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:23:36,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:23:36,703 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-26 21:23:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:36,958 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-26 21:23:36,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:23:36,958 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-26 21:23:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:36,959 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:23:36,959 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:23:36,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:23:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:23:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-26 21:23:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-26 21:23:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-26 21:23:36,964 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-26 21:23:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:36,964 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-26 21:23:36,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:23:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-26 21:23:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:23:36,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:36,966 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-26 21:23:36,966 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:36,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:36,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-26 21:23:36,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:36,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:36,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:36,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:36,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:40,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:40,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:40,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:41,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-26 21:23:41,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:41,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:41,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:41,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:23:41,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:23:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:23:41,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:23:41,328 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-26 21:23:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:41,611 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-26 21:23:41,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:23:41,611 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-26 21:23:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:41,612 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:23:41,612 INFO L226 Difference]: Without dead ends: 209 [2018-09-26 21:23:41,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:23:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-26 21:23:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-26 21:23:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-26 21:23:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-26 21:23:41,616 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-26 21:23:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:41,616 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-26 21:23:41,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:23:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-26 21:23:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-26 21:23:41,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:41,617 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-26 21:23:41,617 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:41,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-26 21:23:41,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:41,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:41,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:45,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:45,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:45,555 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:23:45,863 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-26 21:23:45,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:45,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:45,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:45,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:23:45,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:23:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:23:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:23:45,931 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-26 21:23:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:46,251 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-26 21:23:46,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:23:46,251 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-26 21:23:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:46,252 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:23:46,252 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:23:46,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:23:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:23:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:23:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:23:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-26 21:23:46,257 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-26 21:23:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:46,257 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-26 21:23:46,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:23:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-26 21:23:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-26 21:23:46,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:46,258 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-26 21:23:46,258 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:46,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-26 21:23:46,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:46,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:46,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:46,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:46,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:50,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:50,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:50,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:50,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:50,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:50,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:23:50,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:23:50,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:23:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:23:50,714 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-26 21:23:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:51,216 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-26 21:23:51,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:23:51,217 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-26 21:23:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:51,217 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:23:51,217 INFO L226 Difference]: Without dead ends: 213 [2018-09-26 21:23:51,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:23:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-26 21:23:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-26 21:23:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-26 21:23:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-26 21:23:51,222 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-26 21:23:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:51,222 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-26 21:23:51,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:23:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-26 21:23:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-26 21:23:51,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:51,224 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-26 21:23:51,224 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:51,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:51,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-26 21:23:51,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:51,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:51,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:51,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:51,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:55,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:55,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:55,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:55,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:55,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:55,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:55,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:55,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:23:55,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:23:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:23:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:23:55,760 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-26 21:23:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:56,030 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-26 21:23:56,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:23:56,030 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-26 21:23:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:56,031 INFO L225 Difference]: With dead ends: 217 [2018-09-26 21:23:56,031 INFO L226 Difference]: Without dead ends: 215 [2018-09-26 21:23:56,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:23:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-26 21:23:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-26 21:23:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-26 21:23:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-26 21:23:56,037 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-26 21:23:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:56,037 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-26 21:23:56,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:23:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-26 21:23:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-26 21:23:56,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:56,038 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-26 21:23:56,039 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:56,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-26 21:23:56,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:56,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:56,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:56,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:56,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:00,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:00,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:00,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:24:00,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-26 21:24:00,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:00,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:00,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:00,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-26 21:24:00,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:24:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:24:00,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:24:00,832 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-26 21:24:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:01,231 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-26 21:24:01,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-26 21:24:01,231 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-26 21:24:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:01,232 INFO L225 Difference]: With dead ends: 219 [2018-09-26 21:24:01,232 INFO L226 Difference]: Without dead ends: 217 [2018-09-26 21:24:01,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:24:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-26 21:24:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-26 21:24:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-26 21:24:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-26 21:24:01,237 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-26 21:24:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:01,237 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-26 21:24:01,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:24:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-26 21:24:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-26 21:24:01,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:01,238 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-26 21:24:01,239 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:01,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-26 21:24:01,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:01,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:01,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:01,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:01,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:05,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:05,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:05,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:24:05,921 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:24:05,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:05,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:05,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:05,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-26 21:24:05,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-26 21:24:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-26 21:24:05,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:24:05,991 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-26 21:24:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:06,328 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-26 21:24:06,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-26 21:24:06,328 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-26 21:24:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:06,329 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:24:06,329 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:24:06,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:24:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:24:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-26 21:24:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-26 21:24:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-26 21:24:06,333 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-26 21:24:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:06,334 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-26 21:24:06,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-26 21:24:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-26 21:24:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-26 21:24:06,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:06,335 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-26 21:24:06,335 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:06,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-26 21:24:06,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:06,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:06,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:10,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:10,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:10,787 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:24:11,120 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-26 21:24:11,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:11,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:11,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:11,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-26 21:24:11,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:24:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:24:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:24:11,193 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-26 21:24:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:11,556 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-26 21:24:11,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-26 21:24:11,556 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-26 21:24:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:11,557 INFO L225 Difference]: With dead ends: 223 [2018-09-26 21:24:11,557 INFO L226 Difference]: Without dead ends: 221 [2018-09-26 21:24:11,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:24:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-26 21:24:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-26 21:24:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-26 21:24:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-26 21:24:11,562 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-26 21:24:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:11,562 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-26 21:24:11,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:24:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-26 21:24:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-26 21:24:11,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:11,563 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-26 21:24:11,564 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:11,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-26 21:24:11,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:11,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:11,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:11,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:11,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:24:13,333 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:24:13,337 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:24:13,337 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:24:13 BoogieIcfgContainer [2018-09-26 21:24:13,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:24:13,338 INFO L168 Benchmark]: Toolchain (without parser) took 234456.35 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 386.4 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -94.2 MB). Peak memory consumption was 292.2 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:13,339 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 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. [2018-09-26 21:24:13,340 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.07 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. [2018-09-26 21:24:13,340 INFO L168 Benchmark]: Boogie Preprocessor took 25.47 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. [2018-09-26 21:24:13,340 INFO L168 Benchmark]: RCFGBuilder took 315.91 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. [2018-09-26 21:24:13,340 INFO L168 Benchmark]: TraceAbstraction took 234064.84 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 386.4 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -115.3 MB). Peak memory consumption was 271.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:13,342 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 0.25 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 44.07 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 25.47 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 315.91 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 234064.84 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 386.4 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -115.3 MB). Peak memory consumption was 271.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 221 with TraceHistMax 109, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 63 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 233.9s OverallTime, 109 OverallIterations, 109 TraceHistogramMax, 21.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 432 SDtfs, 0 SDslu, 9493 SDs, 0 SdLazy, 9601 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17871 GetRequests, 11985 SyntacticMatches, 0 SemanticMatches, 5886 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 178.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=108, 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: 0.4s AutomataMinimizationTime, 108 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 16.7s SatisfiabilityAnalysisTime, 186.0s InterpolantComputationTime, 23972 NumberOfCodeBlocks, 23972 NumberOfCodeBlocksAsserted, 3149 NumberOfCheckSat, 23757 ConstructedInterpolants, 0 QuantifiedInterpolants, 10312467 SizeOfPredicates, 320 NumberOfNonLiveVariables, 70941 ConjunctsInSsa, 6523 ConjunctsInUnsatCore, 215 InterpolantComputations, 1 PerfectInterpolantSequences, 0/839736 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/count_by_nondet.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-24-13-350.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-24-13-350.csv Completed graceful shutdown