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/simple1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:43:49,514 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:43:49,516 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:43:49,534 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:43:49,534 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:43:49,536 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:43:49,537 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:43:49,539 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:43:49,542 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:43:49,549 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:43:49,550 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:43:49,551 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:43:49,553 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:43:49,556 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:43:49,558 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:43:49,558 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:43:49,559 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:43:49,563 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:43:49,565 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:43:49,570 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:43:49,571 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:43:49,572 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:43:49,576 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:43:49,590 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:43:49,605 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:43:49,606 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:43:49,606 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:43:49,607 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:43:49,607 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:43:49,607 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:43:49,608 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:43:49,608 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:43:49,608 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:43:49,608 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:43:49,608 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:43:49,609 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:43:49,609 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:43:49,609 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:43:49,609 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:43:49,609 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:43:49,610 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:43:49,610 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:43:49,610 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:43:49,610 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:43:49,610 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:43:49,611 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:43:49,611 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:43:49,611 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:43:49,611 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:43:49,611 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:43:49,611 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:43:49,612 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:43:49,612 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:43:49,612 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:43:49,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:43:49,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:43:49,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:43:49,671 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:43:49,672 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:43:49,673 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl [2018-09-30 23:43:49,673 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl' [2018-09-30 23:43:49,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:43:49,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:43:49,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:43:49,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:43:49,727 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:43:49,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:43:49,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:43:49,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:43:49,766 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:43:49,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... [2018-09-30 23:43:49,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:43:49,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:43:49,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:43:49,787 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:43:49,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:43:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:43:49,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:43:50,093 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:43:50,094 INFO L202 PluginConnector]: Adding new model simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:43:50 BoogieIcfgContainer [2018-09-30 23:43:50,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:43:50,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:43:50,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:43:50,100 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:43:50,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:49" (1/2) ... [2018-09-30 23:43:50,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2404d452 and model type simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:43:50, skipping insertion in model container [2018-09-30 23:43:50,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:43:50" (2/2) ... [2018-09-30 23:43:50,104 INFO L112 eAbstractionObserver]: Analyzing ICFG simple1.i_3.bpl [2018-09-30 23:43:50,114 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:43:50,123 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:43:50,181 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:43:50,182 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:43:50,183 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:43:50,183 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:43:50,183 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:43:50,183 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:43:50,185 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:43:50,185 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:43:50,185 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:43:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:43:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:43:50,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:50,220 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:43:50,221 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:50,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 23:43:50,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:50,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:50,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:50,444 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:43:50,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:43:50,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:43:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:43:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:43:50,462 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:43:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:50,511 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 23:43:50,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:43:50,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 23:43:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:50,525 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:43:50,525 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:43:50,529 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 [2018-09-30 23:43:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:43:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:43:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:43:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:43:50,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:43:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:50,566 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:43:50,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:43:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:43:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:43:50,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:50,567 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 23:43:50,569 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:50,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:50,570 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 23:43:50,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:50,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:50,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:50,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:50,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:50,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:50,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:50,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:50,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:43:50,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:43:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:43:50,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:43:50,893 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 23:43:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:50,925 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:43:50,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:43:50,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:43:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:50,927 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:43:50,927 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:43:50,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:43:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:43:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:43:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:43:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:43:50,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 23:43:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:50,932 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:43:50,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:43:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:43:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:43:50,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:50,933 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 23:43:50,933 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:50,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 23:43:50,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:50,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:50,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:50,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:51,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:51,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:51,121 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:51,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:51,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:51,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:43:51,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:43:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:43:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:43:51,166 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 23:43:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:51,210 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:43:51,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:43:51,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:43:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:51,211 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:43:51,211 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:43:51,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:43:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:43:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:43:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:43:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:43:51,216 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 23:43:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:51,217 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:43:51,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:43:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:43:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:43:51,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:51,218 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 23:43:51,218 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:51,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 23:43:51,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:51,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:51,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:51,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:51,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:51,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:51,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:43:51,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:51,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:51,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:43:51,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:43:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:43:51,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:43:51,695 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 23:43:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:51,741 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:43:51,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:43:51,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 23:43:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:51,743 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:43:51,744 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:43:51,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:43:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:43:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:43:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:43:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:43:51,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 23:43:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:51,750 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:43:51,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:43:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:43:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:43:51,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:51,751 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 23:43:51,751 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:51,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:51,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 23:43:51,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:51,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:51,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:51,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:51,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:51,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:51,944 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:43:51,967 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:43:51,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:51,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:52,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:43:52,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:43:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:43:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:43:52,069 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 23:43:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:52,153 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:43:52,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:43:52,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 23:43:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:52,155 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:43:52,155 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:43:52,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:43:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:43:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:43:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:43:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:43:52,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 23:43:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:52,165 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:43:52,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:43:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:43:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:43:52,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:52,167 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 23:43:52,168 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:52,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 23:43:52,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:52,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:52,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:52,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:52,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:52,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:43:52,411 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:43:52,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:52,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:52,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:43:52,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:43:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:43:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:43:52,466 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 23:43:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:52,587 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:43:52,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:43:52,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 23:43:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:52,590 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:43:52,590 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:43:52,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:43:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:43:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:43:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:43:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:43:52,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 23:43:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:52,597 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:43:52,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:43:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:43:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:43:52,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:52,598 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 23:43:52,599 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:52,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 23:43:52,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:52,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:52,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:52,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:53,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:53,121 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:43:53,167 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:43:53,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:53,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:53,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:43:53,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:43:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:43:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:43:53,224 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 23:43:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:53,301 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:43:53,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:43:53,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 23:43:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:53,306 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:43:53,307 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:43:53,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:43:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:43:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:43:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:43:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:43:53,312 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 23:43:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:53,312 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:43:53,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:43:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:43:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:43:53,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:53,313 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 23:43:53,313 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:53,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:53,314 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 23:43:53,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:53,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:53,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:53,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:53,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:53,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:53,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:53,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:43:53,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:43:53,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:43:53,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:43:53,748 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 23:43:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:53,850 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:43:53,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:43:53,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 23:43:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:53,852 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:43:53,852 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:43:53,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:43:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:43:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:43:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:43:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:43:53,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 23:43:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:53,858 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:43:53,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:43:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:43:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:43:53,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:53,859 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 23:43:53,859 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:53,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:53,859 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 23:43:53,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:53,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:53,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:53,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:54,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:54,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:54,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:54,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:54,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:54,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:43:54,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:43:54,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:43:54,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:43:54,303 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 23:43:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:54,435 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:43:54,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:43:54,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 23:43:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:54,437 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:43:54,437 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:43:54,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:43:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:43:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:43:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:43:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:43:54,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 23:43:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:54,443 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:43:54,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:43:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:43:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:43:54,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:54,445 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 23:43:54,445 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:54,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:54,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 23:43:54,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:54,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:54,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:54,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:54,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:54,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:55,024 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:43:55,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:55,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:55,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:43:55,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:43:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:43:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:43:55,069 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 23:43:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:55,258 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:43:55,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:43:55,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 23:43:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:55,260 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:43:55,260 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:43:55,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:43:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:43:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:43:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:43:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:43:55,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 23:43:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:55,266 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:43:55,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:43:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:43:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:43:55,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:55,267 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 23:43:55,268 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:55,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 23:43:55,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:55,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:55,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:55,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:55,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:55,579 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:43:55,590 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:43:55,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:55,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:55,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:43:55,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:43:55,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:43:55,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:43:55,651 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 23:43:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:55,990 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:43:55,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:43:55,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 23:43:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:55,992 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:43:55,993 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:43:55,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:43:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:43:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:43:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:43:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:43:55,999 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 23:43:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:56,000 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:43:56,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:43:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:43:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:43:56,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:56,001 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 23:43:56,001 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:56,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 23:43:56,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:56,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:56,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:56,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:56,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:56,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:45:19,205 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:45:19,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:19,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:19,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:19,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:45:19,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:45:19,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:45:19,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:45:19,409 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 23:45:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:19,552 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:45:19,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:45:19,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 23:45:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:19,554 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:45:19,554 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:45:19,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:45:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:45:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:45:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:45:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:45:19,560 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 23:45:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:19,560 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:45:19,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:45:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:45:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:45:19,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:19,561 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 23:45:19,561 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:19,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 23:45:19,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:19,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:19,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:19,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:19,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:19,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:19,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:19,861 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:45:28,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:45:28,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:28,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:28,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:28,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:45:28,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:45:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:45:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:45:28,545 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 23:45:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:28,924 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:45:28,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:45:28,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 23:45:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:28,926 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:45:28,926 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:45:28,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:45:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:45:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:45:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:45:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:45:28,932 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 23:45:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:28,933 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:45:28,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:45:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:45:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:45:28,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:28,934 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 23:45:28,934 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:28,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 23:45:28,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:28,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:28,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:28,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:28,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:29,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:29,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:29,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:29,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:29,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:29,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:45:29,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:45:29,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:45:29,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:45:29,427 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 23:45:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:29,589 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:45:29,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:45:29,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 23:45:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:29,591 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:45:29,591 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:45:29,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:45:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:45:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:45:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:45:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:45:29,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 23:45:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:29,599 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:45:29,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:45:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:45:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:45:29,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:29,600 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 23:45:29,600 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:29,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 23:45:29,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:29,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:29,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:29,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:29,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:30,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:30,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:30,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:45:30,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:45:30,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:30,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:30,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:30,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:45:30,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:45:30,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:45:30,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:45:30,361 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 23:45:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:30,705 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:45:30,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:45:30,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 23:45:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:30,706 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:45:30,706 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:45:30,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:45:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:45:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:45:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:45:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:45:30,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 23:45:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:30,714 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:45:30,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:45:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:45:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:45:30,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:30,715 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 23:45:30,715 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:30,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 23:45:30,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:30,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:30,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:30,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:30,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:31,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:31,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:31,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:46:16,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:46:16,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:16,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:16,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:16,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:46:16,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:46:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:46:16,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:46:16,829 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 23:46:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:17,144 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:46:17,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:46:17,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 23:46:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:17,146 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:46:17,146 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:46:17,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:46:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:46:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:46:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:46:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:46:17,153 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 23:46:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:17,153 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:46:17,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:46:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:46:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:46:17,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:17,154 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 23:46:17,155 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:17,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 23:46:17,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:17,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:17,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:17,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:17,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:17,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:17,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:17,739 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:46:17,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:46:17,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:46:17,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:46:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:17,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:46:17,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:46:17,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:46:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:46:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:46:17,869 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 23:46:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:18,118 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:46:18,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:46:18,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 23:46:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:18,125 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:46:18,125 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:46:18,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:46:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:46:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:46:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:46:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:46:18,137 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 23:46:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:18,137 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:46:18,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:46:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:46:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:46:18,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:18,138 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 23:46:18,138 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:18,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 23:46:18,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:18,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:18,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:18,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:18,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:46:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:46:18,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:46:18,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:46:18,897 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:18,481 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:48:18,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:18,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:18,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:18,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:48:18,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:48:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:48:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:18,603 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 23:48:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:18,929 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:48:18,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:48:18,932 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 23:48:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:18,933 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:48:18,933 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:48:18,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:48:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:48:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:48:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:48:18,939 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 23:48:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:18,940 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:48:18,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:48:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:48:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:48:18,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:18,941 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 23:48:18,941 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:18,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 23:48:18,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:18,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:18,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:18,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:18,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:19,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:19,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:19,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:10,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:50:10,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:21,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:22,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:22,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:50:22,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:50:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:50:22,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:50:22,035 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 23:50:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:22,793 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:50:22,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:50:22,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 23:50:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:22,795 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:50:22,795 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:50:22,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:50:22,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:50:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:50:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:50:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:50:22,802 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 23:50:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:22,802 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:50:22,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:50:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:50:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:50:22,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:22,803 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 23:50:22,803 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:22,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:22,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 23:50:22,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:22,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:22,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:22,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:22,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:23,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:23,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:23,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:23,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:23,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:23,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:50:23,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:50:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:50:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:50:23,296 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 23:50:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:23,741 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:50:23,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:50:23,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 23:50:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:23,742 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:50:23,742 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:50:23,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:50:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:50:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:50:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:50:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:50:23,750 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 23:50:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:23,750 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:50:23,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:50:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:50:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:50:23,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:23,751 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 23:50:23,751 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:23,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 23:50:23,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:23,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:23,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:23,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:23,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:24,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:24,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:24,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:24,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:24,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:24,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:24,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:24,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:50:24,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:50:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:50:24,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:50:24,289 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 23:50:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:24,736 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:50:24,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:50:24,737 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 23:50:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:24,737 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:50:24,738 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:50:24,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:50:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:50:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:50:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:50:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:50:24,744 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 23:50:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:24,744 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:50:24,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:50:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:50:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:50:24,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:24,745 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 23:50:24,745 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:24,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:24,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 23:50:24,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:24,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:24,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:24,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:24,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:25,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:25,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:25,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:56,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:53:56,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:59,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:59,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:59,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:53:59,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:53:59,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:53:59,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:53:59,501 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 23:53:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:59,945 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:53:59,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:53:59,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 23:53:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:59,950 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:53:59,950 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:53:59,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:53:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:53:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:53:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:53:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:53:59,956 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 23:53:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:59,956 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:53:59,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:53:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:53:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:53:59,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:59,957 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 23:53:59,958 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:59,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 23:53:59,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:59,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:59,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:59,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:59,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:00,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:00,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:00,664 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:00,679 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:00,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:00,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:00,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:00,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:54:00,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:54:00,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:54:00,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:54:00,747 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 23:54:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:01,132 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:54:01,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:54:01,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 23:54:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:01,133 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:54:01,133 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:54:01,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:54:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:54:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:54:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:54:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:54:01,140 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 23:54:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:01,140 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:54:01,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:54:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:54:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:54:01,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:01,141 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 23:54:01,141 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:01,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:01,142 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 23:54:01,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:01,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:01,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:01,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:01,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:01,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:01,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:01,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:07,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:58:07,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:08,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:08,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:08,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:58:08,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:58:08,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:58:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:58:08,209 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 23:58:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:08,661 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:58:08,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:58:08,662 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 23:58:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:08,663 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:58:08,663 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:58:08,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:58:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:58:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:58:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:58:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:58:08,669 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 23:58:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:08,669 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:58:08,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:58:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:58:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:58:08,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:08,669 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 23:58:08,670 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:08,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 23:58:08,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:08,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:08,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:08,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:09,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:09,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:09,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown