java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:47:10,787 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:47:10,789 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:47:10,803 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 23:47:10,835 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 23:47:10,865 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:47:10,866 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:47:10,866 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:47:10,867 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:47:10,867 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:47:10,867 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:47:10,868 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:47:10,868 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:47:10,868 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:47:10,868 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:47:10,868 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:47:10,869 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:47:10,869 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:47:10,869 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:47:10,869 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:47:10,869 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:47:10,870 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:47:10,870 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:47:10,870 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:47:10,870 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:47:10,870 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:47:10,870 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:47:10,871 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:47:10,871 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:47:10,871 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:47:10,871 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:47:10,871 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:47:10,872 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:47:10,872 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:47:10,872 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:47:10,933 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:47:10,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:47:10,955 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:47:10,956 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:47:10,957 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:47:10,958 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-09-30 23:47:10,958 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-09-30 23:47:11,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:47:11,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:47:11,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:47:11,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:47:11,017 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:47:11,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:47:11,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:47:11,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:47:11,060 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:47:11,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/1) ... [2018-09-30 23:47:11,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:47:11,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:47:11,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:47:11,082 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:47:11,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (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 23:47:11,164 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 23:47:11,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:47:11,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:47:11,435 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:47:11,435 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:47:11 BoogieIcfgContainer [2018-09-30 23:47:11,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:47:11,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:47:11,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:47:11,442 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:47:11,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:47:11" (1/2) ... [2018-09-30 23:47:11,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed811b1 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:47:11, skipping insertion in model container [2018-09-30 23:47:11,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:47:11" (2/2) ... [2018-09-30 23:47:11,447 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-09-30 23:47:11,463 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:47:11,473 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:47:11,526 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:47:11,527 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:47:11,527 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:47:11,527 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:47:11,528 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:47:11,528 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:47:11,528 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:47:11,528 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:47:11,528 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:47:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-09-30 23:47:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:47:11,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:11,552 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 23:47:11,553 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:11,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:11,560 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-09-30 23:47:11,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:11,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:11,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:11,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:11,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:11,846 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 23:47:11,848 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:47:11,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:47:11,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:47:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:47:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:47:11,866 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-09-30 23:47:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:12,042 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-09-30 23:47:12,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:47:12,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:47:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:12,056 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:47:12,056 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:47:12,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:47:12,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:47:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-09-30 23:47:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:47:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-09-30 23:47:12,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-09-30 23:47:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:12,096 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-09-30 23:47:12,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:47:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-09-30 23:47:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:47:12,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:12,097 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:47:12,098 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:12,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:12,098 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-09-30 23:47:12,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:12,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:12,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:12,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:12,235 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:47:12,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:47:12,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:47:12,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:47:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:47:12,238 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-09-30 23:47:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:12,336 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-09-30 23:47:12,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:47:12,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-30 23:47:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:12,337 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:47:12,337 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:47:12,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:47:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:47:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-30 23:47:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:47:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-09-30 23:47:12,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-09-30 23:47:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:12,345 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-09-30 23:47:12,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:47:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-09-30 23:47:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:47:12,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:12,346 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:47:12,346 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:12,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-09-30 23:47:12,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:12,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:12,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:12,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:47:12,405 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:47:12,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:47:12,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:47:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:47:12,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:47:12,406 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-09-30 23:47:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:12,442 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-09-30 23:47:12,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:47:12,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-09-30 23:47:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:12,444 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:47:12,445 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:47:12,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:47:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:47:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-09-30 23:47:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:47:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 23:47:12,449 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 23:47:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:12,449 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 23:47:12,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:47:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 23:47:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:47:12,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:12,450 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:47:12,451 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:12,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-09-30 23:47:12,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:12,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:12,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:12,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:12,885 WARN L178 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-09-30 23:47:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:12,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:12,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:12,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:12,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:13,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:13,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-09-30 23:47:13,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:47:13,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:47:13,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:47:13,135 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-09-30 23:47:13,295 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-09-30 23:47:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:13,451 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-09-30 23:47:13,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:47:13,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-09-30 23:47:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:13,455 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:47:13,455 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:47:13,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:47:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:47:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-09-30 23:47:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:47:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 23:47:13,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-09-30 23:47:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:13,461 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 23:47:13,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:47:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 23:47:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:47:13,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:13,463 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:47:13,463 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:13,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:13,463 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-09-30 23:47:13,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:13,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:13,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:13,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:13,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:13,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:13,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:13,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:13,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:13,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:13,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-30 23:47:13,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:47:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:47:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:47:13,745 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-09-30 23:47:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:13,881 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-30 23:47:13,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:47:13,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:47:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:13,882 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:47:13,882 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:47:13,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:47:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:47:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-09-30 23:47:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:47:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-09-30 23:47:13,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-09-30 23:47:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:13,888 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-09-30 23:47:13,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:47:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-09-30 23:47:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:47:13,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:13,889 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:47:13,889 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:13,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-09-30 23:47:13,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:13,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:13,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:13,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:13,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:14,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:14,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:14,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:47:14,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:47:14,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:14,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:14,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:14,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 23:47:14,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:47:14,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:47:14,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:47:14,806 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-09-30 23:47:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:15,674 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-09-30 23:47:15,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:47:15,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-09-30 23:47:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:15,677 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:47:15,677 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:47:15,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:47:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:47:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-30 23:47:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:47:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-30 23:47:15,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-09-30 23:47:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:15,684 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-30 23:47:15,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:47:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-30 23:47:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:47:15,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:15,685 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:47:15,685 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:15,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-09-30 23:47:15,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:15,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:15,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:15,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:15,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:15,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:15,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:15,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:47:15,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:47:15,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:15,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:16,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:16,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-09-30 23:47:16,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:47:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:47:16,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:47:16,202 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-09-30 23:47:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:16,697 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-09-30 23:47:16,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:47:16,700 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-09-30 23:47:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:16,702 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:47:16,702 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:47:16,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:47:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:47:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 23:47:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:47:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 23:47:16,709 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-30 23:47:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:16,709 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 23:47:16,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:47:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 23:47:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:47:16,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:16,711 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:47:16,711 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:16,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:16,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-09-30 23:47:16,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:16,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:16,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:16,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:16,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:16,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:16,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:16,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:47:16,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:47:16,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:16,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:16,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:16,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-30 23:47:16,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:47:16,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:47:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:47:16,992 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-30 23:47:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:17,457 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-09-30 23:47:17,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:47:17,458 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-30 23:47:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:17,459 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:47:17,460 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:47:17,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:47:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:47:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-09-30 23:47:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:47:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 23:47:17,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-30 23:47:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:17,468 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 23:47:17,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:47:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 23:47:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:47:17,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:17,469 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:47:17,470 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:17,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-09-30 23:47:17,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:17,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:17,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:17,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:17,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:17,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:17,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:17,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:47:17,740 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 23:47:17,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:17,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:17,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:17,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 23:47:17,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:47:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:47:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:47:17,949 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-09-30 23:47:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:18,612 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-09-30 23:47:18,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:47:18,612 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-09-30 23:47:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:18,613 INFO L225 Difference]: With dead ends: 64 [2018-09-30 23:47:18,613 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:47:18,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:47:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:47:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-09-30 23:47:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:47:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-30 23:47:18,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-09-30 23:47:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:18,621 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-30 23:47:18,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:47:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-30 23:47:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:47:18,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:18,622 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 23:47:18,622 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:18,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:18,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-09-30 23:47:18,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:18,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:18,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:18,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:18,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:18,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:18,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:18,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:47:18,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 23:47:18,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:18,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:18,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:18,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 23:47:18,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:47:18,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:47:18,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:47:18,975 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-09-30 23:47:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:19,166 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-30 23:47:19,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:47:19,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-09-30 23:47:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:19,168 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:47:19,169 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:47:19,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:47:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:47:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-09-30 23:47:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:47:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-30 23:47:19,178 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-09-30 23:47:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:19,178 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-30 23:47:19,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:47:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-30 23:47:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:47:19,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:19,180 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 23:47:19,180 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:19,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-09-30 23:47:19,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:19,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:19,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:19,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:19,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:19,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:19,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:19,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:19,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:20,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:20,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-09-30 23:47:20,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:47:20,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:47:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:47:20,244 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-09-30 23:47:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:20,994 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-09-30 23:47:20,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:47:20,994 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-09-30 23:47:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:20,996 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:47:20,996 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:47:20,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:47:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:47:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-09-30 23:47:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:47:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-30 23:47:21,005 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-09-30 23:47:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:21,005 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-30 23:47:21,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:47:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-30 23:47:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:47:21,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:21,006 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 23:47:21,007 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:21,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-09-30 23:47:21,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:21,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:21,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:21,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:21,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:21,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:21,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:21,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:47:21,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:47:21,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:21,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:21,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:21,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-30 23:47:21,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:47:21,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:47:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:47:21,469 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-09-30 23:47:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:21,939 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-09-30 23:47:21,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:47:21,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-09-30 23:47:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:21,941 INFO L225 Difference]: With dead ends: 90 [2018-09-30 23:47:21,941 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:47:21,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:47:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:47:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-09-30 23:47:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:47:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-30 23:47:21,948 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-09-30 23:47:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:21,949 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-30 23:47:21,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:47:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-30 23:47:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:47:21,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:21,950 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 23:47:21,950 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:21,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:21,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-09-30 23:47:21,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:21,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:21,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:21,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:21,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:22,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:22,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:22,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:47:22,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:47:22,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:22,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:22,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:22,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-09-30 23:47:22,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:47:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:47:22,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:47:22,803 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-09-30 23:47:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:25,782 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-30 23:47:25,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:47:25,782 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-09-30 23:47:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:25,784 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:47:25,784 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:47:25,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:47:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:47:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-09-30 23:47:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:47:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 23:47:25,795 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-09-30 23:47:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:25,795 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 23:47:25,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:47:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 23:47:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:47:25,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:25,796 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-30 23:47:25,796 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:25,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-09-30 23:47:25,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:25,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:25,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:26,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:26,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:26,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:47:26,138 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:47:26,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:26,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:26,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:26,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-09-30 23:47:26,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:47:26,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:47:26,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:47:26,427 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-30 23:47:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:27,447 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-09-30 23:47:27,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:47:27,448 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-30 23:47:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:27,449 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:47:27,449 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:47:27,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:47:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:47:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-09-30 23:47:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:47:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 23:47:27,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-09-30 23:47:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:27,460 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 23:47:27,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:47:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 23:47:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:47:27,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:27,461 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 23:47:27,462 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:27,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-09-30 23:47:27,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:27,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:27,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:27,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:27,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:27,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:27,665 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 23:47:27,672 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:47:27,692 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:47:27,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:27,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:28,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:28,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-30 23:47:28,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:47:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:47:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:47:28,010 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-09-30 23:47:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:28,593 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-09-30 23:47:28,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:47:28,594 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-09-30 23:47:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:28,595 INFO L225 Difference]: With dead ends: 120 [2018-09-30 23:47:28,595 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:47:28,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:47:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:47:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-09-30 23:47:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:47:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 23:47:28,605 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-09-30 23:47:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:28,606 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 23:47:28,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:47:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 23:47:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:47:28,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:28,607 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 23:47:28,607 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:28,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:28,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-09-30 23:47:28,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:28,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:28,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:28,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:28,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:28,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:28,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:28,963 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:47:28,982 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:47:28,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:28,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:29,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:29,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-09-30 23:47:29,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:47:29,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:47:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:47:29,403 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-09-30 23:47:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:31,232 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-09-30 23:47:31,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:47:31,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-09-30 23:47:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:31,240 INFO L225 Difference]: With dead ends: 124 [2018-09-30 23:47:31,240 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 23:47:31,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:47:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 23:47:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-09-30 23:47:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:47:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-30 23:47:31,260 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-09-30 23:47:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:31,261 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-30 23:47:31,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:47:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-30 23:47:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:47:31,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:31,262 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 23:47:31,262 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:31,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:31,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-09-30 23:47:31,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:31,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:31,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:31,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:31,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:32,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:32,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:32,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:32,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:32,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:32,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-30 23:47:32,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:47:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:47:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:47:32,444 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-09-30 23:47:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:32,969 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-30 23:47:32,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:47:32,973 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-09-30 23:47:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:32,974 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:47:32,974 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:47:32,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:47:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:47:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-09-30 23:47:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:47:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 23:47:32,983 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-30 23:47:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:32,983 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 23:47:32,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:47:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 23:47:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:47:32,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:32,984 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 23:47:32,985 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:32,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-09-30 23:47:32,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:32,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:32,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:32,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:32,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:33,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:33,402 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 23:47:33,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:47:33,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:47:33,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:33,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:34,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:34,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-09-30 23:47:34,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:47:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:47:34,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:47:34,234 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-09-30 23:47:35,331 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-09-30 23:47:37,060 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-09-30 23:47:37,619 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-30 23:47:38,556 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-09-30 23:47:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:39,415 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-30 23:47:39,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:47:39,416 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-09-30 23:47:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:39,417 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:47:39,417 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 23:47:39,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=829, Invalid=8483, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:47:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 23:47:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-09-30 23:47:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:47:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 23:47:39,430 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-09-30 23:47:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:39,431 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 23:47:39,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:47:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 23:47:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:47:39,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:39,432 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-30 23:47:39,432 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:39,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:39,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-09-30 23:47:39,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:39,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:39,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:39,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:39,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:40,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:40,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:40,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:47:40,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 23:47:40,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:40,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:41,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:41,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-09-30 23:47:41,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:47:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:47:41,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:47:41,219 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-09-30 23:47:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:45,445 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-09-30 23:47:45,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:47:45,445 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-09-30 23:47:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:45,446 INFO L225 Difference]: With dead ends: 192 [2018-09-30 23:47:45,446 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:47:45,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=969, Invalid=10373, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:47:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:47:45,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-09-30 23:47:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:47:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 23:47:45,462 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-09-30 23:47:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:45,462 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 23:47:45,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:47:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 23:47:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 23:47:45,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:45,463 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-30 23:47:45,463 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:45,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:45,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-09-30 23:47:45,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:45,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:45,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:45,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:45,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:46,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:46,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:46,232 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:47:46,246 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:47:46,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:46,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:46,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:46,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-09-30 23:47:46,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:47:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:47:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:47:46,664 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-09-30 23:47:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:49,095 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-09-30 23:47:49,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:47:49,095 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-09-30 23:47:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:49,096 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:47:49,096 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:47:49,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:47:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:47:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-09-30 23:47:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 23:47:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-30 23:47:49,111 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-09-30 23:47:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:49,111 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-30 23:47:49,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:47:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-30 23:47:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:47:49,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:49,112 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 23:47:49,113 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:49,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-09-30 23:47:49,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:49,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:49,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:49,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:49,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:49,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:49,502 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 23:47:49,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:47:49,530 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:47:49,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:49,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:49,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:49,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-30 23:47:49,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:47:49,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:47:49,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:47:49,826 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-09-30 23:47:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:50,335 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-09-30 23:47:50,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:47:50,335 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-09-30 23:47:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:50,336 INFO L225 Difference]: With dead ends: 180 [2018-09-30 23:47:50,336 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:47:50,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:47:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:47:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-09-30 23:47:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:47:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-30 23:47:50,349 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-09-30 23:47:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:50,349 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-30 23:47:50,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:47:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-30 23:47:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:47:50,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:50,350 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 23:47:50,350 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:50,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-09-30 23:47:50,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:50,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:50,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:50,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:50,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:51,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:51,369 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 23:47:51,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:47:51,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:47:51,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:51,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:51,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:51,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-09-30 23:47:51,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:47:51,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:47:51,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:47:51,885 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-09-30 23:47:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:54,678 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-09-30 23:47:54,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:47:54,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-09-30 23:47:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:54,683 INFO L225 Difference]: With dead ends: 184 [2018-09-30 23:47:54,683 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 23:47:54,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:47:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 23:47:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-09-30 23:47:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:47:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 23:47:54,697 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-30 23:47:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:54,698 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 23:47:54,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:47:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 23:47:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:47:54,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:54,699 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 23:47:54,699 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:54,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-09-30 23:47:54,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:54,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:54,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:54,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:47:54,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:55,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:55,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:55,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:55,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:55,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:55,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-30 23:47:55,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:47:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:47:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:47:55,590 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-09-30 23:47:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:47:56,402 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-30 23:47:56,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:47:56,403 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-09-30 23:47:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:47:56,404 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:47:56,405 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 23:47:56,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:47:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 23:47:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-09-30 23:47:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 23:47:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 23:47:56,416 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-09-30 23:47:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:47:56,416 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 23:47:56,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:47:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 23:47:56,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 23:47:56,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:47:56,418 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 23:47:56,418 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:47:56,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:47:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-09-30 23:47:56,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:47:56,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:47:56,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:56,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:47:56,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:47:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:47:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:57,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:47:57,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:47:57,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:47:57,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:47:57,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:47:57,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:47:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:47:58,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:47:58,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-09-30 23:47:58,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:47:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:47:58,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3030, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:47:58,343 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-09-30 23:48:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:04,798 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-09-30 23:48:04,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:48:04,798 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-09-30 23:48:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:04,799 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:48:04,799 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 23:48:04,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1449, Invalid=17183, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:48:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 23:48:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-09-30 23:48:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:48:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 23:48:04,814 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-09-30 23:48:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:04,815 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 23:48:04,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:48:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 23:48:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:48:04,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:04,816 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-30 23:48:04,816 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:04,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-09-30 23:48:04,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:04,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:04,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:04,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:04,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:05,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:05,524 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 23:48:05,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:05,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:48:05,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:05,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:06,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:06,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-09-30 23:48:06,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:48:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:48:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:48:06,360 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-09-30 23:48:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:09,689 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-09-30 23:48:09,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:48:09,689 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-09-30 23:48:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:09,691 INFO L225 Difference]: With dead ends: 214 [2018-09-30 23:48:09,691 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 23:48:09,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=445, Invalid=5105, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:48:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 23:48:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-09-30 23:48:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:48:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-30 23:48:09,706 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-09-30 23:48:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:09,706 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-30 23:48:09,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:48:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-30 23:48:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:48:09,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:09,707 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 23:48:09,707 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:09,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-09-30 23:48:09,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:09,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:09,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:09,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:09,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:10,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:10,090 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 23:48:10,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:10,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:10,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:10,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:10,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:10,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-30 23:48:10,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:48:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:48:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:48:10,593 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-30 23:48:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:11,564 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-30 23:48:11,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:48:11,565 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-30 23:48:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:11,566 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:48:11,566 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 23:48:11,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:48:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 23:48:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-09-30 23:48:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 23:48:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-30 23:48:11,583 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-09-30 23:48:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:11,583 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-30 23:48:11,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:48:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-30 23:48:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:48:11,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:11,584 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 23:48:11,584 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:11,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-09-30 23:48:11,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:11,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:11,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:11,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:11,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:12,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:12,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:12,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:12,443 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:48:12,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:12,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:13,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:13,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-09-30 23:48:13,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:48:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:48:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:48:13,112 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-09-30 23:48:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:17,228 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-09-30 23:48:17,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:48:17,237 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-09-30 23:48:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:17,238 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:48:17,238 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:48:17,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=491, Invalid=5829, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:48:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:48:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-09-30 23:48:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 23:48:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 23:48:17,260 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-30 23:48:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:17,261 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 23:48:17,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:48:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 23:48:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 23:48:17,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:17,262 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 23:48:17,262 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:17,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-09-30 23:48:17,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:17,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:17,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:17,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:17,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:18,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:18,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:18,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:18,666 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:48:18,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:18,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:19,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:19,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-30 23:48:19,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:48:19,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:48:19,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:48:19,138 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-09-30 23:48:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:20,702 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-09-30 23:48:20,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:48:20,702 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-09-30 23:48:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:20,704 INFO L225 Difference]: With dead ends: 240 [2018-09-30 23:48:20,704 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:48:20,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:48:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:48:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-09-30 23:48:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:48:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 23:48:20,726 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-09-30 23:48:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:20,726 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 23:48:20,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:48:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 23:48:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:48:20,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:20,727 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 23:48:20,727 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:20,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:20,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-09-30 23:48:20,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:20,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:20,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:20,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:20,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:21,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:21,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:21,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:21,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:22,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:22,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-09-30 23:48:22,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:48:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:48:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:48:22,704 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-09-30 23:48:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:27,044 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-09-30 23:48:27,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:48:27,044 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-09-30 23:48:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:27,046 INFO L225 Difference]: With dead ends: 244 [2018-09-30 23:48:27,046 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 23:48:27,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=539, Invalid=6601, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:48:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 23:48:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-09-30 23:48:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:48:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 23:48:27,070 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-09-30 23:48:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:27,070 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 23:48:27,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:48:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 23:48:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:48:27,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:27,071 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 23:48:27,071 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:27,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:27,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-09-30 23:48:27,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:27,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:27,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:27,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:27,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:27,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:27,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:27,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:27,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:27,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:27,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:28,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:28,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-30 23:48:28,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:48:28,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:48:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:48:28,336 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-09-30 23:48:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:29,475 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-09-30 23:48:29,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:48:29,475 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-09-30 23:48:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:29,476 INFO L225 Difference]: With dead ends: 255 [2018-09-30 23:48:29,476 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 23:48:29,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1157, Invalid=3673, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:48:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 23:48:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-09-30 23:48:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 23:48:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-30 23:48:29,497 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-09-30 23:48:29,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:29,497 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-30 23:48:29,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:48:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-30 23:48:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 23:48:29,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:29,498 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 23:48:29,498 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:29,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-09-30 23:48:29,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:29,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:29,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:29,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:29,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:30,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:30,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:30,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:30,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:48:30,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:30,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:33,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:33,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-09-30 23:48:33,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:48:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:48:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4940, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:48:33,055 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-09-30 23:48:42,041 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-09-30 23:48:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:43,231 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-09-30 23:48:43,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:48:43,231 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-09-30 23:48:43,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:43,233 INFO L225 Difference]: With dead ends: 325 [2018-09-30 23:48:43,233 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 23:48:43,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2229, Invalid=28923, Unknown=0, NotChecked=0, Total=31152 [2018-09-30 23:48:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 23:48:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-09-30 23:48:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:48:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-30 23:48:43,255 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-09-30 23:48:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:43,255 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-30 23:48:43,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:48:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-30 23:48:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:48:43,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:43,256 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-30 23:48:43,256 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:43,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-09-30 23:48:43,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:43,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:43,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:43,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:43,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:44,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:44,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:44,235 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:44,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:44,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:44,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:45,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:45,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-09-30 23:48:45,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:48:45,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:48:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:48:45,230 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-30 23:48:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:51,256 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-09-30 23:48:51,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:48:51,256 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-30 23:48:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:51,257 INFO L225 Difference]: With dead ends: 274 [2018-09-30 23:48:51,258 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 23:48:51,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=641, Invalid=8289, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:48:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 23:48:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-09-30 23:48:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:48:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 23:48:51,289 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-30 23:48:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:51,290 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 23:48:51,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:48:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 23:48:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:48:51,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:51,291 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 23:48:51,291 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:51,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-09-30 23:48:51,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:51,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:51,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:51,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:51,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:52,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:52,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:52,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:52,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:48:52,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:52,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:53,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:53,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-09-30 23:48:53,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:48:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:48:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:48:53,375 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-09-30 23:48:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:54,568 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-09-30 23:48:54,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:48:54,568 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-09-30 23:48:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:54,570 INFO L225 Difference]: With dead ends: 285 [2018-09-30 23:48:54,570 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 23:48:54,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:48:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 23:48:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-09-30 23:48:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 23:48:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 23:48:54,599 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-30 23:48:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:54,600 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 23:48:54,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:48:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 23:48:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 23:48:54,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:54,601 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 23:48:54,601 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:54,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-09-30 23:48:54,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:54,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:54,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:54,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:54,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:55,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:55,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:55,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:55,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 23:48:55,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:55,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:58,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:58,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-09-30 23:48:58,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:48:58,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:48:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=6069, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:48:58,858 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-09-30 23:49:08,195 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-09-30 23:49:08,443 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-09-30 23:49:08,695 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2018-09-30 23:49:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:10,710 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-09-30 23:49:10,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:49:10,710 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-09-30 23:49:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:10,712 INFO L225 Difference]: With dead ends: 363 [2018-09-30 23:49:10,712 INFO L226 Difference]: Without dead ends: 212 [2018-09-30 23:49:10,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8563 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=2679, Invalid=35933, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 23:49:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-30 23:49:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-09-30 23:49:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:49:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-30 23:49:10,746 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-09-30 23:49:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:10,746 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-30 23:49:10,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:49:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-30 23:49:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:49:10,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:10,747 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-09-30 23:49:10,748 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:10,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-09-30 23:49:10,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:10,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:10,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:10,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:10,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:11,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:11,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:11,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:12,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:13,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:13,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-09-30 23:49:13,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:49:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:49:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:49:13,342 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-09-30 23:49:18,462 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-30 23:49:18,738 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-30 23:49:19,001 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-09-30 23:49:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:20,866 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-09-30 23:49:20,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:49:20,867 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-09-30 23:49:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:20,868 INFO L225 Difference]: With dead ends: 304 [2018-09-30 23:49:20,868 INFO L226 Difference]: Without dead ends: 226 [2018-09-30 23:49:20,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=751, Invalid=10169, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:49:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-30 23:49:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-09-30 23:49:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:49:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-30 23:49:20,893 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-09-30 23:49:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:20,894 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-30 23:49:20,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:49:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-30 23:49:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:49:20,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:20,894 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 23:49:20,895 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:20,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-09-30 23:49:20,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:20,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:20,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:20,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:20,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:21,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:21,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:21,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:21,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:21,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:21,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:22,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:22,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-30 23:49:22,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:49:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:49:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:49:22,738 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-09-30 23:49:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:24,229 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-09-30 23:49:24,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:49:24,230 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-09-30 23:49:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:24,231 INFO L225 Difference]: With dead ends: 315 [2018-09-30 23:49:24,231 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 23:49:24,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:49:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 23:49:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-09-30 23:49:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 23:49:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-09-30 23:49:24,265 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-09-30 23:49:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:24,265 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-09-30 23:49:24,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:49:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-09-30 23:49:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 23:49:24,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:24,267 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 23:49:24,267 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:24,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-09-30 23:49:24,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:24,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:24,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:24,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:24,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:25,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:25,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:25,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:49:25,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:49:25,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:25,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:28,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:28,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-09-30 23:49:28,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:49:28,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:49:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=7314, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:49:28,808 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-09-30 23:49:39,459 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-09-30 23:49:39,728 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-09-30 23:49:39,998 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-30 23:49:40,233 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:49:40,881 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-09-30 23:49:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:42,529 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-09-30 23:49:42,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:49:42,530 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-09-30 23:49:42,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:42,531 INFO L225 Difference]: With dead ends: 401 [2018-09-30 23:49:42,532 INFO L226 Difference]: Without dead ends: 234 [2018-09-30 23:49:42,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=3169, Invalid=43703, Unknown=0, NotChecked=0, Total=46872 [2018-09-30 23:49:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-30 23:49:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-09-30 23:49:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:49:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-30 23:49:42,571 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-09-30 23:49:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:42,571 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-30 23:49:42,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:49:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-30 23:49:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:49:42,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:42,572 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-09-30 23:49:42,572 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:42,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-09-30 23:49:42,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:42,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:42,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:42,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:42,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:44,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:44,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:44,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:44,524 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:44,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:44,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:45,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:45,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-09-30 23:49:45,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:49:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:49:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:49:45,880 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-09-30 23:49:51,031 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-09-30 23:49:51,341 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-09-30 23:49:51,640 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-09-30 23:49:51,846 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:49:52,030 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:49:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:54,125 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-09-30 23:49:54,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:49:54,126 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-09-30 23:49:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:54,128 INFO L225 Difference]: With dead ends: 334 [2018-09-30 23:49:54,128 INFO L226 Difference]: Without dead ends: 248 [2018-09-30 23:49:54,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=869, Invalid=12241, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:49:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-30 23:49:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-09-30 23:49:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:49:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-30 23:49:54,157 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-09-30 23:49:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:54,158 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-30 23:49:54,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:49:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-30 23:49:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:49:54,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:54,159 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 23:49:54,159 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:54,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-09-30 23:49:54,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:54,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:54,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:54,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:54,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:55,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:55,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:55,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:55,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-09-30 23:49:55,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:55,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:57,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:57,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-09-30 23:49:57,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:49:57,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:49:57,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:49:57,110 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-09-30 23:49:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:58,774 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-09-30 23:49:58,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:49:58,775 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-09-30 23:49:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:58,776 INFO L225 Difference]: With dead ends: 345 [2018-09-30 23:49:58,776 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 23:49:58,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:49:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 23:49:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-09-30 23:49:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 23:49:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-30 23:49:58,805 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-09-30 23:49:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:58,805 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-30 23:49:58,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:49:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-30 23:49:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 23:49:58,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:58,806 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 23:49:58,806 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:58,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:58,806 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-09-30 23:49:58,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:58,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:58,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:58,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:58,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:00,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:00,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:00,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:00,598 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-30 23:50:00,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:00,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:02,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:02,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-09-30 23:50:02,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:50:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:50:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5208, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:50:02,073 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-09-30 23:50:08,695 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-09-30 23:50:09,063 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-09-30 23:50:09,444 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-09-30 23:50:09,657 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:50:09,860 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:50:10,049 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:50:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:12,103 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-09-30 23:50:12,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:50:12,103 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-09-30 23:50:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:12,105 INFO L225 Difference]: With dead ends: 349 [2018-09-30 23:50:12,106 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:50:12,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=931, Invalid=13349, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:50:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:50:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-09-30 23:50:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 23:50:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-09-30 23:50:12,138 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-09-30 23:50:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:12,138 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-09-30 23:50:12,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:50:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-09-30 23:50:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 23:50:12,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:12,139 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 23:50:12,139 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:12,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-09-30 23:50:12,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:12,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:12,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:13,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:13,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:13,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:13,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:14,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:14,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-09-30 23:50:14,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:50:14,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:50:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:50:14,847 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-09-30 23:50:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:16,578 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-09-30 23:50:16,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:50:16,581 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-09-30 23:50:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:16,582 INFO L225 Difference]: With dead ends: 360 [2018-09-30 23:50:16,582 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:50:16,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:50:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:50:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-09-30 23:50:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:50:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-30 23:50:16,611 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-09-30 23:50:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:16,611 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-30 23:50:16,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:50:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-30 23:50:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:50:16,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:16,612 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 23:50:16,612 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:16,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:16,612 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-09-30 23:50:16,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:16,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:16,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:16,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:16,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:18,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:18,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:18,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:18,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:18,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:18,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:20,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:20,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-09-30 23:50:20,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:50:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:50:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5650, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:50:20,410 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-09-30 23:50:27,036 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-09-30 23:50:27,386 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-09-30 23:50:27,750 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-09-30 23:50:27,985 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:50:28,212 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:50:28,432 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:50:28,636 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:50:28,840 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-09-30 23:50:29,626 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-09-30 23:50:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:30,932 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-09-30 23:50:30,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:50:30,932 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-09-30 23:50:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:30,933 INFO L225 Difference]: With dead ends: 364 [2018-09-30 23:50:30,934 INFO L226 Difference]: Without dead ends: 270 [2018-09-30 23:50:30,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=995, Invalid=14505, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:50:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-09-30 23:50:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-09-30 23:50:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:50:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 23:50:30,967 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-30 23:50:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:30,967 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 23:50:30,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:50:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 23:50:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:50:30,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:30,968 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 23:50:30,968 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:30,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-09-30 23:50:30,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:30,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:30,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:30,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:30,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:33,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:33,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:33,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:33,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-30 23:50:33,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:33,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:34,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:34,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-30 23:50:34,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:50:34,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:50:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:50:34,370 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-09-30 23:50:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:36,392 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-09-30 23:50:36,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:50:36,393 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-09-30 23:50:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:36,394 INFO L225 Difference]: With dead ends: 375 [2018-09-30 23:50:36,395 INFO L226 Difference]: Without dead ends: 180 [2018-09-30 23:50:36,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:50:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-09-30 23:50:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-09-30 23:50:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 23:50:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-30 23:50:36,430 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-09-30 23:50:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:36,430 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-30 23:50:36,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:50:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-30 23:50:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-30 23:50:36,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:36,431 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 23:50:36,431 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:36,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-09-30 23:50:36,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:36,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:36,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:36,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:36,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:39,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:39,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:39,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:39,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:39,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:39,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:41,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:41,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-09-30 23:50:41,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:50:41,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:50:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:50:41,157 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-09-30 23:50:48,055 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-09-30 23:50:48,431 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-09-30 23:50:48,786 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-09-30 23:50:49,031 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:50:49,267 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:50:49,494 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:50:49,715 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:50:49,960 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:50:50,220 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-09-30 23:50:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:52,262 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-09-30 23:50:52,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:50:52,262 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-09-30 23:50:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:52,264 INFO L225 Difference]: With dead ends: 379 [2018-09-30 23:50:52,265 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 23:50:52,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1061, Invalid=15709, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:50:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 23:50:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-09-30 23:50:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 23:50:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-30 23:50:52,301 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-09-30 23:50:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:52,302 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-30 23:50:52,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:50:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-30 23:50:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-30 23:50:52,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:52,302 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 23:50:52,303 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:52,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:52,303 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-09-30 23:50:52,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:52,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:52,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:52,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:53,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:53,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:53,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:53,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 23:50:53,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:53,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:54,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:54,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-09-30 23:50:54,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:50:54,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:50:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:50:54,513 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-09-30 23:50:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:56,683 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-09-30 23:50:56,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:50:56,684 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-09-30 23:50:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:56,685 INFO L225 Difference]: With dead ends: 390 [2018-09-30 23:50:56,685 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:50:56,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:50:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:50:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-09-30 23:50:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:50:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 23:50:56,736 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-09-30 23:50:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:56,736 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 23:50:56,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:50:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 23:50:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:50:56,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:56,738 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 23:50:56,738 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:56,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-09-30 23:50:56,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:56,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:56,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:56,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:58,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:58,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:58,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:58,749 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-30 23:50:58,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:58,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:00,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:00,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-09-30 23:51:00,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:51:00,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:51:00,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6588, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:51:00,854 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-09-30 23:51:08,172 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-09-30 23:51:08,566 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-09-30 23:51:08,937 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-09-30 23:51:09,205 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:51:09,457 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:51:09,702 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:51:09,936 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:51:10,156 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:51:10,397 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:51:10,664 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-09-30 23:51:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:12,811 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-09-30 23:51:12,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:51:12,811 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-09-30 23:51:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:12,813 INFO L225 Difference]: With dead ends: 394 [2018-09-30 23:51:12,813 INFO L226 Difference]: Without dead ends: 292 [2018-09-30 23:51:12,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:51:12,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-09-30 23:51:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-09-30 23:51:12,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:51:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-30 23:51:12,852 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-09-30 23:51:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:12,853 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-30 23:51:12,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:51:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-30 23:51:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:51:12,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:12,854 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 23:51:12,854 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:12,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-09-30 23:51:12,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:12,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:12,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:12,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:12,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:14,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:14,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:14,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:14,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:15,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:15,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-09-30 23:51:15,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:51:15,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:51:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:51:15,983 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-09-30 23:51:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:18,163 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-09-30 23:51:18,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:51:18,164 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-09-30 23:51:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:18,165 INFO L225 Difference]: With dead ends: 405 [2018-09-30 23:51:18,165 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 23:51:18,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2782, Invalid=9208, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:51:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 23:51:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-09-30 23:51:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-09-30 23:51:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-09-30 23:51:18,205 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-09-30 23:51:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:18,205 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-09-30 23:51:18,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:51:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-09-30 23:51:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 23:51:18,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:18,206 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 23:51:18,206 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:18,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-09-30 23:51:18,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:18,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:18,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:18,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:18,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 26 proven. 2432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:21,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:21,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:21,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:21,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:21,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:21,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 1352 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:29,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:29,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 114 [2018-09-30 23:51:29,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:51:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:51:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1365, Invalid=11745, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:51:29,502 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 115 states. [2018-09-30 23:51:47,065 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2018-09-30 23:51:47,504 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2018-09-30 23:51:47,951 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-09-30 23:51:48,312 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:51:48,655 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:51:48,996 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:51:49,323 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:51:49,641 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:51:49,954 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:51:50,245 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:51:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:53,212 INFO L93 Difference]: Finished difference Result 515 states and 521 transitions. [2018-09-30 23:51:53,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-09-30 23:51:53,212 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 191 [2018-09-30 23:51:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:53,214 INFO L225 Difference]: With dead ends: 515 [2018-09-30 23:51:53,214 INFO L226 Difference]: Without dead ends: 300 [2018-09-30 23:51:53,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17131 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=4879, Invalid=71573, Unknown=0, NotChecked=0, Total=76452 [2018-09-30 23:51:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-09-30 23:51:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 199. [2018-09-30 23:51:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:51:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-30 23:51:53,266 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 191 [2018-09-30 23:51:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:53,266 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-30 23:51:53,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:51:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-30 23:51:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:51:53,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:53,267 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-09-30 23:51:53,267 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:53,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash -303839985, now seen corresponding path program 45 times [2018-09-30 23:51:53,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:53,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:53,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:53,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:53,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 27 proven. 2620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:55,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:55,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:55,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:56,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 23:51:56,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:56,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 27 proven. 2620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:58,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:58,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 88 [2018-09-30 23:51:58,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:51:58,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:51:58,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=7598, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:51:58,259 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 89 states. [2018-09-30 23:52:06,727 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2018-09-30 23:52:07,288 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2018-09-30 23:52:07,706 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2018-09-30 23:52:07,995 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:52:08,282 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:52:08,563 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:52:08,851 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:52:09,118 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:52:09,372 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:52:09,611 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:52:09,834 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:52:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:12,425 INFO L93 Difference]: Finished difference Result 424 states and 429 transitions. [2018-09-30 23:52:12,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:52:12,425 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 198 [2018-09-30 23:52:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:12,426 INFO L225 Difference]: With dead ends: 424 [2018-09-30 23:52:12,426 INFO L226 Difference]: Without dead ends: 314 [2018-09-30 23:52:12,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3253 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1271, Invalid=19609, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:52:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-09-30 23:52:12,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 203. [2018-09-30 23:52:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:52:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-30 23:52:12,480 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 198 [2018-09-30 23:52:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:12,481 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-30 23:52:12,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:52:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-30 23:52:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:52:12,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:12,482 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1] [2018-09-30 23:52:12,482 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:12,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1908736842, now seen corresponding path program 46 times [2018-09-30 23:52:12,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:12,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:12,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:12,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:12,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 1596 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:13,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:13,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:13,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:13,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:13,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:13,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 1596 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:15,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:15,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-30 23:52:15,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:52:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:52:15,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:52:15,258 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 89 states. [2018-09-30 23:52:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:17,961 INFO L93 Difference]: Finished difference Result 435 states and 439 transitions. [2018-09-30 23:52:17,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:52:17,961 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 202 [2018-09-30 23:52:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:17,963 INFO L225 Difference]: With dead ends: 435 [2018-09-30 23:52:17,963 INFO L226 Difference]: Without dead ends: 208 [2018-09-30 23:52:17,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3191, Invalid=10615, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:52:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-30 23:52:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2018-09-30 23:52:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-30 23:52:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-09-30 23:52:18,016 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-09-30 23:52:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:18,016 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-09-30 23:52:18,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:52:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-09-30 23:52:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-30 23:52:18,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:18,018 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-09-30 23:52:18,018 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:18,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1062571566, now seen corresponding path program 47 times [2018-09-30 23:52:18,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:18,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:18,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:18,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:18,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 28 proven. 2815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:20,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:20,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:20,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:20,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:52:20,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:20,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 28 proven. 2815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:22,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:22,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 91 [2018-09-30 23:52:22,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:52:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:52:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=8130, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:52:22,542 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 92 states. [2018-09-30 23:52:33,183 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2018-09-30 23:52:33,633 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2018-09-30 23:52:34,074 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2018-09-30 23:52:34,375 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:52:34,683 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:52:34,972 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:52:35,256 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:52:35,527 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:52:35,787 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:52:36,041 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:52:36,277 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:52:36,513 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:52:37,637 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-09-30 23:52:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:39,187 INFO L93 Difference]: Finished difference Result 439 states and 444 transitions. [2018-09-30 23:52:39,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:52:39,187 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 205 [2018-09-30 23:52:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:39,189 INFO L225 Difference]: With dead ends: 439 [2018-09-30 23:52:39,189 INFO L226 Difference]: Without dead ends: 325 [2018-09-30 23:52:39,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1345, Invalid=21005, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:52:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-09-30 23:52:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 210. [2018-09-30 23:52:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 23:52:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-09-30 23:52:39,243 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 205 [2018-09-30 23:52:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:39,243 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-09-30 23:52:39,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:52:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-09-30 23:52:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 23:52:39,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:39,245 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1] [2018-09-30 23:52:39,245 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:39,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:39,245 INFO L82 PathProgramCache]: Analyzing trace with hash -782950827, now seen corresponding path program 48 times [2018-09-30 23:52:39,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:39,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:39,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:39,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 1711 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:40,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:40,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:40,610 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:40,738 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 23:52:40,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:40,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 1711 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:42,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:42,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-09-30 23:52:42,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:52:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:52:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:52:42,268 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 92 states. [2018-09-30 23:52:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:45,117 INFO L93 Difference]: Finished difference Result 450 states and 454 transitions. [2018-09-30 23:52:45,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:52:45,118 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 209 [2018-09-30 23:52:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:45,119 INFO L225 Difference]: With dead ends: 450 [2018-09-30 23:52:45,119 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:52:45,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3406, Invalid=11356, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:52:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:52:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2018-09-30 23:52:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 23:52:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-09-30 23:52:45,174 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 209 [2018-09-30 23:52:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:45,174 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-09-30 23:52:45,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:52:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-09-30 23:52:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:52:45,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:45,175 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-09-30 23:52:45,176 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:45,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash -890079779, now seen corresponding path program 49 times [2018-09-30 23:52:45,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:45,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:45,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:45,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 29 proven. 3017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:47,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:47,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:47,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:48,591 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-30 23:52:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 29 proven. 3017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:50,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:50,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 94 [2018-09-30 23:52:50,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:52:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:52:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=8680, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:52:50,985 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 95 states. [2018-09-30 23:53:01,261 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2018-09-30 23:53:01,741 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2018-09-30 23:53:02,200 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2018-09-30 23:53:02,517 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:53:02,850 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:53:03,203 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:53:03,511 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:53:03,808 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:53:04,088 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:53:04,362 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:53:04,626 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:53:04,879 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:53:05,130 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:53:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:07,725 INFO L93 Difference]: Finished difference Result 454 states and 459 transitions. [2018-09-30 23:53:07,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:53:07,725 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 212 [2018-09-30 23:53:07,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:07,727 INFO L225 Difference]: With dead ends: 454 [2018-09-30 23:53:07,727 INFO L226 Difference]: Without dead ends: 336 [2018-09-30 23:53:07,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3725 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1421, Invalid=22449, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:53:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-09-30 23:53:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 217. [2018-09-30 23:53:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:53:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-30 23:53:07,791 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 212 [2018-09-30 23:53:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:07,791 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-30 23:53:07,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:53:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-30 23:53:07,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 23:53:07,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:07,792 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1] [2018-09-30 23:53:07,793 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:07,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash -272066940, now seen corresponding path program 50 times [2018-09-30 23:53:07,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:07,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:07,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:07,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:07,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 1830 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:09,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:09,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:09,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:09,504 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:09,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:09,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 1830 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:11,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:11,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2018-09-30 23:53:11,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:53:11,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:53:11,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2078, Invalid=6852, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:53:11,139 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 95 states. [2018-09-30 23:53:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:14,101 INFO L93 Difference]: Finished difference Result 465 states and 469 transitions. [2018-09-30 23:53:14,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:53:14,101 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 216 [2018-09-30 23:53:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:14,103 INFO L225 Difference]: With dead ends: 465 [2018-09-30 23:53:14,103 INFO L226 Difference]: Without dead ends: 222 [2018-09-30 23:53:14,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3628, Invalid=12122, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:53:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-09-30 23:53:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2018-09-30 23:53:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 23:53:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-09-30 23:53:14,154 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 216 [2018-09-30 23:53:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:14,154 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-09-30 23:53:14,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:53:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-09-30 23:53:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-30 23:53:14,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:14,156 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-09-30 23:53:14,156 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:14,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash 292238844, now seen corresponding path program 51 times [2018-09-30 23:53:14,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:14,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:14,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:14,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:14,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 30 proven. 3226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:16,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:16,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:16,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:16,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-30 23:53:16,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:16,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 1800 proven. 1456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:22,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:22,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 130 [2018-09-30 23:53:22,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:53:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:53:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=15279, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:53:22,960 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 131 states. [2018-09-30 23:53:45,364 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2018-09-30 23:53:45,884 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2018-09-30 23:53:46,429 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2018-09-30 23:53:46,887 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:53:47,334 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:53:47,743 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:53:48,168 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:53:48,557 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:53:48,955 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:53:49,402 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:53:49,770 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:53:50,102 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:53:50,444 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:53:50,751 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:53:51,059 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-09-30 23:53:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:53,939 INFO L93 Difference]: Finished difference Result 591 states and 597 transitions. [2018-09-30 23:53:53,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2018-09-30 23:53:53,939 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 219 [2018-09-30 23:53:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:53,940 INFO L225 Difference]: With dead ends: 591 [2018-09-30 23:53:53,940 INFO L226 Difference]: Without dead ends: 344 [2018-09-30 23:53:53,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22519 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=6219, Invalid=93953, Unknown=0, NotChecked=0, Total=100172 [2018-09-30 23:53:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2018-09-30 23:53:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 227. [2018-09-30 23:53:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:53:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-30 23:53:53,997 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 219 [2018-09-30 23:53:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:53,998 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-30 23:53:53,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:53:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-30 23:53:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:53:53,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:53,999 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-09-30 23:53:53,999 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:53,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:53,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2116008107, now seen corresponding path program 52 times [2018-09-30 23:53:53,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:53,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:54,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:54,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:54,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 31 proven. 3442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:56,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:56,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:56,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:56,817 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:56,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:56,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 31 proven. 3442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:59,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:59,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 100 [2018-09-30 23:53:59,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:53:59,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:53:59,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=9834, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:53:59,493 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 101 states. [2018-09-30 23:54:11,561 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2018-09-30 23:54:12,098 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2018-09-30 23:54:12,602 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2018-09-30 23:54:12,947 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:54:13,282 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:54:13,627 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:54:13,949 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:54:14,272 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:54:14,582 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:54:14,933 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:54:15,231 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:54:15,516 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:54:15,787 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:54:16,048 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:54:16,306 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:54:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:19,005 INFO L93 Difference]: Finished difference Result 484 states and 489 transitions. [2018-09-30 23:54:19,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:54:19,006 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 226 [2018-09-30 23:54:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:19,007 INFO L225 Difference]: With dead ends: 484 [2018-09-30 23:54:19,007 INFO L226 Difference]: Without dead ends: 358 [2018-09-30 23:54:19,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1579, Invalid=25481, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:54:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-09-30 23:54:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 231. [2018-09-30 23:54:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:54:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-30 23:54:19,063 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 226 [2018-09-30 23:54:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:19,063 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-30 23:54:19,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:54:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-30 23:54:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:54:19,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:19,065 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1] [2018-09-30 23:54:19,065 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:19,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash -237256110, now seen corresponding path program 53 times [2018-09-30 23:54:19,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:19,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:19,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:19,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:19,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 2080 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:20,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:20,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:20,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:20,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-09-30 23:54:20,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:20,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 2080 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:22,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:22,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-30 23:54:22,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:54:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:54:22,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:54:22,651 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 101 states. [2018-09-30 23:54:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:24,249 INFO L93 Difference]: Finished difference Result 495 states and 499 transitions. [2018-09-30 23:54:24,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:54:24,250 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 230 [2018-09-30 23:54:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:24,251 INFO L225 Difference]: With dead ends: 495 [2018-09-30 23:54:24,251 INFO L226 Difference]: Without dead ends: 236 [2018-09-30 23:54:24,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4093, Invalid=13729, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:54:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-09-30 23:54:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2018-09-30 23:54:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-09-30 23:54:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2018-09-30 23:54:24,317 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 230 [2018-09-30 23:54:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:24,317 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2018-09-30 23:54:24,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:54:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2018-09-30 23:54:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-30 23:54:24,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:24,319 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-09-30 23:54:24,319 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:24,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash -170528822, now seen corresponding path program 54 times [2018-09-30 23:54:24,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:24,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:24,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:24,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:24,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3697 backedges. 32 proven. 3665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:27,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:27,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:27,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:27,325 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:54:27,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:27,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3697 backedges. 32 proven. 3665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:30,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:30,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 103 [2018-09-30 23:54:30,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:54:30,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:54:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=10438, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:54:30,447 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand 104 states. [2018-09-30 23:54:39,988 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-30 23:54:41,863 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2018-09-30 23:54:42,411 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2018-09-30 23:54:42,928 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2018-09-30 23:54:43,306 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2018-09-30 23:54:43,668 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:54:44,017 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:54:44,364 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:54:44,697 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:54:45,027 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:54:45,337 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:54:45,710 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:54:46,010 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:54:46,305 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:54:46,582 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:54:46,840 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:54:47,089 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:54:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:49,873 INFO L93 Difference]: Finished difference Result 499 states and 504 transitions. [2018-09-30 23:54:49,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:54:49,873 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 233 [2018-09-30 23:54:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:49,875 INFO L225 Difference]: With dead ends: 499 [2018-09-30 23:54:49,875 INFO L226 Difference]: Without dead ends: 369 [2018-09-30 23:54:49,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4493 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1661, Invalid=27069, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:54:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2018-09-30 23:54:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 238. [2018-09-30 23:54:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-09-30 23:54:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2018-09-30 23:54:49,935 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 233 [2018-09-30 23:54:49,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:49,935 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2018-09-30 23:54:49,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:54:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2018-09-30 23:54:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-30 23:54:49,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:49,936 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1] [2018-09-30 23:54:49,936 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:49,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1487711759, now seen corresponding path program 55 times [2018-09-30 23:54:49,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:49,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:49,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:49,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:49,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 2211 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:51,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:51,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:51,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:51,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 2211 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:54,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:54,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-09-30 23:54:54,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:54:54,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:54:54,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=8229, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:54:54,015 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 104 states. [2018-09-30 23:54:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:57,511 INFO L93 Difference]: Finished difference Result 510 states and 514 transitions. [2018-09-30 23:54:57,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:54:57,511 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 237 [2018-09-30 23:54:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:57,512 INFO L225 Difference]: With dead ends: 510 [2018-09-30 23:54:57,512 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:54:57,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4336, Invalid=14570, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:54:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:54:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2018-09-30 23:54:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:54:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-30 23:54:57,574 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-09-30 23:54:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:57,574 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-30 23:54:57,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:54:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-30 23:54:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 23:54:57,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:57,575 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-09-30 23:54:57,575 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:57,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1552518521, now seen corresponding path program 56 times [2018-09-30 23:54:57,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:57,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:57,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:57,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:57,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 33 proven. 3895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:00,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:00,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:00,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:00,389 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:00,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:00,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 2178 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:08,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:08,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 72] total 142 [2018-09-30 23:55:08,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 23:55:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 23:55:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2072, Invalid=18234, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:55:08,118 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 143 states. [2018-09-30 23:55:34,057 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2018-09-30 23:55:34,653 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2018-09-30 23:55:35,296 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2018-09-30 23:55:35,823 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2018-09-30 23:55:36,328 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2018-09-30 23:55:36,907 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:55:37,416 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:55:37,860 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:55:38,315 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:55:38,755 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:55:39,191 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:55:39,608 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:55:40,013 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:55:40,387 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:55:40,764 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:55:41,116 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:55:41,449 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:55:41,807 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-09-30 23:55:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:44,985 INFO L93 Difference]: Finished difference Result 648 states and 654 transitions. [2018-09-30 23:55:44,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2018-09-30 23:55:44,985 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 240 [2018-09-30 23:55:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:44,986 INFO L225 Difference]: With dead ends: 648 [2018-09-30 23:55:44,986 INFO L226 Difference]: Without dead ends: 377 [2018-09-30 23:55:44,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27043 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=7329, Invalid=112733, Unknown=0, NotChecked=0, Total=120062 [2018-09-30 23:55:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2018-09-30 23:55:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 248. [2018-09-30 23:55:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-09-30 23:55:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2018-09-30 23:55:45,054 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 240 [2018-09-30 23:55:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:45,055 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2018-09-30 23:55:45,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 23:55:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2018-09-30 23:55:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-09-30 23:55:45,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:45,056 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-09-30 23:55:45,056 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:45,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:45,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1637071768, now seen corresponding path program 57 times [2018-09-30 23:55:45,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:45,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:45,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:45,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:45,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 34 proven. 4132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:48,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:48,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:48,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:48,310 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:55:48,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:48,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 2312 proven. 1854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:55,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:55,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74] total 146 [2018-09-30 23:55:55,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 23:55:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 23:55:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2185, Invalid=19277, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:55:55,966 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand 147 states. [2018-09-30 23:56:21,568 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2018-09-30 23:56:22,171 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2018-09-30 23:56:22,852 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2018-09-30 23:56:23,412 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2018-09-30 23:56:23,950 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2018-09-30 23:56:24,489 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2018-09-30 23:56:25,001 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:56:25,493 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:56:25,954 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:56:26,428 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:56:26,877 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:56:27,299 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:56:27,734 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:56:28,203 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:56:28,582 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:56:28,952 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:56:29,303 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:56:29,654 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:56:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:33,358 INFO L93 Difference]: Finished difference Result 667 states and 673 transitions. [2018-09-30 23:56:33,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2018-09-30 23:56:33,358 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 247 [2018-09-30 23:56:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:33,360 INFO L225 Difference]: With dead ends: 667 [2018-09-30 23:56:33,360 INFO L226 Difference]: Without dead ends: 388 [2018-09-30 23:56:33,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28643 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=7719, Invalid=119373, Unknown=0, NotChecked=0, Total=127092 [2018-09-30 23:56:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-09-30 23:56:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 255. [2018-09-30 23:56:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:56:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-09-30 23:56:33,432 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 247 [2018-09-30 23:56:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:33,432 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-09-30 23:56:33,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 23:56:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-09-30 23:56:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:56:33,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:33,433 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-09-30 23:56:33,434 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:33,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:33,434 INFO L82 PathProgramCache]: Analyzing trace with hash -783420345, now seen corresponding path program 58 times [2018-09-30 23:56:33,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:33,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:33,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:33,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:33,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4411 backedges. 35 proven. 4376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:36,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:36,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:36,502 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:36,549 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:36,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:36,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4411 backedges. 35 proven. 4376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:40,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:40,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 112 [2018-09-30 23:56:40,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:56:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:56:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=12358, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:56:40,123 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 113 states. [2018-09-30 23:56:55,717 WARN L178 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2018-09-30 23:56:56,303 WARN L178 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2018-09-30 23:56:56,881 WARN L178 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2018-09-30 23:56:57,300 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2018-09-30 23:56:57,723 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2018-09-30 23:56:58,155 WARN L178 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2018-09-30 23:56:58,582 WARN L178 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2018-09-30 23:56:58,981 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:56:59,356 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:56:59,721 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:57:00,081 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:57:00,421 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:57:00,762 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:57:01,093 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:57:01,415 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:57:01,726 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:57:02,021 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:57:02,308 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:57:02,629 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:57:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:05,739 INFO L93 Difference]: Finished difference Result 544 states and 549 transitions. [2018-09-30 23:57:05,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 23:57:05,739 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 254 [2018-09-30 23:57:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:05,741 INFO L225 Difference]: With dead ends: 544 [2018-09-30 23:57:05,741 INFO L226 Difference]: Without dead ends: 402 [2018-09-30 23:57:05,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5333 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=1919, Invalid=32121, Unknown=0, NotChecked=0, Total=34040 [2018-09-30 23:57:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2018-09-30 23:57:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 259. [2018-09-30 23:57:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:57:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2018-09-30 23:57:05,812 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 254 [2018-09-30 23:57:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:05,812 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2018-09-30 23:57:05,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:57:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2018-09-30 23:57:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:57:05,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:05,813 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1] [2018-09-30 23:57:05,813 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:05,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:05,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1175113710, now seen corresponding path program 59 times [2018-09-30 23:57:05,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:05,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:05,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:05,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 2628 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:07,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:07,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:07,660 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:07,730 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:57:07,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:07,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 2628 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:10,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-30 23:57:10,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:57:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:57:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:57:10,207 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 113 states. [2018-09-30 23:57:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:14,289 INFO L93 Difference]: Finished difference Result 555 states and 559 transitions. [2018-09-30 23:57:14,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:57:14,289 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 258 [2018-09-30 23:57:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:14,290 INFO L225 Difference]: With dead ends: 555 [2018-09-30 23:57:14,290 INFO L226 Difference]: Without dead ends: 264 [2018-09-30 23:57:14,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5107, Invalid=17243, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:57:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-09-30 23:57:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2018-09-30 23:57:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-09-30 23:57:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2018-09-30 23:57:14,362 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 258 [2018-09-30 23:57:14,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:14,362 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2018-09-30 23:57:14,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:57:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2018-09-30 23:57:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-09-30 23:57:14,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:14,363 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-09-30 23:57:14,363 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:14,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1470273894, now seen corresponding path program 60 times [2018-09-30 23:57:14,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:14,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:14,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:14,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 36 proven. 4627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:17,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:17,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:17,467 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:17,558 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 23:57:17,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:17,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 2592 proven. 2071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:26,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:26,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 78] total 154 [2018-09-30 23:57:26,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 23:57:26,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 23:57:26,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=21450, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:57:26,329 INFO L87 Difference]: Start difference. First operand 262 states and 264 transitions. Second operand 155 states. [2018-09-30 23:57:56,934 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2018-09-30 23:57:57,608 WARN L178 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2018-09-30 23:57:58,325 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2018-09-30 23:57:58,934 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2018-09-30 23:57:59,521 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2018-09-30 23:58:00,154 WARN L178 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2018-09-30 23:58:00,745 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2018-09-30 23:58:01,282 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2018-09-30 23:58:01,813 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:58:02,340 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:58:02,829 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:58:03,317 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:58:03,796 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:58:04,254 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:58:04,692 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:58:05,153 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:58:05,597 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:58:05,991 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:58:06,365 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:58:06,713 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:58:07,691 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-09-30 23:58:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:10,554 INFO L93 Difference]: Finished difference Result 705 states and 711 transitions. [2018-09-30 23:58:10,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2018-09-30 23:58:10,554 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 261 [2018-09-30 23:58:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:10,556 INFO L225 Difference]: With dead ends: 705 [2018-09-30 23:58:10,556 INFO L226 Difference]: Without dead ends: 410 [2018-09-30 23:58:10,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31981 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=8529, Invalid=133223, Unknown=0, NotChecked=0, Total=141752 [2018-09-30 23:58:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2018-09-30 23:58:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 269. [2018-09-30 23:58:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 23:58:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2018-09-30 23:58:10,633 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 261 [2018-09-30 23:58:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:10,634 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2018-09-30 23:58:10,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 23:58:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2018-09-30 23:58:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 23:58:10,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:10,635 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-09-30 23:58:10,635 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:10,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:10,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1569385749, now seen corresponding path program 61 times [2018-09-30 23:58:10,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:10,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:10,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:10,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:10,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 37 proven. 4885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:13,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:13,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:13,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:13,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 37 proven. 4885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:17,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:17,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 118 [2018-09-30 23:58:17,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:58:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:58:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=13728, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:58:17,847 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand 119 states. [2018-09-30 23:58:34,960 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2018-09-30 23:58:35,608 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2018-09-30 23:58:36,307 WARN L178 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2018-09-30 23:58:36,789 WARN L178 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2018-09-30 23:58:37,247 WARN L178 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2018-09-30 23:58:37,692 WARN L178 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2018-09-30 23:58:38,133 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2018-09-30 23:58:38,569 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2018-09-30 23:58:38,977 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2018-09-30 23:58:39,385 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:58:39,774 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:58:40,151 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:58:40,517 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:58:40,915 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:58:41,338 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:58:41,705 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:58:42,047 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:58:42,366 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:58:42,683 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:58:42,988 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:58:43,273 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:58:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:46,553 INFO L93 Difference]: Finished difference Result 574 states and 579 transitions. [2018-09-30 23:58:46,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:58:46,553 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 268 [2018-09-30 23:58:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:46,555 INFO L225 Difference]: With dead ends: 574 [2018-09-30 23:58:46,555 INFO L226 Difference]: Without dead ends: 424 [2018-09-30 23:58:46,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5933 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=2101, Invalid=35729, Unknown=0, NotChecked=0, Total=37830 [2018-09-30 23:58:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2018-09-30 23:58:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 273. [2018-09-30 23:58:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 23:58:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2018-09-30 23:58:46,674 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 268 [2018-09-30 23:58:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,674 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2018-09-30 23:58:46,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:58:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2018-09-30 23:58:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:58:46,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,676 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1] [2018-09-30 23:58:46,676 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash 107131324, now seen corresponding path program 62 times [2018-09-30 23:58:46,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 2926 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:48,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:48,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:48,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:48,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 2926 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:51,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:51,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 118 [2018-09-30 23:58:51,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:58:51,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:58:51,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3238, Invalid=10804, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:58:51,199 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand 119 states. [2018-09-30 23:58:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:54,627 INFO L93 Difference]: Finished difference Result 585 states and 589 transitions. [2018-09-30 23:58:54,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:58:54,628 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 272 [2018-09-30 23:58:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:54,629 INFO L225 Difference]: With dead ends: 585 [2018-09-30 23:58:54,630 INFO L226 Difference]: Without dead ends: 278 [2018-09-30 23:58:54,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5656, Invalid=19150, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:58:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-09-30 23:58:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2018-09-30 23:58:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-09-30 23:58:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2018-09-30 23:58:54,710 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 272 [2018-09-30 23:58:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:54,710 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2018-09-30 23:58:54,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:58:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2018-09-30 23:58:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-09-30 23:58:54,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:54,712 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-09-30 23:58:54,712 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:54,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1761642804, now seen corresponding path program 63 times [2018-09-30 23:58:54,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:54,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:54,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:54,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5188 backedges. 38 proven. 5150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:58,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:58,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:58,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:58,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:58:58,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:58,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5188 backedges. 2888 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:08,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:08,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 82] total 162 [2018-09-30 23:59:08,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-09-30 23:59:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-09-30 23:59:08,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2667, Invalid=23739, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:59:08,323 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 163 states. [2018-09-30 23:59:42,349 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2018-09-30 23:59:43,154 WARN L178 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2018-09-30 23:59:43,978 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2018-09-30 23:59:44,679 WARN L178 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2018-09-30 23:59:45,320 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2018-09-30 23:59:45,940 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2018-09-30 23:59:46,568 WARN L178 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2018-09-30 23:59:47,167 WARN L178 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2018-09-30 23:59:47,832 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2018-09-30 23:59:48,387 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2018-09-30 23:59:48,957 WARN L178 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-09-30 23:59:49,473 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-09-30 23:59:49,970 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-09-30 23:59:50,472 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-09-30 23:59:50,946 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-09-30 23:59:51,414 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2018-09-30 23:59:51,860 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 23:59:52,291 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 23:59:52,769 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 23:59:53,197 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 23:59:53,574 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 23:59:53,957 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 23:59:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:57,834 INFO L93 Difference]: Finished difference Result 743 states and 749 transitions. [2018-09-30 23:59:57,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2018-09-30 23:59:57,834 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 275 [2018-09-30 23:59:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:57,835 INFO L225 Difference]: With dead ends: 743 [2018-09-30 23:59:57,835 INFO L226 Difference]: Without dead ends: 432 [2018-09-30 23:59:57,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35503 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=9379, Invalid=147833, Unknown=0, NotChecked=0, Total=157212 [2018-09-30 23:59:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2018-09-30 23:59:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 283. [2018-09-30 23:59:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 23:59:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2018-09-30 23:59:57,949 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 275 [2018-09-30 23:59:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:57,949 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2018-09-30 23:59:57,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-09-30 23:59:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2018-09-30 23:59:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 23:59:57,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:57,950 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-09-30 23:59:57,951 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:57,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:57,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1738639389, now seen corresponding path program 64 times [2018-09-30 23:59:57,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:57,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:57,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:57,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:57,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5461 backedges. 39 proven. 5422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:01,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:01,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:01,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:01,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:01,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:01,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5461 backedges. 39 proven. 5422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:06,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:06,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82] total 124 [2018-10-01 00:00:06,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-01 00:00:06,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-01 00:00:06,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=15170, Unknown=0, NotChecked=0, Total=15500 [2018-10-01 00:00:06,023 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand 125 states. Received shutdown request... [2018-10-01 00:00:12,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:00:12,195 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:00:12,201 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:00:12,201 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:00:12 BoogieIcfgContainer [2018-10-01 00:00:12,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:00:12,202 INFO L168 Benchmark]: Toolchain (without parser) took 781188.48 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -217.6 MB). Free memory was 1.5 GB in the beginning and 792.9 MB in the end (delta: 669.6 MB). Peak memory consumption was 452.0 MB. Max. memory is 7.1 GB. [2018-10-01 00:00:12,203 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:00:12,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:00:12,203 INFO L168 Benchmark]: Boogie Preprocessor took 21.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:00:12,204 INFO L168 Benchmark]: RCFGBuilder took 354.19 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:00:12,204 INFO L168 Benchmark]: TraceAbstraction took 780765.48 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -217.6 MB). Free memory was 1.4 GB in the beginning and 792.9 MB in the end (delta: 648.5 MB). Peak memory consumption was 430.9 MB. Max. memory is 7.1 GB. [2018-10-01 00:00:12,205 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 354.19 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 780765.48 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -217.6 MB). Free memory was 1.4 GB in the beginning and 792.9 MB in the end (delta: 648.5 MB). Peak memory consumption was 430.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (283states) and FLOYD_HOARE automaton (currently 34 states, 125 states before enhancement), while ReachableStatesComputation was computing reachable states (95 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 780.6s OverallTime, 68 OverallIterations, 40 TraceHistogramMax, 554.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1600 SDtfs, 9129 SDslu, 65590 SDs, 0 SdLazy, 345791 SolverSat, 3713 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 189.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15337 GetRequests, 7617 SyntacticMatches, 26 SemanticMatches, 7694 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292719 ImplicationChecksByTransitivity, 526.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=283occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 67 MinimizatonAttempts, 3058 StatesRemovedByMinimization, 67 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 216.0s InterpolantComputationTime, 18684 NumberOfCodeBlocks, 18445 NumberOfCodeBlocksAsserted, 777 NumberOfCheckSat, 18551 ConstructedInterpolants, 0 QuantifiedInterpolants, 27280640 SizeOfPredicates, 209 NumberOfNonLiveVariables, 13311 ConjunctsInSsa, 3902 ConjunctsInUnsatCore, 133 InterpolantComputations, 3 PerfectInterpolantSequences, 66340/234488 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-00-12-213.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-00-12-213.csv Completed graceful shutdown