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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:32:40,851 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:32:40,853 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:32:40,864 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 14:32:40,894 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:32:40,909 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:32:40,909 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:32:40,910 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:32:40,910 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:32:40,911 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:32:40,911 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:32:40,911 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:32:40,912 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:32:40,912 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:32:40,912 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:32:40,912 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:32:40,912 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:32:40,913 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:32:40,913 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:32:40,913 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:32:40,913 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:32:40,913 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:32:40,913 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:32:40,914 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:32:40,914 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:32:40,914 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:32:40,914 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:32:40,914 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:32:40,915 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:32:40,915 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:32:40,915 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:32:40,915 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:32:40,915 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:32:40,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:32:40,916 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:32:40,916 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:32:40,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:32:40,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:32:40,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:32:40,985 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:32:40,986 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:32:40,987 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl [2018-10-04 14:32:40,987 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl' [2018-10-04 14:32:41,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:32:41,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:32:41,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:32:41,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:32:41,066 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:32:41,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:32:41,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:32:41,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:32:41,110 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:32:41,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... [2018-10-04 14:32:41,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:32:41,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:32:41,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:32:41,136 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:32:41,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:32:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:32:41,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:32:41,442 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:32:41,443 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:32:41 BoogieIcfgContainer [2018-10-04 14:32:41,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:32:41,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:32:41,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:32:41,451 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:32:41,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:41" (1/2) ... [2018-10-04 14:32:41,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52456914 and model type seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:32:41, skipping insertion in model container [2018-10-04 14:32:41,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:32:41" (2/2) ... [2018-10-04 14:32:41,455 INFO L112 eAbstractionObserver]: Analyzing ICFG seq.i_4.bpl [2018-10-04 14:32:41,465 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:32:41,476 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:32:41,521 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:32:41,522 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:32:41,522 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:32:41,522 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:32:41,523 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:32:41,523 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:32:41,523 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:32:41,523 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:32:41,523 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:32:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 14:32:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:32:41,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:41,554 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 14:32:41,555 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:41,560 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-04 14:32:41,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:41,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:41,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:41,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:41,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:41,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:32:41,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:32:41,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:32:41,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:32:41,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:41,868 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-04 14:32:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:41,983 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-04 14:32:41,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:32:41,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 14:32:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:42,011 INFO L225 Difference]: With dead ends: 16 [2018-10-04 14:32:42,011 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:32:42,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-04 14:32:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:32:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:32:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:32:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 14:32:42,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-04 14:32:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:42,049 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 14:32:42,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:32:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 14:32:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:32:42,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:42,050 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:32:42,050 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:42,051 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-10-04 14:32:42,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:42,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:42,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:42,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:42,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:42,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:32:42,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 14:32:42,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:32:42,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:32:42,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:42,149 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 14:32:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:42,262 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 14:32:42,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:32:42,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 14:32:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:42,263 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:32:42,264 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:32:42,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 4 [2018-10-04 14:32:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:32:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-04 14:32:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:32:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 14:32:42,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 14:32:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:42,270 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 14:32:42,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:32:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 14:32:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:32:42,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:42,271 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:32:42,271 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:42,271 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:42,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-04 14:32:42,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:42,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:42,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:42,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:42,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:42,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:42,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:42,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:42,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:43,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:43,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-04 14:32:43,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:32:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:32:43,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:43,027 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2018-10-04 14:32:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:43,358 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 14:32:43,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:32:43,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 14:32:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:43,361 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:32:43,361 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:32:43,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 7 [2018-10-04 14:32:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:32:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:32:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:32:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 14:32:43,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-04 14:32:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:43,368 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 14:32:43,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:32:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 14:32:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:32:43,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:43,370 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 14:32:43,370 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:43,370 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-10-04 14:32:43,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:43,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:43,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:43,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:43,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:43,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:43,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:43,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:32:43,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:32:43,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:43,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:43,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:43,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-04 14:32:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:32:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:32:43,753 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:43,754 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-04 14:32:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:43,945 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 14:32:43,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:32:43,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-04 14:32:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:43,947 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:32:43,947 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:32:43,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 14:32:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:32:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-04 14:32:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:32:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 14:32:43,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-04 14:32:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:43,953 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 14:32:43,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:32:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 14:32:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:32:43,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:43,954 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-04 14:32:43,954 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:43,954 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:43,954 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-10-04 14:32:43,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:43,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:43,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:43,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:43,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:44,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:44,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:44,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:32:44,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 14:32:44,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:44,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:44,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:44,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-04 14:32:44,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:32:44,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:32:44,595 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:44,596 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-10-04 14:32:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:44,785 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 14:32:44,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:32:44,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 14:32:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:44,787 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:32:44,787 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:32:44,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 7 [2018-10-04 14:32:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:32:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:32:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:32:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 14:32:44,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-04 14:32:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:44,792 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 14:32:44,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:32:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 14:32:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:32:44,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:44,793 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-04 14:32:44,793 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:44,793 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:44,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-10-04 14:32:44,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:44,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:44,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:44,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:45,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:45,036 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:32:45,077 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:32:45,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:45,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:45,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-04 14:32:45,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:32:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:32:45,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:45,166 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 14:32:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:45,264 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 14:32:45,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:32:45,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 14:32:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:45,266 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:32:45,266 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:32:45,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 14:32:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:32:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 14:32:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:32:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 14:32:45,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-04 14:32:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:45,273 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 14:32:45,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:32:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 14:32:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:32:45,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:45,274 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-04 14:32:45,274 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:45,276 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:45,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-10-04 14:32:45,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:45,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:45,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:45,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:45,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:45,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:32:45,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 14:32:45,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:45,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:45,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-04 14:32:45,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:32:45,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:32:45,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:45,644 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-10-04 14:32:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:45,867 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 14:32:45,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:32:45,867 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 14:32:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:45,869 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:32:45,869 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:32:45,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 8 [2018-10-04 14:32:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:32:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:32:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:32:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 14:32:45,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-04 14:32:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:45,874 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 14:32:45,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:32:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 14:32:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:32:45,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:45,876 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-04 14:32:45,876 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:45,876 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:45,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-10-04 14:32:45,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:45,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:45,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:45,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:46,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:46,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:46,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:32:46,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 14:32:46,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:46,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:46,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:46,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-04 14:32:46,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:32:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:32:46,148 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:46,148 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-04 14:32:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:46,252 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 14:32:46,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:32:46,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-04 14:32:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:46,254 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:32:46,254 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:32:46,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 11 [2018-10-04 14:32:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:32:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-04 14:32:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:32:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 14:32:46,260 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-04 14:32:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:46,260 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 14:32:46,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:32:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 14:32:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:32:46,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:46,262 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-04 14:32:46,262 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:46,262 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:46,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-10-04 14:32:46,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:46,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:46,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:46,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:46,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:46,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:46,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:46,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:46,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:46,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:46,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-04 14:32:46,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:32:46,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:32:46,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:46,796 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-10-04 14:32:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:47,153 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 14:32:47,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:32:47,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 14:32:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:47,154 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:32:47,155 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:32:47,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 9 [2018-10-04 14:32:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:32:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:32:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:32:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 14:32:47,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-04 14:32:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:47,161 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 14:32:47,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:32:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 14:32:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:32:47,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:47,162 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-04 14:32:47,162 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:47,163 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-10-04 14:32:47,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:47,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:47,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:47,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:47,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:47,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:47,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:32:47,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:32:47,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:47,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:47,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:47,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-04 14:32:47,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:32:47,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:32:47,581 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:47,581 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-04 14:32:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:47,770 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 14:32:47,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:32:47,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-04 14:32:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:47,771 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:32:47,771 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:32:47,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 13 [2018-10-04 14:32:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:32:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-04 14:32:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:32:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 14:32:47,777 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-04 14:32:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:47,778 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 14:32:47,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:32:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 14:32:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:32:47,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:47,779 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-04 14:32:47,779 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:47,780 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-10-04 14:32:47,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:47,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:47,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:47,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:48,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:48,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:48,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:32:48,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 14:32:48,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:48,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:48,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:48,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-04 14:32:48,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:32:48,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:32:48,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:48,718 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 26 states. [2018-10-04 14:32:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:48,948 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 14:32:48,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:32:48,948 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 14:32:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:48,949 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:32:48,949 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:32:48,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 13 [2018-10-04 14:32:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:32:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:32:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:32:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 14:32:48,956 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-04 14:32:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:48,956 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 14:32:48,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:32:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 14:32:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:32:48,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:48,957 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-04 14:32:48,958 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:48,974 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-10-04 14:32:48,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:48,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:48,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:48,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:48,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:49,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:49,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:49,232 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:32:49,256 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:32:49,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:49,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:49,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:49,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-04 14:32:49,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:32:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:32:49,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:49,453 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-04 14:32:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:49,654 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 14:32:49,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:32:49,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-04 14:32:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:49,656 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:32:49,656 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:32:49,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 15 [2018-10-04 14:32:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:32:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-04 14:32:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:32:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 14:32:49,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-04 14:32:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:49,665 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 14:32:49,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:32:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 14:32:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:32:49,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:49,667 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-04 14:32:49,667 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:49,667 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:49,667 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-10-04 14:32:49,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:49,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:49,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:49,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:49,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:50,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:50,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:50,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:32:50,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:32:50,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:50,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:50,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:50,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-04 14:32:50,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:32:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:32:50,400 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:50,400 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 30 states. [2018-10-04 14:32:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:51,567 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 14:32:51,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:32:51,567 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 14:32:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:51,568 INFO L225 Difference]: With dead ends: 50 [2018-10-04 14:32:51,568 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:32:51,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 11 [2018-10-04 14:32:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:32:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:32:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:32:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 14:32:51,576 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-04 14:32:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:51,576 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 14:32:51,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:32:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 14:32:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:32:51,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:51,577 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-04 14:32:51,578 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:51,578 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:51,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-10-04 14:32:51,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:51,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:51,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:51,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:51,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:51,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:51,869 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:51,878 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:32:51,921 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 14:32:51,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:51,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:52,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:52,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-04 14:32:52,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:32:52,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:32:52,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:52,027 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-04 14:32:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:52,387 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 14:32:52,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:32:52,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-04 14:32:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:52,388 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:32:52,388 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:32:52,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 17 [2018-10-04 14:32:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:32:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-04 14:32:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:32:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 14:32:52,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-04 14:32:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:52,395 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 14:32:52,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:32:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 14:32:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:32:52,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:52,395 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-04 14:32:52,396 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:52,396 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-10-04 14:32:52,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:52,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:52,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:52,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:52,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:52,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:52,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:52,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:52,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:52,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:52,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-04 14:32:52,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:32:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:32:52,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:52,956 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 34 states. [2018-10-04 14:32:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:53,401 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 14:32:53,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:32:53,401 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 14:32:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:53,402 INFO L225 Difference]: With dead ends: 56 [2018-10-04 14:32:53,402 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:32:53,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 17 [2018-10-04 14:32:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:32:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:32:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:32:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 14:32:53,409 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-04 14:32:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:53,410 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 14:32:53,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:32:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 14:32:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:32:53,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:53,411 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-04 14:32:53,411 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:53,411 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-10-04 14:32:53,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:53,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:53,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:53,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:53,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:53,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:53,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:53,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:32:53,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:32:53,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:53,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:53,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:53,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-04 14:32:53,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:32:53,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:32:53,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:53,735 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-04 14:32:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:54,356 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 14:32:54,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:32:54,358 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-04 14:32:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:54,358 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:32:54,359 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:32:54,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 19 [2018-10-04 14:32:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:32:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-04 14:32:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:32:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 14:32:54,373 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-04 14:32:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:54,374 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 14:32:54,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:32:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 14:32:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:32:54,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:54,375 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-04 14:32:54,378 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:54,378 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-10-04 14:32:54,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:54,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:54,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:54,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:54,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:54,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:54,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:54,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:32:54,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 14:32:54,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:54,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:54,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:54,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-04 14:32:54,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:32:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:32:54,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:54,983 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 38 states. [2018-10-04 14:32:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:55,341 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 14:32:55,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:32:55,342 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 14:32:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:55,342 INFO L225 Difference]: With dead ends: 62 [2018-10-04 14:32:55,342 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:32:55,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 13 [2018-10-04 14:32:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:32:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:32:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:32:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 14:32:55,350 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-04 14:32:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:55,350 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 14:32:55,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:32:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 14:32:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:32:55,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:55,351 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-04 14:32:55,352 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:55,352 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-10-04 14:32:55,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:55,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:55,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:55,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:55,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:55,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:55,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:55,804 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:32:55,832 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:32:55,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:55,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:55,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:55,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-04 14:32:55,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:32:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:32:55,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:55,955 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-04 14:32:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:56,163 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 14:32:56,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:32:56,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-04 14:32:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:56,165 INFO L225 Difference]: With dead ends: 49 [2018-10-04 14:32:56,165 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:32:56,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 21 [2018-10-04 14:32:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:32:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-04 14:32:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:32:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 14:32:56,175 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-04 14:32:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:56,175 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 14:32:56,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:32:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 14:32:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:32:56,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:56,176 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-04 14:32:56,177 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:56,177 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-10-04 14:32:56,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:56,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:56,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:56,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:56,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:57,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:57,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:57,661 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:32:57,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:32:57,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:57,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:58,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:58,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-04 14:32:58,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:32:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:32:58,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:58,089 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 42 states. [2018-10-04 14:32:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:58,632 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 14:32:58,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:32:58,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 14:32:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:58,633 INFO L225 Difference]: With dead ends: 68 [2018-10-04 14:32:58,633 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 14:32:58,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 21 [2018-10-04 14:32:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 14:32:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 14:32:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:32:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 14:32:58,641 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-04 14:32:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:58,641 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 14:32:58,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:32:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 14:32:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:32:58,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:58,642 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-04 14:32:58,642 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:58,643 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:58,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-10-04 14:32:58,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:58,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:58,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:58,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:58,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:58,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:58,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:58,834 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:32:58,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 14:32:58,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:58,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:59,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:59,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-04 14:32:59,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:32:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:32:59,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:59,010 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-04 14:32:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:59,228 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 14:32:59,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:32:59,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 14:32:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:59,229 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:32:59,229 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 14:32:59,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 23 [2018-10-04 14:32:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 14:32:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-04 14:32:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 14:32:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 14:32:59,237 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-04 14:32:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:59,237 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 14:32:59,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:32:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 14:32:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 14:32:59,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:59,238 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-04 14:32:59,239 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:59,239 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-10-04 14:32:59,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:59,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:59,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:59,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:59,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:59,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:59,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:59,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:59,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:59,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:59,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-04 14:32:59,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:32:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:32:59,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:59,989 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 46 states. [2018-10-04 14:33:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:00,473 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 14:33:00,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:33:00,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 14:33:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:00,474 INFO L225 Difference]: With dead ends: 74 [2018-10-04 14:33:00,474 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 14:33:00,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 15 [2018-10-04 14:33:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 14:33:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 14:33:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:33:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 14:33:00,482 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-04 14:33:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:00,482 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 14:33:00,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:33:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 14:33:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:33:00,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:00,483 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-04 14:33:00,483 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:00,483 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:00,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-10-04 14:33:00,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:00,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:00,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:00,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:00,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:00,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:00,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:00,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:00,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:00,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:00,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:00,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:00,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-04 14:33:00,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:33:00,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:33:00,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:00,854 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-04 14:33:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:01,083 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 14:33:01,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:33:01,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-04 14:33:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:01,088 INFO L225 Difference]: With dead ends: 57 [2018-10-04 14:33:01,088 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 14:33:01,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 25 [2018-10-04 14:33:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 14:33:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-04 14:33:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 14:33:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 14:33:01,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-04 14:33:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:01,098 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 14:33:01,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:33:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 14:33:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:33:01,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:01,099 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-04 14:33:01,099 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:01,099 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-10-04 14:33:01,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:01,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:01,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:02,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:02,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:02,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:02,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:33:02,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:02,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:02,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:02,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-04 14:33:02,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:33:02,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:33:02,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:02,510 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 50 states. [2018-10-04 14:33:03,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:03,224 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 14:33:03,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:33:03,224 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 14:33:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:03,225 INFO L225 Difference]: With dead ends: 80 [2018-10-04 14:33:03,225 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:33:03,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 16 [2018-10-04 14:33:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:33:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 14:33:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:33:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 14:33:03,233 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-04 14:33:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:03,234 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 14:33:03,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:33:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 14:33:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:33:03,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:03,235 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-04 14:33:03,235 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:03,235 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:03,235 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-10-04 14:33:03,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:03,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:03,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:03,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:03,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:03,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:03,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:03,510 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:03,541 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:03,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:03,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:03,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:03,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-04 14:33:03,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:33:03,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:33:03,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:03,657 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-04 14:33:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:03,986 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 14:33:03,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:33:03,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-04 14:33:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:03,986 INFO L225 Difference]: With dead ends: 61 [2018-10-04 14:33:03,987 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:33:03,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 27 [2018-10-04 14:33:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:33:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-04 14:33:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 14:33:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 14:33:03,994 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-04 14:33:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:03,995 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 14:33:03,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:33:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 14:33:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 14:33:03,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:03,996 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-04 14:33:03,996 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:03,996 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-10-04 14:33:03,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:03,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:03,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:03,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:03,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:04,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:04,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:04,585 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:04,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:33:04,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:04,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:05,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:05,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-04 14:33:05,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:33:05,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:33:05,187 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:05,187 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 54 states. [2018-10-04 14:33:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:05,994 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 14:33:05,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:33:05,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 14:33:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:05,995 INFO L225 Difference]: With dead ends: 86 [2018-10-04 14:33:05,995 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 14:33:05,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 17 [2018-10-04 14:33:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 14:33:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 14:33:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 14:33:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 14:33:06,001 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-04 14:33:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:06,002 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 14:33:06,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:33:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 14:33:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:33:06,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:06,003 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-04 14:33:06,003 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:06,003 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:06,003 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-10-04 14:33:06,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:06,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:06,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:06,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:06,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:06,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:06,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:06,302 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:06,344 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 14:33:06,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:06,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:06,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:06,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-04 14:33:06,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:33:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:33:06,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:06,450 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-04 14:33:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:07,621 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 14:33:07,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:33:07,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-04 14:33:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:07,623 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:33:07,623 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 14:33:07,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 29 [2018-10-04 14:33:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 14:33:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-04 14:33:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:33:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 14:33:07,632 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-04 14:33:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:07,632 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 14:33:07,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:33:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 14:33:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:33:07,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:07,633 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-04 14:33:07,634 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:07,634 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:07,634 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-10-04 14:33:07,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:07,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:07,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:07,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:07,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:08,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:08,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:08,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:08,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:08,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:08,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-04 14:33:08,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:33:08,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:33:08,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:08,572 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 58 states. [2018-10-04 14:33:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:10,281 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 14:33:10,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:33:10,281 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 14:33:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:10,282 INFO L225 Difference]: With dead ends: 92 [2018-10-04 14:33:10,282 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:33:10,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 29 [2018-10-04 14:33:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:33:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:33:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:33:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 14:33:10,291 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-04 14:33:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:10,291 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 14:33:10,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:33:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 14:33:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:33:10,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:10,292 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-04 14:33:10,292 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:10,292 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-10-04 14:33:10,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:10,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:10,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:10,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:10,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:10,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:10,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:10,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:10,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:10,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:10,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:10,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:10,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-04 14:33:10,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:33:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:33:10,722 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:10,722 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-04 14:33:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:11,005 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 14:33:11,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:33:11,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-04 14:33:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:11,007 INFO L225 Difference]: With dead ends: 69 [2018-10-04 14:33:11,007 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 14:33:11,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 31 [2018-10-04 14:33:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 14:33:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-04 14:33:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 14:33:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 14:33:11,017 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-04 14:33:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:11,018 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 14:33:11,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:33:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 14:33:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:33:11,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:11,019 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-04 14:33:11,019 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:11,019 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-10-04 14:33:11,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:11,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:11,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:11,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:11,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:11,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:11,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:11,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:11,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:33:11,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:11,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:12,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:12,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-04 14:33:12,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 14:33:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 14:33:12,747 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:12,747 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 62 states. [2018-10-04 14:33:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:13,644 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 14:33:13,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:33:13,644 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 14:33:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:13,645 INFO L225 Difference]: With dead ends: 98 [2018-10-04 14:33:13,645 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 14:33:13,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 31 [2018-10-04 14:33:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 14:33:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 14:33:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 14:33:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 14:33:13,655 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-04 14:33:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:13,655 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 14:33:13,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 14:33:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 14:33:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 14:33:13,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:13,656 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-04 14:33:13,657 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:13,657 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:13,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-10-04 14:33:13,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:13,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:13,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:13,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:13,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:13,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:13,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:13,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:13,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:13,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:13,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:14,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:14,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-04 14:33:14,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:33:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:33:14,114 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:14,114 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-04 14:33:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:14,398 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 14:33:14,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:33:14,399 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-04 14:33:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:14,400 INFO L225 Difference]: With dead ends: 73 [2018-10-04 14:33:14,400 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 14:33:14,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 33 [2018-10-04 14:33:14,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 14:33:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-04 14:33:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 14:33:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 14:33:14,411 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-04 14:33:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:14,411 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 14:33:14,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:33:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 14:33:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 14:33:14,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:14,412 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-04 14:33:14,412 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:14,412 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-10-04 14:33:14,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:14,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:14,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:14,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:14,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:15,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:15,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:15,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:15,558 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 14:33:15,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:15,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:16,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:16,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-04 14:33:16,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 14:33:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 14:33:16,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:16,200 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 66 states. [2018-10-04 14:33:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:17,187 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 14:33:17,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:33:17,188 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 14:33:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:17,188 INFO L225 Difference]: With dead ends: 104 [2018-10-04 14:33:17,188 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 14:33:17,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.5s impTime 33 [2018-10-04 14:33:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 14:33:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 14:33:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 14:33:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 14:33:17,196 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-04 14:33:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:17,196 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 14:33:17,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 14:33:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 14:33:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:33:17,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:17,197 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-04 14:33:17,197 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:17,197 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:17,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-10-04 14:33:17,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:17,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:17,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:17,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:17,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:17,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:17,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:17,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:17,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 14:33:17,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:17,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:18,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:18,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-04 14:33:18,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:33:18,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:33:18,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:18,260 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-04 14:33:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:18,561 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 14:33:18,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:33:18,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-04 14:33:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:18,563 INFO L225 Difference]: With dead ends: 77 [2018-10-04 14:33:18,563 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 14:33:18,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 35 [2018-10-04 14:33:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 14:33:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-04 14:33:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 14:33:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 14:33:18,576 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-04 14:33:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:18,576 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 14:33:18,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:33:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 14:33:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 14:33:18,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:18,577 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-04 14:33:18,577 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:18,577 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-10-04 14:33:18,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:18,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:18,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:18,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:18,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:19,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:19,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:19,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:19,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:19,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:19,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-04 14:33:19,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 14:33:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 14:33:19,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:19,823 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 70 states. [2018-10-04 14:33:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:21,018 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 14:33:21,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:33:21,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-04 14:33:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:21,018 INFO L225 Difference]: With dead ends: 110 [2018-10-04 14:33:21,018 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 14:33:21,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 35 [2018-10-04 14:33:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 14:33:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 14:33:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 14:33:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 14:33:21,030 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-04 14:33:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:21,030 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 14:33:21,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 14:33:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 14:33:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 14:33:21,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:21,031 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-04 14:33:21,031 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:21,031 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:21,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-10-04 14:33:21,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:21,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:21,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:21,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:21,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:21,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:21,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:21,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:21,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:21,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:21,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:21,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:21,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-04 14:33:21,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:33:21,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:33:21,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:21,704 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-04 14:33:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:22,064 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 14:33:22,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:33:22,064 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-04 14:33:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:22,065 INFO L225 Difference]: With dead ends: 81 [2018-10-04 14:33:22,065 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 14:33:22,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 37 [2018-10-04 14:33:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 14:33:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-04 14:33:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 14:33:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 14:33:22,077 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-04 14:33:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:22,077 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 14:33:22,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:33:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 14:33:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:33:22,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:22,078 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-04 14:33:22,078 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:22,078 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-10-04 14:33:22,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:22,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:22,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:22,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:22,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:22,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:22,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:22,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:22,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 14:33:22,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:22,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:23,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:23,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-04 14:33:23,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:33:23,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:33:23,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:23,735 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 74 states. [2018-10-04 14:33:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:24,822 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 14:33:24,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:33:24,822 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-04 14:33:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:24,822 INFO L225 Difference]: With dead ends: 116 [2018-10-04 14:33:24,823 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 14:33:24,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 22 [2018-10-04 14:33:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 14:33:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 14:33:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 14:33:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 14:33:24,833 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-04 14:33:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:24,833 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 14:33:24,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:33:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 14:33:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 14:33:24,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:24,834 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-04 14:33:24,834 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:24,834 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:24,835 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-10-04 14:33:24,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:24,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:24,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:24,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:25,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:25,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:25,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:25,139 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:25,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:25,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:25,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:25,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-04 14:33:25,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:33:25,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:33:25,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:25,294 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-04 14:33:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:25,670 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 14:33:25,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:33:25,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-04 14:33:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:25,672 INFO L225 Difference]: With dead ends: 85 [2018-10-04 14:33:25,672 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:33:25,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 39 [2018-10-04 14:33:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:33:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-04 14:33:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 14:33:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 14:33:25,684 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-04 14:33:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:25,684 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 14:33:25,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:33:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 14:33:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 14:33:25,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:25,685 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-04 14:33:25,685 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:25,685 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:25,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-10-04 14:33:25,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:25,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:25,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:25,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:25,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:26,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:26,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:26,362 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:26,419 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:33:26,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:26,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:27,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:27,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-04 14:33:27,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 14:33:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 14:33:27,340 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:27,341 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 78 states. [2018-10-04 14:33:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:28,742 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 14:33:28,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:33:28,742 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-04 14:33:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:28,743 INFO L225 Difference]: With dead ends: 122 [2018-10-04 14:33:28,743 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 14:33:28,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 39 [2018-10-04 14:33:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 14:33:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 14:33:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 14:33:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 14:33:28,754 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-04 14:33:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:28,754 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 14:33:28,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 14:33:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 14:33:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 14:33:28,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:28,755 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-04 14:33:28,755 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:28,755 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-10-04 14:33:28,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:28,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:28,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:28,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:28,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:29,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:29,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:29,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:29,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 14:33:29,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:29,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:29,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:29,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-04 14:33:29,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:33:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:33:29,316 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:29,316 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-04 14:33:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:29,714 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 14:33:29,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:33:29,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-04 14:33:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:29,716 INFO L225 Difference]: With dead ends: 89 [2018-10-04 14:33:29,716 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 14:33:29,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 41 [2018-10-04 14:33:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 14:33:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-04 14:33:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 14:33:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 14:33:29,732 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-04 14:33:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:29,732 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 14:33:29,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:33:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 14:33:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 14:33:29,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:29,733 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-04 14:33:29,733 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:29,733 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-10-04 14:33:29,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:29,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:29,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:29,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:29,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:30,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:30,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:30,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:30,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:31,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:31,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-04 14:33:31,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 14:33:31,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 14:33:31,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:31,465 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 82 states. [2018-10-04 14:33:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:32,966 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 14:33:32,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:33:32,966 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-04 14:33:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:32,966 INFO L225 Difference]: With dead ends: 128 [2018-10-04 14:33:32,967 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 14:33:32,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 24 [2018-10-04 14:33:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 14:33:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 14:33:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 14:33:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 14:33:32,978 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-04 14:33:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:32,979 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 14:33:32,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 14:33:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 14:33:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 14:33:32,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:32,979 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-04 14:33:32,979 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:32,979 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-10-04 14:33:32,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:32,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:32,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:32,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:32,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:33,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:33,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:33,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:33,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:33,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:33,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:34,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:34,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-04 14:33:34,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:33:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:33:34,003 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:34,003 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-04 14:33:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:34,419 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 14:33:34,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:33:34,419 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-04 14:33:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:34,420 INFO L225 Difference]: With dead ends: 93 [2018-10-04 14:33:34,421 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 14:33:34,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 43 [2018-10-04 14:33:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 14:33:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-04 14:33:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 14:33:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 14:33:34,433 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-04 14:33:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:34,434 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 14:33:34,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:33:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 14:33:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 14:33:34,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:34,434 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-04 14:33:34,434 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:34,434 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-10-04 14:33:34,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:34,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:34,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:34,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:34,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:34,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:34,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:34,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:35,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 14:33:35,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:35,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:35,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:35,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-04 14:33:35,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 14:33:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 14:33:35,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:35,951 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 86 states. [2018-10-04 14:33:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:37,503 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 14:33:37,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:33:37,504 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-04 14:33:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:37,504 INFO L225 Difference]: With dead ends: 134 [2018-10-04 14:33:37,504 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 14:33:37,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 25 [2018-10-04 14:33:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 14:33:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 14:33:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 14:33:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 14:33:37,517 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-04 14:33:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:37,517 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 14:33:37,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 14:33:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 14:33:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 14:33:37,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:37,518 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-04 14:33:37,518 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:37,518 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-10-04 14:33:37,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:37,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:37,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:37,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:37,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:38,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:38,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:38,056 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:38,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:38,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:38,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:38,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:38,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-04 14:33:38,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:33:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:33:38,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:38,280 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-04 14:33:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:38,729 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 14:33:38,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:33:38,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-04 14:33:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:38,730 INFO L225 Difference]: With dead ends: 97 [2018-10-04 14:33:38,731 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 14:33:38,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 45 [2018-10-04 14:33:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 14:33:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-04 14:33:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 14:33:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 14:33:38,747 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-04 14:33:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:38,747 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 14:33:38,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:33:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 14:33:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 14:33:38,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:38,748 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-04 14:33:38,748 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:38,748 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:38,748 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-10-04 14:33:38,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:38,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:38,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:38,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:38,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:39,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:39,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:39,614 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:39,685 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 14:33:39,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:39,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:40,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:40,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-04 14:33:40,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 14:33:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 14:33:40,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:40,868 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 90 states. [2018-10-04 14:33:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:43,366 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 14:33:43,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:33:43,366 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-04 14:33:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:43,366 INFO L225 Difference]: With dead ends: 140 [2018-10-04 14:33:43,366 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 14:33:43,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.7s impTime 26 [2018-10-04 14:33:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 14:33:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 14:33:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 14:33:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 14:33:43,381 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-04 14:33:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:43,381 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 14:33:43,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 14:33:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 14:33:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 14:33:43,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:43,382 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-04 14:33:43,382 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:43,382 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-10-04 14:33:43,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:43,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:43,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:43,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:43,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:44,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:44,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:44,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:44,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 14:33:44,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:44,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:44,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:44,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-04 14:33:44,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:33:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:33:44,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:44,324 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-04 14:33:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:44,767 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 14:33:44,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:33:44,768 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-04 14:33:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:44,769 INFO L225 Difference]: With dead ends: 101 [2018-10-04 14:33:44,769 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 14:33:44,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 47 [2018-10-04 14:33:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 14:33:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-04 14:33:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 14:33:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 14:33:44,784 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-04 14:33:44,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:44,784 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 14:33:44,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:33:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 14:33:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 14:33:44,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:44,785 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-04 14:33:44,785 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:44,785 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-10-04 14:33:44,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:44,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:44,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:44,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:44,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:45,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:45,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:45,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:45,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:46,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:46,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-04 14:33:46,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 14:33:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 14:33:46,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:46,374 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 94 states. [2018-10-04 14:33:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:48,679 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 14:33:48,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:33:48,679 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-04 14:33:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:48,680 INFO L225 Difference]: With dead ends: 146 [2018-10-04 14:33:48,680 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 14:33:48,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 27 [2018-10-04 14:33:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 14:33:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 14:33:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 14:33:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 14:33:48,694 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-04 14:33:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:48,694 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 14:33:48,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 14:33:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 14:33:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 14:33:48,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:48,695 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-04 14:33:48,696 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:48,696 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:48,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-10-04 14:33:48,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:48,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:48,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:48,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:48,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:49,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:49,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:49,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:49,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:49,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:49,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:49,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:49,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-04 14:33:49,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:33:49,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:33:49,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:49,322 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-04 14:33:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:49,743 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 14:33:49,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:33:49,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-04 14:33:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:49,745 INFO L225 Difference]: With dead ends: 105 [2018-10-04 14:33:49,745 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 14:33:49,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 49 [2018-10-04 14:33:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 14:33:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-04 14:33:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 14:33:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 14:33:49,760 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-04 14:33:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:49,760 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 14:33:49,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:33:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 14:33:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 14:33:49,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:49,761 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-04 14:33:49,762 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:49,762 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-10-04 14:33:49,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:49,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:49,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:49,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:49,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:51,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:51,558 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 [2018-10-04 14:33:51,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:51,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 14:33:51,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:51,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:53,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:53,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-04 14:33:53,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 14:33:53,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 14:33:53,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:53,801 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 98 states. [2018-10-04 14:33:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:55,564 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 14:33:55,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:33:55,564 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-04 14:33:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:55,565 INFO L225 Difference]: With dead ends: 152 [2018-10-04 14:33:55,565 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 14:33:55,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.4s impTime 49 [2018-10-04 14:33:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 14:33:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 14:33:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:33:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 14:33:55,582 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-04 14:33:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:55,582 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 14:33:55,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 14:33:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 14:33:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:33:55,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:55,583 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-04 14:33:55,583 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:55,583 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-10-04 14:33:55,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:55,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:55,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:55,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:55,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:56,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:56,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:56,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:56,109 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:56,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:56,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:56,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:56,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-04 14:33:56,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:33:56,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:33:56,379 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:56,379 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-04 14:33:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:56,863 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 14:33:56,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:33:56,864 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-04 14:33:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:56,865 INFO L225 Difference]: With dead ends: 109 [2018-10-04 14:33:56,865 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 14:33:56,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 51 [2018-10-04 14:33:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 14:33:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-04 14:33:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 14:33:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 14:33:56,886 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-04 14:33:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:56,886 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 14:33:56,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:33:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 14:33:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 14:33:56,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:56,887 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-04 14:33:56,887 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:56,888 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-10-04 14:33:56,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:56,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:56,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:56,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:56,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:33:58,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:58,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:58,765 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:58,843 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 14:33:58,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:58,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:00,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:00,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-04 14:34:00,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 14:34:00,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 14:34:00,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:00,456 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 102 states. [2018-10-04 14:34:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:03,328 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 14:34:03,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:34:03,328 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-04 14:34:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:03,329 INFO L225 Difference]: With dead ends: 158 [2018-10-04 14:34:03,329 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 14:34:03,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.7s impTime 29 [2018-10-04 14:34:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 14:34:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 14:34:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 14:34:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 14:34:03,353 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-04 14:34:03,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:03,353 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 14:34:03,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 14:34:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 14:34:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:34:03,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:03,354 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-04 14:34:03,354 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:03,354 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-10-04 14:34:03,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:03,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:03,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:03,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:03,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:03,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:03,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:03,849 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:03,930 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 14:34:03,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:03,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:04,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:04,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-04 14:34:04,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:34:04,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:34:04,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:04,162 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-04 14:34:04,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:04,680 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 14:34:04,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:34:04,680 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-04 14:34:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:04,681 INFO L225 Difference]: With dead ends: 113 [2018-10-04 14:34:04,681 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 14:34:04,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 53 [2018-10-04 14:34:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 14:34:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-04 14:34:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 14:34:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 14:34:04,705 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-04 14:34:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:04,706 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 14:34:04,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:34:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 14:34:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 14:34:04,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:04,707 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-04 14:34:04,707 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:04,707 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:04,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-10-04 14:34:04,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:04,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:04,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:04,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:04,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:06,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:06,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:06,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:06,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:08,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:08,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-04 14:34:08,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 14:34:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 14:34:08,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:08,211 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 106 states. [2018-10-04 14:34:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:11,289 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 14:34:11,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:34:11,289 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-04 14:34:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:11,291 INFO L225 Difference]: With dead ends: 164 [2018-10-04 14:34:11,291 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 14:34:11,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.7s impTime 53 [2018-10-04 14:34:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 14:34:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 14:34:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 14:34:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 14:34:11,318 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-04 14:34:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:11,318 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 14:34:11,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 14:34:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 14:34:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 14:34:11,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:11,319 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-04 14:34:11,320 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:11,320 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-10-04 14:34:11,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:11,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:11,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:11,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:11,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:12,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:12,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:12,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:12,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:12,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:12,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:12,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:12,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-04 14:34:12,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:34:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:34:12,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:12,469 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-04 14:34:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:13,081 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 14:34:13,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:34:13,081 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-04 14:34:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:13,082 INFO L225 Difference]: With dead ends: 117 [2018-10-04 14:34:13,082 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 14:34:13,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 55 [2018-10-04 14:34:13,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 14:34:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-04 14:34:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 14:34:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 14:34:13,102 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-04 14:34:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:13,103 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 14:34:13,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:34:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 14:34:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 14:34:13,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:13,104 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-04 14:34:13,104 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:13,104 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-10-04 14:34:13,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:13,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:13,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:13,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:13,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:14,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:14,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:14,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:14,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 14:34:14,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:14,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:16,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:16,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-04 14:34:16,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 14:34:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 14:34:16,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:16,394 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 110 states. [2018-10-04 14:34:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:18,294 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 14:34:18,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:34:18,294 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-04 14:34:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:18,294 INFO L225 Difference]: With dead ends: 170 [2018-10-04 14:34:18,295 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 14:34:18,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.1s impTime 55 [2018-10-04 14:34:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 14:34:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 14:34:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 14:34:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 14:34:18,313 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-04 14:34:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:18,313 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 14:34:18,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 14:34:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 14:34:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 14:34:18,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:18,314 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-04 14:34:18,314 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:18,314 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-10-04 14:34:18,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:18,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:18,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:18,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:18,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:18,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:18,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:18,968 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:19,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:19,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:19,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:19,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:19,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-04 14:34:19,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:34:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:34:19,328 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:19,328 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-04 14:34:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:19,868 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 14:34:19,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:34:19,869 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-04 14:34:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:19,870 INFO L225 Difference]: With dead ends: 121 [2018-10-04 14:34:19,870 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 14:34:19,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 57 [2018-10-04 14:34:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 14:34:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-04 14:34:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 14:34:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 14:34:19,900 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-04 14:34:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:19,900 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 14:34:19,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:34:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 14:34:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 14:34:19,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:19,901 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-04 14:34:19,901 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:19,901 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-10-04 14:34:19,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:19,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:19,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:19,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:19,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:21,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:21,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:21,561 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:21,651 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 14:34:21,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:21,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:23,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-04 14:34:23,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 14:34:23,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 14:34:23,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:23,158 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 114 states. [2018-10-04 14:34:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:26,365 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-04 14:34:26,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:34:26,366 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-10-04 14:34:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:26,367 INFO L225 Difference]: With dead ends: 176 [2018-10-04 14:34:26,367 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 14:34:26,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.6s impTime 57 [2018-10-04 14:34:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 14:34:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 14:34:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 14:34:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 14:34:26,389 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-04 14:34:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:26,390 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 14:34:26,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 14:34:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 14:34:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:34:26,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:26,391 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-04 14:34:26,391 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:26,391 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-10-04 14:34:26,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:26,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:26,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:26,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:26,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:26,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:26,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:26,842 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 14:34:26,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:26,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:28,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:28,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-04 14:34:28,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:34:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:34:28,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:28,049 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-04 14:34:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:29,198 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-04 14:34:29,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 14:34:29,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-04 14:34:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:29,200 INFO L225 Difference]: With dead ends: 125 [2018-10-04 14:34:29,200 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 14:34:29,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.6s impTime 59 [2018-10-04 14:34:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 14:34:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-04 14:34:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 14:34:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-04 14:34:29,227 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-04 14:34:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:29,228 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-04 14:34:29,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:34:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-04 14:34:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 14:34:29,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:29,228 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-04 14:34:29,228 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:29,229 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-10-04 14:34:29,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:29,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:29,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:29,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:29,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:30,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:30,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:30,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:30,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:31,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:31,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-04 14:34:31,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 14:34:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 14:34:31,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:31,648 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 118 states. [2018-10-04 14:34:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:34,911 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-04 14:34:34,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 14:34:34,911 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-10-04 14:34:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:34,912 INFO L225 Difference]: With dead ends: 182 [2018-10-04 14:34:34,912 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 14:34:34,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.9s impTime 59 [2018-10-04 14:34:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 14:34:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 14:34:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 14:34:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-04 14:34:34,932 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-04 14:34:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:34,933 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-04 14:34:34,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 14:34:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-04 14:34:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 14:34:34,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:34,933 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-04 14:34:34,934 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:34,934 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-10-04 14:34:34,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:34,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:34,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:34,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:34,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:35,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:35,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:35,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:35,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:35,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:35,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:35,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:35,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-04 14:34:35,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:34:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:34:35,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:35,736 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-04 14:34:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:36,409 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-04 14:34:36,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:34:36,409 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-04 14:34:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:36,410 INFO L225 Difference]: With dead ends: 129 [2018-10-04 14:34:36,410 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 14:34:36,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.4s impTime 61 [2018-10-04 14:34:36,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 14:34:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-04 14:34:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 14:34:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-04 14:34:36,433 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-04 14:34:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:36,434 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-04 14:34:36,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:34:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-04 14:34:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 14:34:36,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:36,435 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-04 14:34:36,435 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:36,435 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-10-04 14:34:36,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:36,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:36,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:36,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:36,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:37,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:37,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:37,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:37,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 14:34:37,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:37,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:39,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:39,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-10-04 14:34:39,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 14:34:39,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 14:34:39,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:39,918 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 122 states. [2018-10-04 14:34:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:43,443 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-04 14:34:43,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:34:43,444 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-10-04 14:34:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:43,444 INFO L225 Difference]: With dead ends: 188 [2018-10-04 14:34:43,444 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 14:34:43,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.9s impTime 61 [2018-10-04 14:34:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 14:34:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 14:34:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 14:34:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-04 14:34:43,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-04 14:34:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:43,467 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-04 14:34:43,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 14:34:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-04 14:34:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 14:34:43,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:43,468 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-04 14:34:43,468 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:43,468 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:43,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-10-04 14:34:43,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:43,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:43,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:43,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:43,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:43,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:43,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:43,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:44,036 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:44,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:44,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:44,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:44,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-04 14:34:44,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:34:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:34:44,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:44,395 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-04 14:34:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:45,164 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-04 14:34:45,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:34:45,164 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-04 14:34:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:45,165 INFO L225 Difference]: With dead ends: 133 [2018-10-04 14:34:45,165 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 14:34:45,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 63 [2018-10-04 14:34:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 14:34:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-04 14:34:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 14:34:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-04 14:34:45,189 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-04 14:34:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:45,189 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-04 14:34:45,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:34:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-04 14:34:45,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 14:34:45,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:45,190 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-04 14:34:45,190 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:45,191 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-10-04 14:34:45,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:45,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:45,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:45,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:45,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:46,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:46,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:46,726 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:46,832 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 14:34:46,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:46,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:48,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:48,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-10-04 14:34:48,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 14:34:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 14:34:48,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:48,641 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 126 states. [2018-10-04 14:34:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:51,590 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-04 14:34:51,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 14:34:51,590 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-10-04 14:34:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:51,591 INFO L225 Difference]: With dead ends: 194 [2018-10-04 14:34:51,591 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 14:34:51,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.7s impTime 39 [2018-10-04 14:34:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 14:34:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 14:34:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 14:34:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-04 14:34:51,614 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-04 14:34:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:51,614 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-04 14:34:51,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 14:34:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-04 14:34:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 14:34:51,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:51,615 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-04 14:34:51,615 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:51,615 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:51,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-10-04 14:34:51,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:51,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:51,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:51,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:51,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:52,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:52,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:52,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:52,178 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 14:34:52,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:52,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:52,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:52,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-04 14:34:52,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:34:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:34:52,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:52,414 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-04 14:34:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:53,194 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-04 14:34:53,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 14:34:53,195 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-04 14:34:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:53,196 INFO L225 Difference]: With dead ends: 137 [2018-10-04 14:34:53,196 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 14:34:53,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 65 [2018-10-04 14:34:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 14:34:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-04 14:34:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 14:34:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-04 14:34:53,233 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-04 14:34:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:53,233 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-04 14:34:53,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:34:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-04 14:34:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 14:34:53,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:53,234 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-04 14:34:53,234 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:53,234 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:53,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-10-04 14:34:53,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:53,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:53,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:53,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:53,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:54,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:54,900 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) [2018-10-04 14:34:54,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:54,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:56,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:56,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-10-04 14:34:56,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 14:34:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 14:34:56,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:56,780 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 130 states. [2018-10-04 14:34:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:59,431 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-04 14:34:59,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 14:34:59,431 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-10-04 14:34:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:59,432 INFO L225 Difference]: With dead ends: 200 [2018-10-04 14:34:59,432 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 14:34:59,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.7s impTime 36 [2018-10-04 14:34:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 14:34:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 14:34:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 14:34:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-04 14:34:59,453 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-04 14:34:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:59,453 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-04 14:34:59,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 14:34:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-04 14:34:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 14:34:59,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:59,454 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-04 14:34:59,454 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:59,454 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:59,454 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-10-04 14:34:59,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:59,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:59,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:59,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:59,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:00,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:00,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:00,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:00,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:00,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:00,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:00,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:00,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-04 14:35:00,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:35:00,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:35:00,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:00,715 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-04 14:35:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:01,609 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-04 14:35:01,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 14:35:01,609 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-04 14:35:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:01,610 INFO L225 Difference]: With dead ends: 141 [2018-10-04 14:35:01,610 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 14:35:01,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.0s impTime 67 [2018-10-04 14:35:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 14:35:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-04 14:35:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 14:35:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-04 14:35:01,637 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-04 14:35:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:01,637 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-04 14:35:01,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:35:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-04 14:35:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 14:35:01,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:01,638 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-04 14:35:01,638 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:01,639 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-10-04 14:35:01,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:01,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:01,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:01,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:01,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:03,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:03,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:03,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:03,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 14:35:03,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:03,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:05,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:05,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-10-04 14:35:05,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-04 14:35:05,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-04 14:35:05,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:05,739 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 134 states. [2018-10-04 14:35:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:08,832 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-04 14:35:08,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 14:35:08,832 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-10-04 14:35:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:08,832 INFO L225 Difference]: With dead ends: 206 [2018-10-04 14:35:08,833 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 14:35:08,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.4s impTime 67 [2018-10-04 14:35:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 14:35:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 14:35:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 14:35:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-04 14:35:08,858 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-04 14:35:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:08,858 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-04 14:35:08,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-04 14:35:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-04 14:35:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 14:35:08,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:08,859 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-04 14:35:08,860 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:08,860 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:08,860 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-10-04 14:35:08,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:08,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:08,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:08,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:08,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:09,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:09,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:09,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:09,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:09,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:09,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:09,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:09,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-04 14:35:09,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:35:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:35:09,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:09,712 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-04 14:35:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:10,779 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-04 14:35:10,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 14:35:10,780 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-04 14:35:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:10,781 INFO L225 Difference]: With dead ends: 145 [2018-10-04 14:35:10,781 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 14:35:10,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 69 [2018-10-04 14:35:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 14:35:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-04 14:35:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 14:35:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-04 14:35:10,818 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-04 14:35:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:10,818 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-04 14:35:10,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:35:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-04 14:35:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 14:35:10,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:10,819 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-04 14:35:10,819 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:10,820 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-10-04 14:35:10,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:10,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:10,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:10,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:10,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:12,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:12,376 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 [2018-10-04 14:35:12,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:12,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 14:35:12,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:12,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:14,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:14,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-10-04 14:35:14,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 14:35:14,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 14:35:14,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:14,591 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 138 states. [2018-10-04 14:35:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:18,252 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-04 14:35:18,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 14:35:18,252 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-10-04 14:35:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:18,253 INFO L225 Difference]: With dead ends: 212 [2018-10-04 14:35:18,253 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 14:35:18,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.2s impTime 69 [2018-10-04 14:35:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 14:35:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 14:35:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 14:35:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-04 14:35:18,280 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-04 14:35:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:18,280 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-04 14:35:18,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 14:35:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-04 14:35:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 14:35:18,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:18,281 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-04 14:35:18,281 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:18,281 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:18,282 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-10-04 14:35:18,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:18,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:18,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:18,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:18,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:18,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:18,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:18,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:18,887 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-04 14:35:18,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:18,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:19,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:19,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-04 14:35:19,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:35:19,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:35:19,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:19,138 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-04 14:35:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:20,244 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-04 14:35:20,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 14:35:20,245 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-04 14:35:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:20,246 INFO L225 Difference]: With dead ends: 149 [2018-10-04 14:35:20,246 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 14:35:20,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 71 [2018-10-04 14:35:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 14:35:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-04 14:35:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 14:35:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-04 14:35:20,275 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-04 14:35:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:20,276 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-04 14:35:20,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:35:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-04 14:35:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 14:35:20,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:20,276 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-04 14:35:20,277 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:20,277 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-10-04 14:35:20,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:20,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:20,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:20,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:20,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:21,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:21,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:21,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:21,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:22,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:22,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-10-04 14:35:22,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 14:35:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 14:35:22,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:22,935 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 142 states. [2018-10-04 14:35:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:24,620 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-04 14:35:24,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 14:35:24,620 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-10-04 14:35:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:24,621 INFO L225 Difference]: With dead ends: 218 [2018-10-04 14:35:24,621 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 14:35:24,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime 39 [2018-10-04 14:35:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 14:35:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 14:35:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 14:35:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-04 14:35:24,647 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-04 14:35:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:24,647 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-04 14:35:24,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 14:35:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-04 14:35:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 14:35:24,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:24,648 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-04 14:35:24,648 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:24,648 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-10-04 14:35:24,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:24,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:24,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:24,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:24,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:25,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:25,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:25,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:25,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:25,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:25,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:25,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:25,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-04 14:35:25,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:35:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:35:25,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:25,524 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-04 14:35:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:26,395 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-04 14:35:26,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 14:35:26,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-04 14:35:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:26,397 INFO L225 Difference]: With dead ends: 153 [2018-10-04 14:35:26,397 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 14:35:26,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 73 [2018-10-04 14:35:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 14:35:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-04 14:35:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 14:35:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-04 14:35:26,432 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-04 14:35:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:26,432 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-04 14:35:26,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:35:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-04 14:35:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 14:35:26,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:26,433 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-04 14:35:26,433 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:26,433 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-10-04 14:35:26,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:26,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:26,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:26,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:26,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:27,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:27,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:27,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:27,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 14:35:27,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:27,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:29,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:29,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 145 [2018-10-04 14:35:29,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-04 14:35:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-04 14:35:29,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:29,124 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 146 states. [2018-10-04 14:35:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:30,789 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-04 14:35:30,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 14:35:30,789 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-10-04 14:35:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:30,790 INFO L225 Difference]: With dead ends: 224 [2018-10-04 14:35:30,790 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 14:35:30,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime 40 [2018-10-04 14:35:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 14:35:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 14:35:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 14:35:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-04 14:35:30,831 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-04 14:35:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:30,831 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-04 14:35:30,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-04 14:35:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-04 14:35:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 14:35:30,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:30,832 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-04 14:35:30,832 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:30,832 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-10-04 14:35:30,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:30,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:30,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:30,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:30,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:31,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:31,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:31,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:31,488 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:31,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:31,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:31,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:31,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-04 14:35:31,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:35:31,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:35:31,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:31,759 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-04 14:35:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:32,826 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-04 14:35:32,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 14:35:32,826 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-04 14:35:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:32,827 INFO L225 Difference]: With dead ends: 157 [2018-10-04 14:35:32,827 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 14:35:32,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 75 [2018-10-04 14:35:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 14:35:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-04 14:35:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 14:35:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-04 14:35:32,868 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-04 14:35:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:32,869 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-04 14:35:32,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:35:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-04 14:35:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 14:35:32,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:32,870 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-04 14:35:32,870 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:32,870 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-10-04 14:35:32,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:32,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:32,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:32,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:34,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:34,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:34,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:34,622 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 14:35:34,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:34,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:37,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:37,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 149 [2018-10-04 14:35:37,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 14:35:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 14:35:37,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:37,184 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 150 states. [2018-10-04 14:35:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:41,356 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-04 14:35:41,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 14:35:41,356 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-10-04 14:35:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:41,357 INFO L225 Difference]: With dead ends: 230 [2018-10-04 14:35:41,357 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 14:35:41,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time 5.0s impTime 75 [2018-10-04 14:35:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 14:35:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 14:35:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 14:35:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-04 14:35:41,395 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-04 14:35:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:41,396 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-04 14:35:41,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 14:35:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-04 14:35:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 14:35:41,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:41,397 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-04 14:35:41,397 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:41,397 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-10-04 14:35:41,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:41,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:41,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:41,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:41,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:41,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:41,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:41,969 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:42,108 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 14:35:42,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:42,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:42,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:42,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-04 14:35:42,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:35:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:35:42,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:42,394 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-04 14:35:43,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:43,375 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-04 14:35:43,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 14:35:43,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-04 14:35:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:43,377 INFO L225 Difference]: With dead ends: 161 [2018-10-04 14:35:43,377 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 14:35:43,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 77 [2018-10-04 14:35:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 14:35:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-04 14:35:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 14:35:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-04 14:35:43,410 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-04 14:35:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:43,410 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-04 14:35:43,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:35:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-04 14:35:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 14:35:43,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:43,411 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-04 14:35:43,411 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:43,411 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-10-04 14:35:43,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:43,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:43,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:43,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:43,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:45,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:45,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:45,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:45,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:48,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:48,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 153 [2018-10-04 14:35:48,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 14:35:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 14:35:48,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:48,153 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 154 states. [2018-10-04 14:35:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:52,382 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-04 14:35:52,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 14:35:52,383 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-10-04 14:35:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:52,383 INFO L225 Difference]: With dead ends: 236 [2018-10-04 14:35:52,383 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 14:35:52,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s Time 5.4s impTime 77 [2018-10-04 14:35:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 14:35:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 14:35:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 14:35:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-04 14:35:52,416 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-04 14:35:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:52,416 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-04 14:35:52,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 14:35:52,416 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-04 14:35:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 14:35:52,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:52,417 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-04 14:35:52,417 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:52,417 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-10-04 14:35:52,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:52,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:52,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:52,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:52,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:52,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:52,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:52,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:53,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:53,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:53,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:53,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:53,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-04 14:35:53,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:35:53,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:35:53,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:53,367 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-04 14:35:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:54,223 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-04 14:35:54,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 14:35:54,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-04 14:35:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:54,225 INFO L225 Difference]: With dead ends: 165 [2018-10-04 14:35:54,225 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 14:35:54,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 79 [2018-10-04 14:35:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 14:35:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-04 14:35:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 14:35:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-04 14:35:54,265 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-04 14:35:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:54,266 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-04 14:35:54,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:35:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-04 14:35:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 14:35:54,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:54,266 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-04 14:35:54,267 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:54,267 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-10-04 14:35:54,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:54,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:54,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:54,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:54,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:56,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:56,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:56,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:56,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 14:35:56,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:56,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:58,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:58,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 157 [2018-10-04 14:35:58,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-04 14:35:58,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-04 14:35:58,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:58,956 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 158 states. [2018-10-04 14:36:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:03,611 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-04 14:36:03,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 14:36:03,612 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-10-04 14:36:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:03,612 INFO L225 Difference]: With dead ends: 242 [2018-10-04 14:36:03,612 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 14:36:03,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s Time 5.5s impTime 43 [2018-10-04 14:36:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 14:36:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 14:36:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 14:36:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-04 14:36:03,654 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-04 14:36:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:03,654 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-04 14:36:03,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-04 14:36:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-04 14:36:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 14:36:03,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:03,655 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-04 14:36:03,655 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:03,655 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-10-04 14:36:03,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:03,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:03,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:03,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:03,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:04,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:04,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:04,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:36:04,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:36:04,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:04,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:04,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:04,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-04 14:36:04,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:36:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:36:04,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:04,707 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-04 14:36:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:05,807 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-04 14:36:05,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 14:36:05,807 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-04 14:36:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:05,809 INFO L225 Difference]: With dead ends: 169 [2018-10-04 14:36:05,809 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 14:36:05,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 81 [2018-10-04 14:36:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 14:36:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-04 14:36:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 14:36:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-04 14:36:05,847 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-04 14:36:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:05,847 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-04 14:36:05,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:36:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-04 14:36:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 14:36:05,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:05,848 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-04 14:36:05,848 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:05,848 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-10-04 14:36:05,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:05,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:05,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:05,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:05,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:07,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:07,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:07,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:07,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 14:36:07,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:07,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:09,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:09,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 161 [2018-10-04 14:36:09,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 14:36:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 14:36:09,351 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:09,351 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 162 states. [2018-10-04 14:36:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:10,907 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-04 14:36:10,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 14:36:10,908 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-10-04 14:36:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:10,908 INFO L225 Difference]: With dead ends: 248 [2018-10-04 14:36:10,908 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 14:36:10,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.3s impTime 81 [2018-10-04 14:36:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 14:36:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 14:36:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 14:36:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-04 14:36:10,947 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-04 14:36:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:10,947 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-04 14:36:10,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 14:36:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-04 14:36:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 14:36:10,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:10,948 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-04 14:36:10,948 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:10,949 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-10-04 14:36:10,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:10,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:10,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:10,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:10,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:11,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:11,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:11,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:36:11,718 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-04 14:36:11,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:11,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:12,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:12,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-04 14:36:12,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:36:12,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:36:12,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:12,090 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-04 14:36:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:13,159 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-04 14:36:13,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 14:36:13,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-04 14:36:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:13,161 INFO L225 Difference]: With dead ends: 173 [2018-10-04 14:36:13,161 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 14:36:13,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.8s impTime 83 [2018-10-04 14:36:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 14:36:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-04 14:36:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 14:36:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-04 14:36:13,199 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-04 14:36:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:13,199 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-04 14:36:13,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:36:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-04 14:36:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 14:36:13,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:13,200 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-04 14:36:13,200 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:13,200 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 79 times [2018-10-04 14:36:13,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:13,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:13,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:13,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:13,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:14,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:14,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:14,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:14,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:16,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:16,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 165 [2018-10-04 14:36:16,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-04 14:36:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-04 14:36:16,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:16,590 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 166 states. [2018-10-04 14:36:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:20,830 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-04 14:36:20,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 14:36:20,830 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-10-04 14:36:20,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:20,831 INFO L225 Difference]: With dead ends: 254 [2018-10-04 14:36:20,831 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 14:36:20,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.2s impTime 83 [2018-10-04 14:36:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 14:36:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 14:36:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 14:36:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-04 14:36:20,881 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-04 14:36:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:20,881 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-04 14:36:20,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-04 14:36:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-04 14:36:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 14:36:20,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:20,882 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-04 14:36:20,882 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:20,882 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:20,882 INFO L82 PathProgramCache]: Analyzing trace with hash -436388571, now seen corresponding path program 80 times [2018-10-04 14:36:20,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:20,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:20,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:20,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:20,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:21,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:21,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:21,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:21,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:21,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:21,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:21,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:21,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-04 14:36:21,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:36:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:36:21,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:21,882 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-04 14:36:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:22,832 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-04 14:36:22,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 14:36:22,832 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-04 14:36:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:22,833 INFO L225 Difference]: With dead ends: 177 [2018-10-04 14:36:22,833 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 14:36:22,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime 85 [2018-10-04 14:36:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 14:36:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-04 14:36:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 14:36:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-04 14:36:22,873 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-04 14:36:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:22,873 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-04 14:36:22,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:36:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-04 14:36:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 14:36:22,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:22,874 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-04 14:36:22,874 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:22,875 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 81 times [2018-10-04 14:36:22,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:22,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:22,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:22,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:22,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:24,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:24,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:24,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:36:24,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 14:36:24,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:24,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:26,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:26,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 169 [2018-10-04 14:36:26,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-10-04 14:36:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-10-04 14:36:26,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:26,415 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 170 states. [2018-10-04 14:36:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:30,147 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-04 14:36:30,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 14:36:30,147 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-10-04 14:36:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:30,148 INFO L225 Difference]: With dead ends: 260 [2018-10-04 14:36:30,148 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 14:36:30,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.0s impTime 46 [2018-10-04 14:36:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 14:36:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 14:36:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 14:36:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-04 14:36:30,195 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-04 14:36:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:30,196 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-04 14:36:30,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-10-04 14:36:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-04 14:36:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 14:36:30,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:30,196 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-04 14:36:30,197 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:30,197 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1739485543, now seen corresponding path program 82 times [2018-10-04 14:36:30,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:30,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:30,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:30,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:30,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:30,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:30,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:30,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:36:30,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:36:30,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:30,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:31,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:31,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-04 14:36:31,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:36:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:36:31,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:31,096 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-04 14:36:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:32,337 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-04 14:36:32,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 14:36:32,338 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-04 14:36:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:32,339 INFO L225 Difference]: With dead ends: 181 [2018-10-04 14:36:32,339 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 14:36:32,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 87 [2018-10-04 14:36:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 14:36:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-04 14:36:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 14:36:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-04 14:36:32,383 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-10-04 14:36:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:32,383 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-04 14:36:32,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:36:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-04 14:36:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 14:36:32,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:32,384 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-04 14:36:32,384 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:32,384 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 83 times [2018-10-04 14:36:32,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:32,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:32,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:32,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:32,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:33,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:33,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:36:33,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:34,054 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 14:36:34,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:34,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:36:36,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:36,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 173 [2018-10-04 14:36:36,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-10-04 14:36:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-10-04 14:36:36,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:36,366 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 174 states. Received shutdown request... [2018-10-04 14:36:39,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 14:36:39,092 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:36:39,098 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:36:39,098 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:36:39 BoogieIcfgContainer [2018-10-04 14:36:39,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:36:39,099 INFO L168 Benchmark]: Toolchain (without parser) took 238034.94 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -102.8 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 442.4 MB). Peak memory consumption was 339.6 MB. Max. memory is 7.1 GB. [2018-10-04 14:36:39,101 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 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. [2018-10-04 14:36:39,102 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.94 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. [2018-10-04 14:36:39,102 INFO L168 Benchmark]: Boogie Preprocessor took 25.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:36:39,102 INFO L168 Benchmark]: RCFGBuilder took 307.45 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. [2018-10-04 14:36:39,103 INFO L168 Benchmark]: TraceAbstraction took 237654.35 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -102.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 421.2 MB). Peak memory consumption was 318.5 MB. Max. memory is 7.1 GB. [2018-10-04 14:36:39,106 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 0.24 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 42.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 307.45 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 237654.35 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -102.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 421.2 MB). Peak memory consumption was 318.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was constructing difference of abstraction (175states) and FLOYD_HOARE automaton (currently 73 states, 174 states before enhancement), while ReachableStatesComputation was computing reachable states (195 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 237.5s OverallTime, 85 OverallIterations, 43 TraceHistogramMax, 106.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1285 SDtfs, 946 SDslu, 7016 SDs, 0 SdLazy, 68781 SolverSat, 4363 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13295 GetRequests, 6568 SyntacticMatches, 0 SemanticMatches, 6727 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 159.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=84, 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: 1.5s AutomataMinimizationTime, 84 MinimizatonAttempts, 168 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 118.2s InterpolantComputationTime, 15286 NumberOfCodeBlocks, 15286 NumberOfCodeBlocksAsserted, 1098 NumberOfCheckSat, 15118 ConstructedInterpolants, 0 QuantifiedInterpolants, 8968975 SizeOfPredicates, 333 NumberOfNonLiveVariables, 30877 ConjunctsInSsa, 4108 ConjunctsInUnsatCore, 168 InterpolantComputations, 2 PerfectInterpolantSequences, 105950/208290 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/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-36-39-117.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-36-39-117.csv Completed graceful shutdown