java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:31:48,784 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:31:48,786 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:31:48,802 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:31:48,802 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:31:48,803 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:31:48,805 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:31:48,807 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:31:48,808 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:31:48,809 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:31:48,810 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:31:48,835 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:31:48,851 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:31:48,851 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:31:48,852 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:31:48,853 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:31:48,853 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:31:48,853 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:31:48,854 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:31:48,854 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:31:48,854 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:31:48,854 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:31:48,855 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:31:48,855 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:31:48,855 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:31:48,855 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:31:48,855 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:31:48,856 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:31:48,856 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:31:48,856 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:31:48,856 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:31:48,856 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:31:48,857 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:31:48,857 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:31:48,857 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:31:48,857 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:31:48,857 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:31:48,858 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:31:48,858 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:31:48,858 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:31:48,858 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:31:48,858 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:31:48,903 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:31:48,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:31:48,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:31:48,928 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:31:48,928 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:31:48,929 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl [2018-09-30 10:31:48,930 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEqualityWithBranches.bpl' [2018-09-30 10:31:48,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:31:48,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:31:48,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:31:48,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:31:48,989 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:31:49,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,030 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:31:49,030 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:31:49,031 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:31:49,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:31:49,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:31:49,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:31:49,035 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:31:49,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... [2018-09-30 10:31:49,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:31:49,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:31:49,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:31:49,058 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:31:49,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:31:49,139 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:31:49,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:31:49,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:31:49,385 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:31:49,386 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:31:49 BoogieIcfgContainer [2018-09-30 10:31:49,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:31:49,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:31:49,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:31:49,399 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:31:49,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:48" (1/2) ... [2018-09-30 10:31:49,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8e4b55 and model type HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:31:49, skipping insertion in model container [2018-09-30 10:31:49,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:31:49" (2/2) ... [2018-09-30 10:31:49,404 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEqualityWithBranches.bpl [2018-09-30 10:31:49,417 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:31:49,432 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:31:49,488 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:31:49,489 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:31:49,490 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:31:49,490 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:31:49,490 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:31:49,490 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:31:49,490 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:31:49,491 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:31:49,491 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:31:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 10:31:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 10:31:49,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:49,527 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 10:31:49,528 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:49,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash 979, now seen corresponding path program 1 times [2018-09-30 10:31:49,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:49,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:49,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:49,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:49,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:49,719 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:31:49,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:31:49,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:31:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:31:49,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:31:49,740 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 10:31:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:49,816 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 10:31:49,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:31:49,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 10:31:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:49,846 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:31:49,846 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:31:49,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:31:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:31:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:31:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:31:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-09-30 10:31:49,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 2 [2018-09-30 10:31:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:49,931 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-09-30 10:31:49,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:31:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 9 transitions. [2018-09-30 10:31:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:31:49,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:49,932 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:31:49,932 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:49,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash 28757385, now seen corresponding path program 1 times [2018-09-30 10:31:49,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:49,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:49,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:49,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:49,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:49,958 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:31:49,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:31:49,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:31:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:31:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:31:49,961 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-09-30 10:31:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,003 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2018-09-30 10:31:50,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:31:50,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 10:31:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,004 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:31:50,004 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:31:50,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:31:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:31:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:31:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:31:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 10:31:50,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 10:31:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,009 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 10:31:50,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:31:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 10:31:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:31:50,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,010 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:31:50,010 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,010 INFO L82 PathProgramCache]: Analyzing trace with hash 28757447, now seen corresponding path program 1 times [2018-09-30 10:31:50,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:50,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:50,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:50,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:50,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 10:31:50,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:31:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:31:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:31:50,166 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-30 10:31:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,206 INFO L93 Difference]: Finished difference Result 14 states and 20 transitions. [2018-09-30 10:31:50,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:31:50,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 10:31:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,207 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:31:50,207 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:31:50,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:31:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:31:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:31:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:31:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 10:31:50,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 5 [2018-09-30 10:31:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,212 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 10:31:50,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:31:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 10:31:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:31:50,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,213 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2018-09-30 10:31:50,214 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203669, now seen corresponding path program 1 times [2018-09-30 10:31:50,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:50,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:50,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:50,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:50,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:31:50,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:31:50,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:31:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:31:50,344 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-30 10:31:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,365 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2018-09-30 10:31:50,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:31:50,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 10:31:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,366 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:31:50,366 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:31:50,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:31:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:31:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:31:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:31:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-09-30 10:31:50,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2018-09-30 10:31:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,371 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-09-30 10:31:50,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:31:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-09-30 10:31:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:31:50,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,372 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1] [2018-09-30 10:31:50,372 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2014203731, now seen corresponding path program 2 times [2018-09-30 10:31:50,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:50,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:50,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:50,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:50,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:50,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:50,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:50,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:31:50,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:31:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:31:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:31:50,530 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states. [2018-09-30 10:31:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,592 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 10:31:50,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:31:50,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 10:31:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,593 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:31:50,593 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:31:50,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:31:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:31:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:31:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:31:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-30 10:31:50,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-30 10:31:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,599 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-30 10:31:50,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:31:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-30 10:31:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:31:50,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,600 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2018-09-30 10:31:50,600 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash 154849801, now seen corresponding path program 2 times [2018-09-30 10:31:50,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:50,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:50,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:50,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:50,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:50,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:50,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:50,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:31:50,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:31:50,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:31:50,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:31:50,779 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2018-09-30 10:31:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,889 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2018-09-30 10:31:50,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:31:50,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-30 10:31:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,891 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:31:50,891 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:31:50,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:31:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:31:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:31:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:31:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 10:31:50,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-30 10:31:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,897 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 10:31:50,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:31:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 10:31:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:31:50,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,898 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1] [2018-09-30 10:31:50,899 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 154849863, now seen corresponding path program 3 times [2018-09-30 10:31:50,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:50,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:51,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:51,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:51,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:51,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:31:51,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:51,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:51,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:51,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:31:51,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:31:51,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:31:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:31:51,089 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-30 10:31:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:51,127 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-30 10:31:51,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:31:51,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-30 10:31:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:51,129 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:31:51,129 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:31:51,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:31:51,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:31:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:31:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:31:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 10:31:51,134 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2018-09-30 10:31:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:51,134 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 10:31:51,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:31:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 10:31:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:31:51,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:51,136 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1] [2018-09-30 10:31:51,136 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:51,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:51,136 INFO L82 PathProgramCache]: Analyzing trace with hash 336984725, now seen corresponding path program 3 times [2018-09-30 10:31:51,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:51,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:51,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:51,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:51,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:51,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:51,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:51,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:51,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:31:51,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:51,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:51,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:51,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 10:31:51,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:31:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:31:51,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:31:51,438 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 11 states. [2018-09-30 10:31:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:52,019 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-30 10:31:52,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:31:52,020 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-09-30 10:31:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:52,021 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:31:52,021 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:31:52,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:31:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:31:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:31:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:31:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-30 10:31:52,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-30 10:31:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:52,028 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-30 10:31:52,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:31:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-30 10:31:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:31:52,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:52,029 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2018-09-30 10:31:52,029 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:52,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810761, now seen corresponding path program 4 times [2018-09-30 10:31:52,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:52,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:52,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:52,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:52,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:52,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:52,188 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:52,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:52,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:52,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:31:52,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:31:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:31:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:31:52,218 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2018-09-30 10:31:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:52,244 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-30 10:31:52,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:31:52,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-09-30 10:31:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:52,245 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:31:52,246 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:31:52,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:31:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:31:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:31:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:31:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 10:31:52,252 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-30 10:31:52,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:52,252 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 10:31:52,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:31:52,252 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 10:31:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:31:52,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:52,253 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1] [2018-09-30 10:31:52,253 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:52,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:52,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1774810823, now seen corresponding path program 4 times [2018-09-30 10:31:52,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:52,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:52,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:52,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:52,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:52,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:52,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:52,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:52,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:52,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:31:52,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:31:52,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:31:52,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:31:52,417 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-30 10:31:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:52,476 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-09-30 10:31:52,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:31:52,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-30 10:31:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:52,477 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:31:52,477 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:31:52,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:31:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:31:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:31:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:31:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-30 10:31:52,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-09-30 10:31:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:52,482 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-30 10:31:52,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:31:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-30 10:31:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:31:52,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:52,483 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1] [2018-09-30 10:31:52,484 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:52,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561067, now seen corresponding path program 5 times [2018-09-30 10:31:52,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:52,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:52,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:52,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:52,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:52,670 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:52,682 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:31:52,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:52,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:52,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:31:52,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:31:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:31:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:31:52,718 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2018-09-30 10:31:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:52,769 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-09-30 10:31:52,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:31:52,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-30 10:31:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:52,770 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:31:52,770 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:31:52,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:31:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:31:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:31:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:31:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-30 10:31:52,775 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-30 10:31:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:52,775 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-30 10:31:52,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:31:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-30 10:31:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:31:52,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:52,776 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1] [2018-09-30 10:31:52,777 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:52,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1953561005, now seen corresponding path program 5 times [2018-09-30 10:31:52,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:52,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:52,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:52,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:52,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:52,913 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:52,942 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:31:52,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:52,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:52,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:52,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:31:52,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:31:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:31:52,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:31:52,973 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-09-30 10:31:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:53,011 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-09-30 10:31:53,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:31:53,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-09-30 10:31:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:53,012 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:31:53,013 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:31:53,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:31:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:31:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:31:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:31:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 10:31:53,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-30 10:31:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:53,018 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 10:31:53,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:31:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 10:31:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:31:53,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:53,019 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1] [2018-09-30 10:31:53,019 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:53,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:53,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1729447159, now seen corresponding path program 6 times [2018-09-30 10:31:53,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:53,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:53,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:53,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:53,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:53,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:53,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:53,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:53,179 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:31:53,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:53,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:53,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:53,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 10:31:53,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:31:53,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:31:53,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:31:53,403 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 17 states. [2018-09-30 10:31:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:53,789 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-09-30 10:31:53,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:31:53,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-09-30 10:31:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:53,790 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:31:53,791 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:31:53,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:31:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:31:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:31:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:31:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 10:31:53,796 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-30 10:31:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:53,796 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 10:31:53,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:31:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 10:31:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:31:53,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:53,798 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1] [2018-09-30 10:31:53,798 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:53,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash 468808085, now seen corresponding path program 7 times [2018-09-30 10:31:53,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:53,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:53,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:53,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:53,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:54,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:54,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:54,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:54,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:54,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:54,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:31:54,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:31:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:31:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:31:54,162 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2018-09-30 10:31:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:54,191 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-09-30 10:31:54,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:31:54,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-09-30 10:31:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:54,193 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:31:54,193 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:31:54,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:31:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:31:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:31:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:31:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-30 10:31:54,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-30 10:31:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:54,201 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-30 10:31:54,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:31:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-30 10:31:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:31:54,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:54,202 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1] [2018-09-30 10:31:54,202 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:54,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:54,202 INFO L82 PathProgramCache]: Analyzing trace with hash 468808147, now seen corresponding path program 6 times [2018-09-30 10:31:54,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:54,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:54,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:54,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:54,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:54,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:54,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:54,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:31:54,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:54,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:54,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:54,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:31:54,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:31:54,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:31:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:31:54,426 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-09-30 10:31:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:54,518 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-30 10:31:54,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:31:54,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-09-30 10:31:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:54,519 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:31:54,519 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:31:54,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:31:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:31:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:31:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:31:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 10:31:54,524 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-09-30 10:31:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:54,525 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 10:31:54,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:31:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 10:31:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:31:54,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:54,526 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1] [2018-09-30 10:31:54,526 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:54,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash -970547319, now seen corresponding path program 8 times [2018-09-30 10:31:54,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:54,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:54,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:54,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:54,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:54,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:54,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:54,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:54,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:54,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:54,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:54,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:31:54,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:31:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:31:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:31:54,747 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-09-30 10:31:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:54,790 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2018-09-30 10:31:54,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:31:54,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-09-30 10:31:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:54,791 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:31:54,791 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:31:54,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:31:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:31:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:31:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:31:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-30 10:31:54,799 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-30 10:31:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:54,799 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-30 10:31:54,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:31:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-30 10:31:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:31:54,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:54,800 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1] [2018-09-30 10:31:54,800 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:54,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:54,801 INFO L82 PathProgramCache]: Analyzing trace with hash -970547257, now seen corresponding path program 7 times [2018-09-30 10:31:54,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:54,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:54,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:54,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:54,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:54,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:54,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:54,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:55,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:55,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:31:55,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:31:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:31:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:31:55,012 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2018-09-30 10:31:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:55,059 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-09-30 10:31:55,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:31:55,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-09-30 10:31:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:55,066 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:31:55,067 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:31:55,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:31:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:31:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:31:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:31:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-30 10:31:55,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-09-30 10:31:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:55,074 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-30 10:31:55,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:31:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-30 10:31:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:31:55,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:55,077 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1] [2018-09-30 10:31:55,077 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:55,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 146095381, now seen corresponding path program 9 times [2018-09-30 10:31:55,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:55,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:55,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:55,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:55,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:55,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:55,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:55,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:55,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 10:31:55,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:55,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:55,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:55,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 10:31:55,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:31:55,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:31:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:31:55,755 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2018-09-30 10:31:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:56,481 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2018-09-30 10:31:56,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:31:56,482 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2018-09-30 10:31:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:56,483 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:31:56,483 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:31:56,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:31:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:31:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:31:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:31:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-30 10:31:56,491 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-09-30 10:31:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:56,491 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-30 10:31:56,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:31:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-30 10:31:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:31:56,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:56,493 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2018-09-30 10:31:56,493 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:56,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1527063561, now seen corresponding path program 10 times [2018-09-30 10:31:56,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:56,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:56,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:56,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:56,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:56,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:56,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:56,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:56,673 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:56,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:56,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:56,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:56,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 10:31:56,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:31:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:31:56,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:31:56,895 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2018-09-30 10:31:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:57,524 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-09-30 10:31:57,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:31:57,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-09-30 10:31:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:57,525 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:31:57,525 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:31:57,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:31:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:31:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:31:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:31:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 10:31:57,532 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2018-09-30 10:31:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:57,533 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 10:31:57,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:31:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 10:31:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:31:57,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:57,534 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1] [2018-09-30 10:31:57,535 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:57,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:57,535 INFO L82 PathProgramCache]: Analyzing trace with hash 458385557, now seen corresponding path program 11 times [2018-09-30 10:31:57,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:57,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:57,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:57,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:57,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:58,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:58,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:58,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:31:58,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:58,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:58,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:31:58,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:31:58,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:31:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:31:58,284 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2018-09-30 10:31:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:58,386 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-09-30 10:31:58,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:31:58,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-30 10:31:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:58,389 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:31:58,389 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:31:58,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:31:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:31:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:31:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:31:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-30 10:31:58,394 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-30 10:31:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:58,394 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-30 10:31:58,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:31:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-30 10:31:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:31:58,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:58,395 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1] [2018-09-30 10:31:58,396 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:58,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 458385619, now seen corresponding path program 8 times [2018-09-30 10:31:58,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:58,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:58,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:58,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:58,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:58,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:58,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:58,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:58,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:58,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:58,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:31:58,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:31:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:31:58,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:31:58,643 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-30 10:31:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:58,700 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2018-09-30 10:31:58,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:31:58,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-09-30 10:31:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:58,701 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:31:58,702 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:31:58,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:31:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:31:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:31:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:31:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-30 10:31:58,707 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-09-30 10:31:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:58,708 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-30 10:31:58,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:31:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-30 10:31:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:31:58,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:58,709 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1] [2018-09-30 10:31:58,709 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:58,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2064533641, now seen corresponding path program 12 times [2018-09-30 10:31:58,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:58,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:58,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:58,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:58,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:58,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:58,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:58,922 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 10:31:58,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:58,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:59,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:59,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 10:31:59,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:31:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:31:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:31:59,274 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 29 states. [2018-09-30 10:31:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:59,976 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-09-30 10:31:59,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:31:59,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 41 [2018-09-30 10:31:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:59,980 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:31:59,980 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:31:59,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:31:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:31:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:31:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:31:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 10:31:59,985 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2018-09-30 10:31:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:59,986 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 10:31:59,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:31:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 10:31:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:31:59,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:59,987 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1] [2018-09-30 10:31:59,987 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:59,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash 591459349, now seen corresponding path program 13 times [2018-09-30 10:31:59,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:59,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:59,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:59,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:59,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:00,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:00,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:00,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:00,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:00,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:00,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:32:00,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:32:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:32:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:32:00,273 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2018-09-30 10:32:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:00,333 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-09-30 10:32:00,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:32:00,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 10:32:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:00,334 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:32:00,335 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:32:00,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:32:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:32:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:32:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:32:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-30 10:32:00,341 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-30 10:32:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:00,342 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-30 10:32:00,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:32:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-30 10:32:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:32:00,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:00,343 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1] [2018-09-30 10:32:00,343 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:00,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:00,343 INFO L82 PathProgramCache]: Analyzing trace with hash 591459411, now seen corresponding path program 9 times [2018-09-30 10:32:00,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:00,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:00,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:00,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:00,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:00,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:00,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:00,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:00,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:32:00,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:00,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:00,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:00,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:32:00,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:32:00,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:32:00,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:32:00,704 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2018-09-30 10:32:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:00,956 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-09-30 10:32:00,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:32:00,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-30 10:32:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:00,958 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:32:00,958 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:32:00,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:32:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:32:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:32:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:32:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-30 10:32:00,962 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2018-09-30 10:32:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:00,962 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-30 10:32:00,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:32:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-30 10:32:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:32:00,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:00,963 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1] [2018-09-30 10:32:00,963 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:00,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910391, now seen corresponding path program 14 times [2018-09-30 10:32:00,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:00,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:00,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:01,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:01,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:01,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:01,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:01,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:01,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:01,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:01,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:32:01,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:32:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:32:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:32:01,178 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2018-09-30 10:32:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:01,211 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-09-30 10:32:01,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:32:01,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-09-30 10:32:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:01,212 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:32:01,213 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:32:01,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:32:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:32:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:32:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:32:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 10:32:01,216 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-30 10:32:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:01,217 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 10:32:01,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:32:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 10:32:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:32:01,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:01,217 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1] [2018-09-30 10:32:01,218 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:01,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:01,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2083910329, now seen corresponding path program 10 times [2018-09-30 10:32:01,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:01,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:01,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:01,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:01,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:01,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:01,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:01,479 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:01,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:01,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:01,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:01,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:32:01,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:32:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:32:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:32:01,520 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 18 states. [2018-09-30 10:32:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:01,592 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-09-30 10:32:01,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:32:01,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-09-30 10:32:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:01,593 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:32:01,593 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:32:01,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:32:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:32:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:32:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:32:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 10:32:01,597 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2018-09-30 10:32:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:01,597 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 10:32:01,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:32:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 10:32:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:32:01,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:01,598 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1] [2018-09-30 10:32:01,598 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:01,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1979244437, now seen corresponding path program 15 times [2018-09-30 10:32:01,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:01,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:01,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:01,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:02,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:02,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:02,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:02,328 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 10:32:02,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:02,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:02,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:02,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 10:32:02,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:32:02,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:32:02,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:32:02,664 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 35 states. [2018-09-30 10:32:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:03,837 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-30 10:32:03,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:32:03,838 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2018-09-30 10:32:03,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:03,839 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:32:03,839 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:32:03,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:32:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:32:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:32:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:32:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-30 10:32:03,848 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-09-30 10:32:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:03,849 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-30 10:32:03,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:32:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-30 10:32:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:32:03,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:03,849 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1] [2018-09-30 10:32:03,850 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:03,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:03,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545079, now seen corresponding path program 16 times [2018-09-30 10:32:03,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:03,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:03,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:03,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:03,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:04,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:04,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:04,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:04,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:04,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:04,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:04,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:04,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:32:04,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:32:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:32:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:32:04,085 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 19 states. [2018-09-30 10:32:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:04,155 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-09-30 10:32:04,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:32:04,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-09-30 10:32:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:04,156 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:32:04,156 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:32:04,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:32:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:32:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:32:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:32:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 10:32:04,160 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-30 10:32:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:04,160 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 10:32:04,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:32:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 10:32:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:32:04,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:04,161 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1] [2018-09-30 10:32:04,161 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:04,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1933545017, now seen corresponding path program 11 times [2018-09-30 10:32:04,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:04,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:04,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:04,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:04,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:04,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:04,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:04,471 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:04,499 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:32:04,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:04,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:04,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:04,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:32:04,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:32:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:32:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:32:04,542 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2018-09-30 10:32:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:04,623 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2018-09-30 10:32:04,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:32:04,624 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2018-09-30 10:32:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:04,624 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:32:04,625 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:32:04,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:32:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:32:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:32:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:32:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-30 10:32:04,629 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2018-09-30 10:32:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:04,629 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-30 10:32:04,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:32:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-30 10:32:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:32:04,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:04,630 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1] [2018-09-30 10:32:04,630 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:04,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:04,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364501, now seen corresponding path program 17 times [2018-09-30 10:32:04,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:04,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:04,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:04,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:04,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:04,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:04,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:04,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:04,930 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:32:04,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:04,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:04,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:04,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:32:04,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:32:04,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:32:04,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:32:04,974 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 20 states. [2018-09-30 10:32:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:05,061 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-09-30 10:32:05,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:32:05,062 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-09-30 10:32:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:05,063 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:32:05,063 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:32:05,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:32:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:32:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:32:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:32:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 10:32:05,067 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-30 10:32:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:05,068 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 10:32:05,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:32:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 10:32:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:32:05,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:05,068 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1] [2018-09-30 10:32:05,068 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:05,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:05,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1861364563, now seen corresponding path program 12 times [2018-09-30 10:32:05,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:05,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:05,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:05,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:05,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:05,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:05,430 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:05,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:32:05,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:05,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:05,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:05,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:32:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:32:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:32:05,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:32:05,504 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 21 states. [2018-09-30 10:32:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:05,616 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2018-09-30 10:32:05,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:32:05,617 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2018-09-30 10:32:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:05,618 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:32:05,618 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:32:05,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:32:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:32:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:32:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:32:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-30 10:32:05,622 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2018-09-30 10:32:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:05,622 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-30 10:32:05,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:32:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-30 10:32:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:32:05,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:05,623 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1] [2018-09-30 10:32:05,623 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:05,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash -411470327, now seen corresponding path program 18 times [2018-09-30 10:32:05,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:05,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:05,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:05,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:05,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:05,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:05,977 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:06,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 10:32:06,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:06,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:06,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:06,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 10:32:06,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:32:06,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:32:06,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:32:06,411 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2018-09-30 10:32:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:07,725 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-09-30 10:32:07,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:32:07,725 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2018-09-30 10:32:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:07,726 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:32:07,726 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:32:07,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:32:07,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:32:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:32:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:32:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-30 10:32:07,733 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2018-09-30 10:32:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:07,733 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-30 10:32:07,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:32:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-30 10:32:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:32:07,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:07,734 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1] [2018-09-30 10:32:07,734 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:07,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash -274409835, now seen corresponding path program 19 times [2018-09-30 10:32:07,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:07,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:07,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:07,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:07,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:08,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:08,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 20 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:08,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:32:08,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:32:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:32:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:32:08,266 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 22 states. [2018-09-30 10:32:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:08,306 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-09-30 10:32:08,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:32:08,307 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-09-30 10:32:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:08,308 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:32:08,308 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:32:08,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:32:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:32:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:32:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:32:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-30 10:32:08,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-30 10:32:08,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:08,313 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-30 10:32:08,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:32:08,313 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-30 10:32:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:32:08,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:08,314 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1] [2018-09-30 10:32:08,314 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:08,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -274409773, now seen corresponding path program 13 times [2018-09-30 10:32:08,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:08,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:08,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:08,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:08,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:08,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:08,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:32:08,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:32:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:32:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:32:08,622 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 23 states. [2018-09-30 10:32:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:08,685 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2018-09-30 10:32:08,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:32:08,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2018-09-30 10:32:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:08,687 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:32:08,687 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:32:08,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:32:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:32:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:32:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:32:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-30 10:32:08,690 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2018-09-30 10:32:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:08,691 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-30 10:32:08,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:32:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-30 10:32:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:32:08,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:08,692 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1] [2018-09-30 10:32:08,692 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:08,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191159, now seen corresponding path program 20 times [2018-09-30 10:32:08,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:08,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:08,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:08,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:08,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:08,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:08,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:08,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:08,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 21 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:09,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:09,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:32:09,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:32:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:32:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:32:09,001 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2018-09-30 10:32:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:09,045 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-09-30 10:32:09,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:32:09,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-09-30 10:32:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:09,046 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:32:09,046 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:32:09,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:32:09,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:32:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:32:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:32:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-30 10:32:09,050 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-30 10:32:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:09,051 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-30 10:32:09,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:32:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-30 10:32:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:32:09,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:09,052 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1] [2018-09-30 10:32:09,052 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:09,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1619191097, now seen corresponding path program 14 times [2018-09-30 10:32:09,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:09,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:09,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:09,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:09,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:09,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:09,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:09,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:09,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:09,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:09,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:09,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:09,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:32:09,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:32:09,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:32:09,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:32:09,766 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 24 states. [2018-09-30 10:32:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:09,851 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2018-09-30 10:32:09,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:32:09,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2018-09-30 10:32:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:09,853 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:32:09,853 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:32:09,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:32:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:32:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:32:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:32:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 10:32:09,857 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2018-09-30 10:32:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:09,857 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 10:32:09,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:32:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 10:32:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:32:09,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:09,858 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1] [2018-09-30 10:32:09,858 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:09,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash -544677355, now seen corresponding path program 21 times [2018-09-30 10:32:09,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:09,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:09,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:09,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:09,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 22 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:10,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:10,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:10,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:10,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 10:32:10,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:10,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:10,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:10,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 10:32:10,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:32:10,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:32:10,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:32:10,707 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 47 states. [2018-09-30 10:32:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:11,820 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-09-30 10:32:11,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:32:11,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 68 [2018-09-30 10:32:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:11,822 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:32:11,822 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:32:11,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:32:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:32:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:32:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:32:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 10:32:11,827 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2018-09-30 10:32:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:11,828 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 10:32:11,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:32:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 10:32:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:32:11,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:11,828 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2018-09-30 10:32:11,829 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:11,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash -95199479, now seen corresponding path program 22 times [2018-09-30 10:32:11,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:11,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:11,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:11,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:11,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:12,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:12,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:12,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:12,189 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:12,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:12,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:12,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:12,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 10:32:12,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:32:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:32:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:32:12,944 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 49 states. [2018-09-30 10:32:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:14,178 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-09-30 10:32:14,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:32:14,179 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2018-09-30 10:32:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:14,180 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:32:14,180 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:32:14,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2878, Invalid=6052, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:32:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:32:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:32:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:32:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 10:32:14,187 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2018-09-30 10:32:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:14,187 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 10:32:14,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:32:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 10:32:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:32:14,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:14,188 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1] [2018-09-30 10:32:14,188 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:14,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824491, now seen corresponding path program 23 times [2018-09-30 10:32:14,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:14,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:14,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:14,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:14,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:14,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:14,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:14,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:14,551 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:32:14,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:14,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 24 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:14,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:14,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:32:14,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:32:14,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:32:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:32:14,590 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2018-09-30 10:32:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:14,694 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-09-30 10:32:14,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:32:14,695 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-09-30 10:32:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:14,696 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:32:14,696 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:32:14,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:32:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:32:14,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:32:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:32:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-30 10:32:14,700 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-30 10:32:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:14,701 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-30 10:32:14,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:32:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-30 10:32:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:32:14,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:14,702 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1] [2018-09-30 10:32:14,702 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:14,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824429, now seen corresponding path program 15 times [2018-09-30 10:32:14,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:14,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:14,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:14,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:14,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:15,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:15,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:15,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:15,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-30 10:32:15,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:15,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:15,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:15,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:32:15,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:32:15,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:32:15,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:32:15,158 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 27 states. [2018-09-30 10:32:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:15,267 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-09-30 10:32:15,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:32:15,268 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2018-09-30 10:32:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:15,269 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:32:15,269 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:32:15,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:32:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:32:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:32:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:32:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-30 10:32:15,275 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2018-09-30 10:32:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:15,275 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-30 10:32:15,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:32:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-30 10:32:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:32:15,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:15,276 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1] [2018-09-30 10:32:15,277 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:15,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash -142326903, now seen corresponding path program 24 times [2018-09-30 10:32:15,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:15,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:15,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:15,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:15,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 25 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:15,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:15,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:15,846 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:15,889 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 10:32:15,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:15,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:16,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:16,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 10:32:16,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:32:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:32:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:32:16,432 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 53 states. [2018-09-30 10:32:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:18,074 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2018-09-30 10:32:18,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:32:18,075 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 77 [2018-09-30 10:32:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:18,076 INFO L225 Difference]: With dead ends: 86 [2018-09-30 10:32:18,076 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:32:18,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3378, Invalid=7128, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:32:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:32:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:32:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:32:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-30 10:32:18,081 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2018-09-30 10:32:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:18,082 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-30 10:32:18,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:32:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-30 10:32:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:32:18,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:18,082 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1] [2018-09-30 10:32:18,082 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:18,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash -926607083, now seen corresponding path program 25 times [2018-09-30 10:32:18,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:18,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:18,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:18,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:18,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:18,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:18,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:18,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:18,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 26 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:18,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:18,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:32:18,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:32:18,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:32:18,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:32:18,791 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 28 states. [2018-09-30 10:32:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:18,861 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-09-30 10:32:18,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:32:18,861 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-09-30 10:32:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:18,862 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:32:18,863 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:32:18,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:32:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:32:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:32:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:32:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-30 10:32:18,867 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-30 10:32:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:18,867 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-30 10:32:18,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:32:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-30 10:32:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:32:18,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:18,868 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1] [2018-09-30 10:32:18,868 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:18,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:18,868 INFO L82 PathProgramCache]: Analyzing trace with hash -926607021, now seen corresponding path program 16 times [2018-09-30 10:32:18,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:18,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:18,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:18,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:18,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:19,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:19,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:19,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:19,269 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:19,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:19,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:19,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:19,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:32:19,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:32:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:32:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:32:19,302 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 29 states. [2018-09-30 10:32:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:19,367 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-09-30 10:32:19,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:32:19,367 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2018-09-30 10:32:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:19,368 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:32:19,368 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:32:19,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:32:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:32:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:32:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:32:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-30 10:32:19,373 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2018-09-30 10:32:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:19,373 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-30 10:32:19,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:32:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-30 10:32:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:32:19,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:19,374 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1] [2018-09-30 10:32:19,374 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:19,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash -795359223, now seen corresponding path program 26 times [2018-09-30 10:32:19,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:19,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:19,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:19,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:19,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:20,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:20,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:20,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:20,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:20,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:20,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 27 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:20,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:20,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:32:20,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:32:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:32:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:32:20,363 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 29 states. [2018-09-30 10:32:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:20,411 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-09-30 10:32:20,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:32:20,411 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-09-30 10:32:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:20,412 INFO L225 Difference]: With dead ends: 90 [2018-09-30 10:32:20,412 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:32:20,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:32:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:32:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:32:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:32:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-30 10:32:20,416 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-30 10:32:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:20,417 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-30 10:32:20,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:32:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-30 10:32:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:32:20,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:20,418 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1] [2018-09-30 10:32:20,418 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:20,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:20,418 INFO L82 PathProgramCache]: Analyzing trace with hash -795359161, now seen corresponding path program 17 times [2018-09-30 10:32:20,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:20,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:20,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:20,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:20,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:21,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:21,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:21,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:21,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:32:21,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:21,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:21,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:21,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:32:21,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:32:21,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:32:21,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:32:21,337 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 30 states. [2018-09-30 10:32:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:21,388 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2018-09-30 10:32:21,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:32:21,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2018-09-30 10:32:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:21,390 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:32:21,390 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:32:21,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:32:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:32:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:32:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:32:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-30 10:32:21,393 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2018-09-30 10:32:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:21,394 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-30 10:32:21,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:32:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-30 10:32:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:32:21,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:21,394 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1] [2018-09-30 10:32:21,394 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:21,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:21,395 INFO L82 PathProgramCache]: Analyzing trace with hash 789398677, now seen corresponding path program 27 times [2018-09-30 10:32:21,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:21,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:21,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:21,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:21,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 28 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:21,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:21,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:21,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:21,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 10:32:21,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:21,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:22,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:22,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 10:32:22,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:32:22,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:32:22,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:32:22,486 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 59 states. [2018-09-30 10:32:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:24,415 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-09-30 10:32:24,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:32:24,416 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 86 [2018-09-30 10:32:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:24,417 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:32:24,417 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:32:24,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4203, Invalid=8907, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 10:32:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:32:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:32:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:32:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 10:32:24,424 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-30 10:32:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:24,424 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 10:32:24,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:32:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 10:32:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:32:24,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:24,425 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1] [2018-09-30 10:32:24,425 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:24,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2031479945, now seen corresponding path program 28 times [2018-09-30 10:32:24,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:24,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:24,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:24,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:24,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:24,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:24,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:24,859 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:24,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:24,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 29 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:24,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:24,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:32:24,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:32:24,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:32:24,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:32:24,893 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 31 states. [2018-09-30 10:32:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:25,010 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2018-09-30 10:32:25,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:32:25,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-09-30 10:32:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:25,012 INFO L225 Difference]: With dead ends: 96 [2018-09-30 10:32:25,012 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:32:25,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:32:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:32:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:32:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:32:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-30 10:32:25,016 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-30 10:32:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:25,016 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-30 10:32:25,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:32:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-30 10:32:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:32:25,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:25,017 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1] [2018-09-30 10:32:25,017 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:25,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2031480007, now seen corresponding path program 18 times [2018-09-30 10:32:25,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:25,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:25,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:25,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:25,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:25,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:25,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:25,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:25,633 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 10:32:25,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:25,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:25,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:25,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:32:25,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:32:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:32:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:32:25,687 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 32 states. [2018-09-30 10:32:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:26,029 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2018-09-30 10:32:26,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:32:26,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2018-09-30 10:32:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:26,030 INFO L225 Difference]: With dead ends: 98 [2018-09-30 10:32:26,030 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:32:26,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:32:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:32:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:32:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:32:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 10:32:26,036 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2018-09-30 10:32:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:26,036 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 10:32:26,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:32:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 10:32:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:32:26,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:26,037 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1] [2018-09-30 10:32:26,037 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:26,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash -563687403, now seen corresponding path program 29 times [2018-09-30 10:32:26,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:26,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:26,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:26,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:26,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:26,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:26,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:26,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:32:26,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:26,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 30 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:26,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:26,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:32:26,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:32:26,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:32:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:32:26,796 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 32 states. [2018-09-30 10:32:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:26,904 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-09-30 10:32:26,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:32:26,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-09-30 10:32:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:26,905 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:32:26,905 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:32:26,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:32:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:32:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:32:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:32:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-30 10:32:26,912 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-30 10:32:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:26,912 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-30 10:32:26,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:32:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-30 10:32:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:32:26,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:26,913 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1] [2018-09-30 10:32:26,913 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:26,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash -563687341, now seen corresponding path program 19 times [2018-09-30 10:32:26,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:26,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:26,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:26,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:28,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:28,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:28,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:28,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:28,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:28,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:32:28,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:32:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:32:28,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:32:28,629 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2018-09-30 10:32:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:28,730 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2018-09-30 10:32:28,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:32:28,731 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2018-09-30 10:32:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:28,732 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:32:28,732 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:32:28,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:32:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:32:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:32:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:32:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-30 10:32:28,737 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2018-09-30 10:32:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:28,737 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-30 10:32:28,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:32:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-30 10:32:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:32:28,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:28,738 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1] [2018-09-30 10:32:28,738 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:28,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash 512143625, now seen corresponding path program 30 times [2018-09-30 10:32:28,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:28,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:28,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 31 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:29,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:29,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:29,419 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:29,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-30 10:32:29,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:29,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:30,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:30,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 10:32:30,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:32:30,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:32:30,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:32:30,356 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 65 states. [2018-09-30 10:32:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:32,431 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-09-30 10:32:32,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:32:32,431 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 95 [2018-09-30 10:32:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:32,433 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:32:32,433 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:32:32,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5118, Invalid=10884, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 10:32:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:32:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:32:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:32:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-30 10:32:32,438 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2018-09-30 10:32:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:32,438 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-30 10:32:32,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:32:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-30 10:32:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:32:32,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:32,439 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1] [2018-09-30 10:32:32,440 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:32,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:32,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336021, now seen corresponding path program 31 times [2018-09-30 10:32:32,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:32,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:32,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:32,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:32,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:33,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:33,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:33,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:33,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 32 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:33,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:33,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:32:33,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:32:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:32:33,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:32:33,367 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 34 states. [2018-09-30 10:32:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:33,413 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2018-09-30 10:32:33,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:32:33,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-09-30 10:32:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:33,415 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:32:33,415 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:32:33,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:32:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:32:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:32:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:32:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 10:32:33,420 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-30 10:32:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:33,421 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 10:32:33,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:32:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 10:32:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:32:33,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:33,421 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1] [2018-09-30 10:32:33,422 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:33,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1548336083, now seen corresponding path program 20 times [2018-09-30 10:32:33,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:33,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:33,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:33,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:33,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:33,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:33,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:33,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:33,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:33,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:33,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:34,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:34,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:32:34,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:32:34,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:32:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:32:34,024 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2018-09-30 10:32:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:34,100 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-09-30 10:32:34,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:32:34,100 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 98 [2018-09-30 10:32:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:34,101 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:32:34,101 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:32:34,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:32:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:32:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:32:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:32:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-30 10:32:34,105 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2018-09-30 10:32:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:34,106 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-30 10:32:34,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:32:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-30 10:32:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:32:34,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:34,107 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1] [2018-09-30 10:32:34,107 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:34,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918391, now seen corresponding path program 32 times [2018-09-30 10:32:34,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:34,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:34,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:34,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:34,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:35,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:35,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:35,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:35,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:35,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:35,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 33 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:35,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:35,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:32:35,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:32:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:32:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:32:35,143 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 35 states. [2018-09-30 10:32:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:35,625 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-09-30 10:32:35,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:32:35,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-09-30 10:32:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:35,627 INFO L225 Difference]: With dead ends: 108 [2018-09-30 10:32:35,627 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:32:35,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:32:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:32:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:32:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:32:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-30 10:32:35,632 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-30 10:32:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:35,632 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-30 10:32:35,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:32:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-30 10:32:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:32:35,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:35,633 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1] [2018-09-30 10:32:35,633 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:35,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1468918329, now seen corresponding path program 21 times [2018-09-30 10:32:35,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:35,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:35,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:35,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:35,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:36,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:36,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:36,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:36,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:32:36,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:36,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:36,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:36,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:32:36,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:32:36,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:32:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:32:36,410 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 36 states. [2018-09-30 10:32:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:36,570 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2018-09-30 10:32:36,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:32:36,571 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2018-09-30 10:32:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:36,572 INFO L225 Difference]: With dead ends: 110 [2018-09-30 10:32:36,572 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:32:36,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:32:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:32:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:32:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:32:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-30 10:32:36,578 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2018-09-30 10:32:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:36,578 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-30 10:32:36,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:32:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-30 10:32:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:32:36,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:36,579 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1] [2018-09-30 10:32:36,579 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:36,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash 875431701, now seen corresponding path program 33 times [2018-09-30 10:32:36,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:36,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:36,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:36,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:36,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 34 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:37,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:37,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:37,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:37,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-30 10:32:37,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:37,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:38,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:38,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 10:32:38,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:32:38,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:32:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:32:38,808 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 71 states. [2018-09-30 10:32:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:41,057 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2018-09-30 10:32:41,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:32:41,058 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 104 [2018-09-30 10:32:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:41,059 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:32:41,059 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:32:41,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6123, Invalid=13059, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 10:32:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:32:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:32:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:32:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-30 10:32:41,065 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2018-09-30 10:32:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:41,065 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-30 10:32:41,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:32:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-30 10:32:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:32:41,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:41,066 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1] [2018-09-30 10:32:41,066 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:41,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:41,066 INFO L82 PathProgramCache]: Analyzing trace with hash 945822217, now seen corresponding path program 34 times [2018-09-30 10:32:41,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:41,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:41,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:41,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:41,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:41,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:41,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:41,585 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:41,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:41,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:41,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 35 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:41,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:41,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:32:41,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:32:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:32:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:32:41,654 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 37 states. [2018-09-30 10:32:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:42,202 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2018-09-30 10:32:42,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:32:42,203 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-09-30 10:32:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:42,204 INFO L225 Difference]: With dead ends: 114 [2018-09-30 10:32:42,204 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:32:42,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:32:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:32:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:32:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:32:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-30 10:32:42,207 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-30 10:32:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:42,208 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-30 10:32:42,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:32:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-30 10:32:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:32:42,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:42,209 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1] [2018-09-30 10:32:42,209 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:42,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 945822279, now seen corresponding path program 22 times [2018-09-30 10:32:42,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:42,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:42,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:42,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:42,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:44,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:44,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:44,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:44,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:44,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:44,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:44,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:44,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:32:44,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:32:44,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:32:44,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:32:44,164 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 38 states. [2018-09-30 10:32:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:44,221 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-30 10:32:44,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:32:44,222 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2018-09-30 10:32:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:44,223 INFO L225 Difference]: With dead ends: 116 [2018-09-30 10:32:44,223 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 10:32:44,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:32:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 10:32:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 10:32:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:32:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 10:32:44,227 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-30 10:32:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:44,227 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 10:32:44,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:32:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 10:32:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:32:44,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:44,228 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1] [2018-09-30 10:32:44,228 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:44,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:44,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643925, now seen corresponding path program 35 times [2018-09-30 10:32:44,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:44,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:44,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:44,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:44,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:45,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:45,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:45,022 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:45,084 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:32:45,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:45,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 36 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:45,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:45,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:32:45,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:32:45,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:32:45,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:32:45,131 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 38 states. [2018-09-30 10:32:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:45,241 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-09-30 10:32:45,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:32:45,241 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-09-30 10:32:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:45,242 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:32:45,242 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:32:45,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:32:45,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:32:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:32:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:32:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-30 10:32:45,246 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-30 10:32:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:45,246 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-30 10:32:45,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:32:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-30 10:32:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:32:45,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:45,247 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1] [2018-09-30 10:32:45,247 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:45,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:45,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2005643987, now seen corresponding path program 23 times [2018-09-30 10:32:45,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:45,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:45,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:45,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:45,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:46,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:46,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:46,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:46,106 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:32:46,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:46,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:46,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:46,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:32:46,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:32:46,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:32:46,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:32:46,153 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 39 states. [2018-09-30 10:32:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:46,250 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2018-09-30 10:32:46,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:32:46,251 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2018-09-30 10:32:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:46,252 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:32:46,252 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:32:46,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:32:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:32:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:32:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:32:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 10:32:46,255 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2018-09-30 10:32:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:46,256 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 10:32:46,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:32:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 10:32:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 10:32:46,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:46,256 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1] [2018-09-30 10:32:46,257 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:46,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1445413239, now seen corresponding path program 36 times [2018-09-30 10:32:46,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:46,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:46,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:46,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:46,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 37 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:47,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:47,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:47,231 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:47,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 10:32:47,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:47,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:48,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:48,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 10:32:48,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:32:48,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:32:48,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:32:48,829 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 77 states. [2018-09-30 10:32:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:51,627 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2018-09-30 10:32:51,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:32:51,627 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 113 [2018-09-30 10:32:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:51,628 INFO L225 Difference]: With dead ends: 122 [2018-09-30 10:32:51,628 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 10:32:51,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7218, Invalid=15432, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 10:32:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 10:32:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 10:32:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 10:32:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-30 10:32:51,633 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2018-09-30 10:32:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:51,633 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-30 10:32:51,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:32:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-30 10:32:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:32:51,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:51,634 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1] [2018-09-30 10:32:51,634 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:51,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745685, now seen corresponding path program 37 times [2018-09-30 10:32:51,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:51,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:51,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:51,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:51,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:52,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:52,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:52,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:52,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 38 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:52,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:52,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:32:52,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:32:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:32:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:32:52,444 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 40 states. [2018-09-30 10:32:53,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:53,483 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2018-09-30 10:32:53,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:32:53,483 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-09-30 10:32:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:53,484 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:32:53,484 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:32:53,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:32:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:32:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:32:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:32:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 10:32:53,488 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-30 10:32:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:53,489 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 10:32:53,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:32:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 10:32:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:32:53,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:53,490 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1] [2018-09-30 10:32:53,490 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:53,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1037745747, now seen corresponding path program 24 times [2018-09-30 10:32:53,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:53,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:53,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:53,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:53,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:54,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:54,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:54,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:54,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-09-30 10:32:54,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:54,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:54,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:54,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:32:54,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:32:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:32:54,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:32:54,706 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 41 states. [2018-09-30 10:32:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:54,785 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2018-09-30 10:32:54,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:32:54,786 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 116 [2018-09-30 10:32:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:54,787 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:32:54,787 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:32:54,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:32:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:32:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 10:32:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:32:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-30 10:32:54,793 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2018-09-30 10:32:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:54,793 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-30 10:32:54,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:32:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-30 10:32:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 10:32:54,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:54,794 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1] [2018-09-30 10:32:54,794 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:54,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash 308544265, now seen corresponding path program 38 times [2018-09-30 10:32:54,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:54,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:54,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:54,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:54,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:56,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:56,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:56,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:56,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:56,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:56,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 39 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:56,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:56,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:32:56,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:32:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:32:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:32:56,439 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 41 states. [2018-09-30 10:32:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:56,537 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-09-30 10:32:56,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:32:56,538 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-09-30 10:32:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:56,539 INFO L225 Difference]: With dead ends: 126 [2018-09-30 10:32:56,539 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 10:32:56,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:32:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 10:32:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 10:32:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 10:32:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-30 10:32:56,544 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 119 [2018-09-30 10:32:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:56,544 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-30 10:32:56,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:32:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-30 10:32:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 10:32:56,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:56,545 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1] [2018-09-30 10:32:56,545 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:56,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:56,546 INFO L82 PathProgramCache]: Analyzing trace with hash 308544327, now seen corresponding path program 25 times [2018-09-30 10:32:56,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:56,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:56,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:56,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:56,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:57,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:57,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:57,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:57,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:57,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:57,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:32:57,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:32:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:32:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:32:57,580 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 42 states. [2018-09-30 10:32:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:57,708 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-09-30 10:32:57,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:32:57,709 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 119 [2018-09-30 10:32:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:57,710 INFO L225 Difference]: With dead ends: 128 [2018-09-30 10:32:57,710 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 10:32:57,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:32:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 10:32:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 10:32:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 10:32:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-09-30 10:32:57,713 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2018-09-30 10:32:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:57,713 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-09-30 10:32:57,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:32:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-09-30 10:32:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:32:57,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:57,714 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1] [2018-09-30 10:32:57,714 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:57,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash 613624213, now seen corresponding path program 39 times [2018-09-30 10:32:57,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:57,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:57,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 40 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:58,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:58,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:58,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:58,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-30 10:32:58,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:58,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:59,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:59,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 10:32:59,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:32:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:32:59,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:32:59,919 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 83 states. [2018-09-30 10:33:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:03,115 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-09-30 10:33:03,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:33:03,115 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 122 [2018-09-30 10:33:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:03,116 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:33:03,117 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 10:33:03,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4759 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8403, Invalid=18003, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 10:33:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 10:33:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 10:33:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 10:33:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-30 10:33:03,121 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2018-09-30 10:33:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:03,121 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-30 10:33:03,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:33:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-30 10:33:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 10:33:03,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:03,122 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1] [2018-09-30 10:33:03,123 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:03,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556745, now seen corresponding path program 40 times [2018-09-30 10:33:03,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:03,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:03,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:03,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:03,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:04,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:04,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:04,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:04,170 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:04,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:04,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 41 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:04,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:04,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:33:04,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:33:04,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:33:04,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:33:04,227 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 43 states. [2018-09-30 10:33:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:04,382 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-09-30 10:33:04,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:33:04,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-09-30 10:33:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:04,383 INFO L225 Difference]: With dead ends: 132 [2018-09-30 10:33:04,384 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 10:33:04,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:33:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 10:33:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 10:33:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 10:33:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2018-09-30 10:33:04,389 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2018-09-30 10:33:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:04,389 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2018-09-30 10:33:04,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:33:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2018-09-30 10:33:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 10:33:04,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:04,390 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1] [2018-09-30 10:33:04,391 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:04,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:04,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1099556807, now seen corresponding path program 26 times [2018-09-30 10:33:04,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:04,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:04,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:04,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:05,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:05,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:05,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:05,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:05,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:05,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:05,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:05,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:33:05,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:33:05,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:33:05,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:33:05,190 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 44 states. [2018-09-30 10:33:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:05,946 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2018-09-30 10:33:05,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:33:05,947 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 125 [2018-09-30 10:33:05,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:05,948 INFO L225 Difference]: With dead ends: 134 [2018-09-30 10:33:05,948 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 10:33:05,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:33:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 10:33:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 10:33:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 10:33:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-30 10:33:05,953 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2018-09-30 10:33:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:05,953 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-30 10:33:05,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:33:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-30 10:33:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:33:05,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:05,954 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1] [2018-09-30 10:33:05,954 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:05,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:05,955 INFO L82 PathProgramCache]: Analyzing trace with hash -819137259, now seen corresponding path program 41 times [2018-09-30 10:33:05,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:05,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:05,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:05,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:05,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:08,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:08,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:08,384 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:08,460 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 10:33:08,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:08,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 42 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:08,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:08,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:33:08,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:33:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:33:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:33:08,521 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 44 states. [2018-09-30 10:33:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:09,340 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2018-09-30 10:33:09,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:33:09,341 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-09-30 10:33:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:09,342 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:33:09,342 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:33:09,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:33:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:33:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:33:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:33:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-30 10:33:09,346 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-30 10:33:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:09,347 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-30 10:33:09,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:33:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-30 10:33:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:33:09,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:09,347 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1] [2018-09-30 10:33:09,348 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:09,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash -819137197, now seen corresponding path program 27 times [2018-09-30 10:33:09,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:09,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:09,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:09,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:09,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:10,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:10,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:10,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2018-09-30 10:33:10,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:10,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:10,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:33:10,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:33:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:33:10,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:33:10,292 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 45 states. [2018-09-30 10:33:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:10,421 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2018-09-30 10:33:10,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:33:10,422 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2018-09-30 10:33:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:10,423 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:33:10,423 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:33:10,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:33:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:33:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:33:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:33:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 10:33:10,426 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-30 10:33:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:10,427 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 10:33:10,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:33:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 10:33:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 10:33:10,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:10,427 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1] [2018-09-30 10:33:10,428 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:10,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1087532041, now seen corresponding path program 42 times [2018-09-30 10:33:10,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:10,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:10,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:10,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 43 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:11,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:11,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:11,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:11,452 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-30 10:33:11,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:11,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:13,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 10:33:13,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:33:13,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:33:13,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:33:13,029 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 89 states. [2018-09-30 10:33:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:16,938 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2018-09-30 10:33:16,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:33:16,939 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 131 [2018-09-30 10:33:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:16,940 INFO L225 Difference]: With dead ends: 140 [2018-09-30 10:33:16,940 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 10:33:16,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9678, Invalid=20772, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 10:33:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 10:33:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 10:33:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 10:33:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 10:33:16,945 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2018-09-30 10:33:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:16,945 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 10:33:16,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:33:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 10:33:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:33:16,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:16,946 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1] [2018-09-30 10:33:16,946 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:16,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158741, now seen corresponding path program 43 times [2018-09-30 10:33:16,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:16,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:16,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:16,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:17,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:17,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:17,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 44 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:17,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:17,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:33:17,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:33:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:33:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:33:17,799 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 46 states. [2018-09-30 10:33:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:17,886 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2018-09-30 10:33:17,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:33:17,887 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-09-30 10:33:17,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:17,888 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:33:17,888 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:33:17,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:33:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:33:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 10:33:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:33:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-30 10:33:17,892 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-30 10:33:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:17,893 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-30 10:33:17,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:33:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-30 10:33:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:33:17,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:17,893 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1] [2018-09-30 10:33:17,893 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:17,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1730158803, now seen corresponding path program 28 times [2018-09-30 10:33:17,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:17,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:17,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:17,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:18,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:18,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:18,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:18,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:18,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:18,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:18,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:33:18,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:33:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:33:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:33:18,917 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 47 states. [2018-09-30 10:33:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:19,019 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2018-09-30 10:33:19,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:33:19,019 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2018-09-30 10:33:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:19,020 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:33:19,020 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:33:19,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:33:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:33:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:33:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:33:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-30 10:33:19,025 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2018-09-30 10:33:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:19,026 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-30 10:33:19,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:33:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-30 10:33:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 10:33:19,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:19,027 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1] [2018-09-30 10:33:19,027 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:19,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash -742027127, now seen corresponding path program 44 times [2018-09-30 10:33:19,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:19,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:19,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:19,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:19,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:19,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:19,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:19,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:19,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 45 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:19,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:19,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:33:19,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:33:19,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:33:19,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:33:19,997 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 47 states. [2018-09-30 10:33:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,250 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2018-09-30 10:33:20,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:33:20,251 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-09-30 10:33:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,252 INFO L225 Difference]: With dead ends: 144 [2018-09-30 10:33:20,252 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 10:33:20,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:33:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 10:33:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 10:33:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 10:33:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-30 10:33:20,257 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2018-09-30 10:33:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,258 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-30 10:33:20,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:33:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-30 10:33:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 10:33:20,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,259 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1] [2018-09-30 10:33:20,259 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash -742027065, now seen corresponding path program 29 times [2018-09-30 10:33:20,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:20,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:21,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:21,089 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:21,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 10:33:21,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:21,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 3015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:21,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:21,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:33:21,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:33:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:33:21,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:33:21,217 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 48 states. [2018-09-30 10:33:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:21,343 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2018-09-30 10:33:21,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:33:21,343 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 137 [2018-09-30 10:33:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:21,344 INFO L225 Difference]: With dead ends: 146 [2018-09-30 10:33:21,344 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 10:33:21,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:33:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 10:33:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 10:33:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 10:33:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-09-30 10:33:21,350 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2018-09-30 10:33:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:21,350 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-09-30 10:33:21,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:33:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-09-30 10:33:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:33:21,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:21,352 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1] [2018-09-30 10:33:21,352 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:21,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash 467971093, now seen corresponding path program 45 times [2018-09-30 10:33:21,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:21,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:22,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:22,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:22,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-30 10:33:22,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:22,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 46 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:22,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:22,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:33:22,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:33:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:33:22,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:33:22,338 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 48 states. [2018-09-30 10:33:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:22,408 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2018-09-30 10:33:22,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:33:22,409 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-09-30 10:33:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:22,410 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:33:22,410 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 10:33:22,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:33:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 10:33:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 10:33:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 10:33:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-30 10:33:22,414 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-30 10:33:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:22,414 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-30 10:33:22,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:33:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-30 10:33:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:33:22,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:22,415 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1] [2018-09-30 10:33:22,415 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:22,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:22,416 INFO L82 PathProgramCache]: Analyzing trace with hash 467971155, now seen corresponding path program 30 times [2018-09-30 10:33:22,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:22,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:22,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:22,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:23,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:23,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-30 10:33:23,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:23,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:33:23,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:33:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:33:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:33:23,457 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 49 states. [2018-09-30 10:33:23,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,575 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-30 10:33:23,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:33:23,575 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2018-09-30 10:33:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,577 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:33:23,577 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 10:33:23,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:33:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 10:33:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 10:33:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 10:33:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-30 10:33:23,582 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2018-09-30 10:33:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,583 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-30 10:33:23,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:33:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-30 10:33:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 10:33:23,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,584 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2018-09-30 10:33:23,584 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash -135572215, now seen corresponding path program 46 times [2018-09-30 10:33:23,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 47 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:24,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:24,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:24,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:24,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:24,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:24,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:26,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 10:33:26,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:33:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:33:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:33:26,712 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 97 states. [2018-09-30 10:33:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:31,282 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2018-09-30 10:33:31,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:33:31,282 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 143 [2018-09-30 10:33:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:31,284 INFO L225 Difference]: With dead ends: 152 [2018-09-30 10:33:31,284 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 10:33:31,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6579 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11518, Invalid=24772, Unknown=0, NotChecked=0, Total=36290 [2018-09-30 10:33:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 10:33:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 10:33:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 10:33:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2018-09-30 10:33:31,288 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2018-09-30 10:33:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:31,288 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2018-09-30 10:33:31,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:33:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2018-09-30 10:33:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:33:31,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:31,289 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1] [2018-09-30 10:33:31,289 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:31,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159787, now seen corresponding path program 47 times [2018-09-30 10:33:31,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:31,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:31,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:31,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:32,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:32,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:32,297 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:33:32,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:32,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 48 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:32,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:32,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:33:32,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:33:32,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:33:32,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:33:32,355 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 50 states. [2018-09-30 10:33:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:32,433 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2018-09-30 10:33:32,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:33:32,434 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-09-30 10:33:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:32,435 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:33:32,435 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:33:32,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:33:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:33:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 10:33:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 10:33:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-30 10:33:32,438 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-30 10:33:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:32,439 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-30 10:33:32,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:33:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-30 10:33:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:33:32,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:32,439 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1] [2018-09-30 10:33:32,440 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:32,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:32,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1561159725, now seen corresponding path program 31 times [2018-09-30 10:33:32,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:32,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:32,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:32,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:33,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:33,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:33,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:33:33,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:33:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:33:33,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:33:33,442 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2018-09-30 10:33:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:33,574 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-09-30 10:33:33,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:33:33,575 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2018-09-30 10:33:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:33,576 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:33:33,576 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 10:33:33,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:33:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 10:33:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 10:33:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 10:33:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-30 10:33:33,583 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2018-09-30 10:33:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,583 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-30 10:33:33,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:33:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-30 10:33:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 10:33:33,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,584 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1] [2018-09-30 10:33:33,584 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1691072905, now seen corresponding path program 48 times [2018-09-30 10:33:33,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:33,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 49 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:34,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:34,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:34,818 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:34,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 10:33:34,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:34,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:36,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:36,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 10:33:36,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:33:36,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:33:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:33:36,728 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 101 states. [2018-09-30 10:33:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:41,563 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2018-09-30 10:33:41,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:33:41,563 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 149 [2018-09-30 10:33:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:41,565 INFO L225 Difference]: With dead ends: 158 [2018-09-30 10:33:41,565 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 10:33:41,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7153 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12498, Invalid=26904, Unknown=0, NotChecked=0, Total=39402 [2018-09-30 10:33:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 10:33:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 10:33:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 10:33:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2018-09-30 10:33:41,570 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2018-09-30 10:33:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:41,570 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2018-09-30 10:33:41,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:33:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2018-09-30 10:33:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 10:33:41,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:41,571 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1] [2018-09-30 10:33:41,572 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:41,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030187, now seen corresponding path program 49 times [2018-09-30 10:33:41,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:41,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:41,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:41,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:41,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:42,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:42,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:42,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 50 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:42,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:33:42,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:33:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:33:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:33:42,643 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 52 states. [2018-09-30 10:33:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:42,783 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2018-09-30 10:33:42,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:33:42,784 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-09-30 10:33:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:42,785 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:33:42,785 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 10:33:42,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:33:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 10:33:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 10:33:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 10:33:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-30 10:33:42,789 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-30 10:33:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:42,789 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-30 10:33:42,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:33:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-30 10:33:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 10:33:42,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:42,790 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1] [2018-09-30 10:33:42,791 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:42,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1212030125, now seen corresponding path program 32 times [2018-09-30 10:33:42,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:42,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:43,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:43,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:43,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:43,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:43,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:43,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:43,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:33:43,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:33:43,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:33:43,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:33:43,867 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 53 states. [2018-09-30 10:33:43,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:43,967 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2018-09-30 10:33:43,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:33:43,967 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 152 [2018-09-30 10:33:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:43,968 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:33:43,969 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 10:33:43,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:33:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 10:33:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 10:33:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 10:33:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-30 10:33:43,974 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2018-09-30 10:33:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:43,974 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-30 10:33:43,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:33:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-30 10:33:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 10:33:43,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:43,975 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1] [2018-09-30 10:33:43,976 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:43,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:43,976 INFO L82 PathProgramCache]: Analyzing trace with hash 200195593, now seen corresponding path program 50 times [2018-09-30 10:33:43,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:43,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:43,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:43,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:45,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:45,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:45,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:45,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:45,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 51 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:45,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:33:45,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:33:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:33:45,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:33:45,282 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 53 states. [2018-09-30 10:33:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:45,424 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2018-09-30 10:33:45,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:33:45,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-09-30 10:33:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:45,426 INFO L225 Difference]: With dead ends: 162 [2018-09-30 10:33:45,426 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 10:33:45,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:33:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 10:33:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 10:33:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 10:33:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2018-09-30 10:33:45,429 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 155 [2018-09-30 10:33:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:45,430 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2018-09-30 10:33:45,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:33:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2018-09-30 10:33:45,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 10:33:45,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:45,430 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1] [2018-09-30 10:33:45,431 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:45,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash 200195655, now seen corresponding path program 33 times [2018-09-30 10:33:45,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:45,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:45,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:45,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:46,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:46,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:46,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:46,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 10:33:46,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:46,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 0 proven. 3876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:46,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:46,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:33:46,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:33:46,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:33:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:33:46,621 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 54 states. [2018-09-30 10:33:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:46,790 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2018-09-30 10:33:46,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:33:46,791 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 155 [2018-09-30 10:33:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:46,792 INFO L225 Difference]: With dead ends: 164 [2018-09-30 10:33:46,792 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 10:33:46,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:33:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 10:33:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 10:33:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 10:33:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-30 10:33:46,796 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2018-09-30 10:33:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:46,796 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-30 10:33:46,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:33:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-30 10:33:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 10:33:46,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:46,797 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1] [2018-09-30 10:33:46,798 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:46,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:46,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1681224043, now seen corresponding path program 51 times [2018-09-30 10:33:46,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:46,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:46,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:46,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 52 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:47,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:47,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:47,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:47,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-30 10:33:47,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:47,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 10:33:50,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:33:50,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:33:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:33:50,269 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 107 states. [2018-09-30 10:33:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:55,549 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2018-09-30 10:33:55,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:33:55,550 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 158 [2018-09-30 10:33:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:55,551 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:33:55,552 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 10:33:55,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8059 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=14043, Invalid=30267, Unknown=0, NotChecked=0, Total=44310 [2018-09-30 10:33:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 10:33:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 10:33:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 10:33:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-30 10:33:55,557 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2018-09-30 10:33:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:55,558 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-30 10:33:55,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:33:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-30 10:33:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 10:33:55,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:55,559 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1] [2018-09-30 10:33:55,559 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:55,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387319, now seen corresponding path program 52 times [2018-09-30 10:33:55,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:55,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:55,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:55,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:56,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:56,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:56,679 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:56,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:56,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 53 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:56,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:33:56,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:33:56,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:33:56,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:33:56,740 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 55 states. [2018-09-30 10:33:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:56,893 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2018-09-30 10:33:56,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:33:56,893 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-09-30 10:33:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:56,894 INFO L225 Difference]: With dead ends: 168 [2018-09-30 10:33:56,894 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 10:33:56,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:33:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 10:33:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 10:33:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 10:33:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-30 10:33:56,897 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 161 [2018-09-30 10:33:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:56,898 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-30 10:33:56,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:33:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-30 10:33:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 10:33:56,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:56,899 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1] [2018-09-30 10:33:56,899 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:56,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:56,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1730387257, now seen corresponding path program 34 times [2018-09-30 10:33:56,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:56,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:56,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:56,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:57,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:57,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:58,026 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:58,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:58,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:58,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:33:58,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:33:58,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:33:58,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:33:58,077 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 56 states. [2018-09-30 10:33:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:58,241 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2018-09-30 10:33:58,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:33:58,241 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 161 [2018-09-30 10:33:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:58,242 INFO L225 Difference]: With dead ends: 170 [2018-09-30 10:33:58,243 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 10:33:58,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:33:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 10:33:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 10:33:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 10:33:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-30 10:33:58,248 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2018-09-30 10:33:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:58,249 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-30 10:33:58,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:33:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-30 10:33:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 10:33:58,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:58,250 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1] [2018-09-30 10:33:58,250 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:58,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694699, now seen corresponding path program 53 times [2018-09-30 10:33:58,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:58,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:58,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:58,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:59,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:59,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:59,460 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 10:33:59,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:59,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 54 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:59,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:33:59,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:33:59,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:33:59,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:33:59,511 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 56 states. [2018-09-30 10:33:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:59,598 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2018-09-30 10:33:59,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:33:59,599 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-09-30 10:33:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:59,600 INFO L225 Difference]: With dead ends: 171 [2018-09-30 10:33:59,600 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 10:33:59,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:33:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 10:33:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 10:33:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 10:33:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-30 10:33:59,605 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-30 10:33:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:59,605 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-30 10:33:59,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:33:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-30 10:33:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 10:33:59,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:59,607 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1] [2018-09-30 10:33:59,607 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:59,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1769694637, now seen corresponding path program 35 times [2018-09-30 10:33:59,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:59,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:59,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:59,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:01,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:01,189 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:01,287 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 10:34:01,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:01,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:01,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:34:01,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:34:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:34:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:34:01,339 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 57 states. [2018-09-30 10:34:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:01,499 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-30 10:34:01,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:34:01,500 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 164 [2018-09-30 10:34:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:01,501 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:34:01,501 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 10:34:01,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:34:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 10:34:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 10:34:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 10:34:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-30 10:34:01,504 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2018-09-30 10:34:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:01,505 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-30 10:34:01,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:34:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-30 10:34:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 10:34:01,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:01,506 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1] [2018-09-30 10:34:01,506 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:01,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:01,506 INFO L82 PathProgramCache]: Analyzing trace with hash -249780471, now seen corresponding path program 54 times [2018-09-30 10:34:01,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:01,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:01,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:01,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 55 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:02,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:02,722 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:02,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-30 10:34:02,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:02,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:05,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 10:34:05,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:34:05,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:34:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 10:34:05,361 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 113 states. [2018-09-30 10:34:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:11,233 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2018-09-30 10:34:11,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 10:34:11,233 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 167 [2018-09-30 10:34:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:11,234 INFO L225 Difference]: With dead ends: 176 [2018-09-30 10:34:11,234 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 10:34:11,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9019 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=15678, Invalid=33828, Unknown=0, NotChecked=0, Total=49506 [2018-09-30 10:34:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 10:34:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 10:34:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 10:34:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2018-09-30 10:34:11,240 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2018-09-30 10:34:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:11,240 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2018-09-30 10:34:11,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:34:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2018-09-30 10:34:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 10:34:11,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:11,241 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1] [2018-09-30 10:34:11,242 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:11,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751445, now seen corresponding path program 55 times [2018-09-30 10:34:11,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:11,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:11,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:11,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:12,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:12,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:12,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 56 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:12,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:12,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:34:12,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:34:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:34:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:34:12,584 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand 58 states. [2018-09-30 10:34:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:12,743 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2018-09-30 10:34:12,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:34:12,743 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-09-30 10:34:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:12,745 INFO L225 Difference]: With dead ends: 177 [2018-09-30 10:34:12,745 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 10:34:12,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:34:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 10:34:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 10:34:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 10:34:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-30 10:34:12,749 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-30 10:34:12,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:12,749 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-30 10:34:12,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:34:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-30 10:34:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 10:34:12,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:12,750 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1] [2018-09-30 10:34:12,750 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:12,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1969751507, now seen corresponding path program 36 times [2018-09-30 10:34:12,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:12,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:12,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:12,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:14,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:14,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:14,612 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2018-09-30 10:34:14,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:14,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:14,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:34:14,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:34:14,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:34:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:34:14,670 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 59 states. [2018-09-30 10:34:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:14,835 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2018-09-30 10:34:14,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:34:14,836 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 170 [2018-09-30 10:34:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:14,837 INFO L225 Difference]: With dead ends: 179 [2018-09-30 10:34:14,837 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 10:34:14,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:34:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 10:34:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 10:34:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 10:34:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 10:34:14,841 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-30 10:34:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:14,841 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 10:34:14,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:34:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 10:34:14,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 10:34:14,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:14,842 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1] [2018-09-30 10:34:14,842 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:14,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428215, now seen corresponding path program 56 times [2018-09-30 10:34:14,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:14,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:14,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:14,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:16,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:16,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:16,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:16,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:16,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 57 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:16,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:34:16,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:34:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:34:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:34:16,445 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 59 states. [2018-09-30 10:34:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:16,621 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2018-09-30 10:34:16,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:34:16,622 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-09-30 10:34:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:16,623 INFO L225 Difference]: With dead ends: 180 [2018-09-30 10:34:16,623 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 10:34:16,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:34:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 10:34:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 10:34:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 10:34:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-30 10:34:16,627 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 173 [2018-09-30 10:34:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:16,627 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-30 10:34:16,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:34:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-30 10:34:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 10:34:16,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:16,628 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1] [2018-09-30 10:34:16,629 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:16,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:16,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1271428153, now seen corresponding path program 37 times [2018-09-30 10:34:16,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:16,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:16,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:16,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:17,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:17,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:17,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:18,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:18,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:34:18,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:34:18,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:34:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:34:18,023 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 60 states. [2018-09-30 10:34:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:18,157 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2018-09-30 10:34:18,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:34:18,157 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 173 [2018-09-30 10:34:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:18,159 INFO L225 Difference]: With dead ends: 182 [2018-09-30 10:34:18,159 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 10:34:18,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:34:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 10:34:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-30 10:34:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 10:34:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-30 10:34:18,164 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2018-09-30 10:34:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:18,164 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-30 10:34:18,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:34:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-30 10:34:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 10:34:18,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:18,166 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1] [2018-09-30 10:34:18,166 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:18,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:18,166 INFO L82 PathProgramCache]: Analyzing trace with hash 200069397, now seen corresponding path program 57 times [2018-09-30 10:34:18,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:18,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:18,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:18,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 58 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:19,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:19,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:19,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-30 10:34:19,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:19,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:22,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 10:34:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 10:34:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 10:34:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 10:34:22,359 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 119 states. [2018-09-30 10:34:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:28,791 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2018-09-30 10:34:28,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 10:34:28,792 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 176 [2018-09-30 10:34:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:28,793 INFO L225 Difference]: With dead ends: 185 [2018-09-30 10:34:28,793 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 10:34:28,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=17403, Invalid=37587, Unknown=0, NotChecked=0, Total=54990 [2018-09-30 10:34:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 10:34:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 10:34:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:34:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-30 10:34:28,799 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2018-09-30 10:34:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:28,799 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-30 10:34:28,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 10:34:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-30 10:34:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 10:34:28,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:28,800 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1] [2018-09-30 10:34:28,800 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:28,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:28,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761783, now seen corresponding path program 58 times [2018-09-30 10:34:28,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:28,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:28,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:28,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:30,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:30,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:30,161 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:30,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:30,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 59 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:30,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:34:30,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:34:30,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:34:30,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:34:30,216 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 61 states. [2018-09-30 10:34:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:30,334 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2018-09-30 10:34:30,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:34:30,335 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-09-30 10:34:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:30,335 INFO L225 Difference]: With dead ends: 186 [2018-09-30 10:34:30,335 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 10:34:30,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:34:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 10:34:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-30 10:34:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 10:34:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-30 10:34:30,339 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 179 [2018-09-30 10:34:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:30,339 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-30 10:34:30,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:34:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-30 10:34:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 10:34:30,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:30,340 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1] [2018-09-30 10:34:30,340 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:30,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1145761721, now seen corresponding path program 38 times [2018-09-30 10:34:30,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:30,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:30,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:30,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:32,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:32,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:32,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:32,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:32,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:32,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:34:32,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:34:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:34:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:32,254 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 62 states. [2018-09-30 10:34:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:32,581 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2018-09-30 10:34:32,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:34:32,582 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 179 [2018-09-30 10:34:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:32,583 INFO L225 Difference]: With dead ends: 188 [2018-09-30 10:34:32,583 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 10:34:32,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 10:34:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-30 10:34:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 10:34:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2018-09-30 10:34:32,586 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2018-09-30 10:34:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:32,586 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2018-09-30 10:34:32,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:34:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2018-09-30 10:34:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 10:34:32,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:32,587 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1] [2018-09-30 10:34:32,587 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:32,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1282737003, now seen corresponding path program 59 times [2018-09-30 10:34:32,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:32,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:32,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:32,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:32,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:33,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:33,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:33,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:34,023 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 10:34:34,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:34,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 60 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:34,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:34,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:34:34,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:34:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:34:34,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:34,078 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand 62 states. [2018-09-30 10:34:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:34,197 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2018-09-30 10:34:34,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:34:34,198 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-09-30 10:34:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:34,199 INFO L225 Difference]: With dead ends: 189 [2018-09-30 10:34:34,199 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 10:34:34,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 10:34:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 10:34:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 10:34:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 10:34:34,203 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-30 10:34:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:34,204 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 10:34:34,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:34:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 10:34:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 10:34:34,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:34,205 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1] [2018-09-30 10:34:34,205 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:34,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:34,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736941, now seen corresponding path program 39 times [2018-09-30 10:34:34,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:34,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:34,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:34,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:35,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:35,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:35,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2018-09-30 10:34:35,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:35,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:35,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:35,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:34:35,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:34:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:34:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:34:35,840 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 63 states. [2018-09-30 10:34:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:36,044 INFO L93 Difference]: Finished difference Result 191 states and 197 transitions. [2018-09-30 10:34:36,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:34:36,045 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 182 [2018-09-30 10:34:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:36,046 INFO L225 Difference]: With dead ends: 191 [2018-09-30 10:34:36,046 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 10:34:36,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:34:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 10:34:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 10:34:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 10:34:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-30 10:34:36,051 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2018-09-30 10:34:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:36,051 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-30 10:34:36,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:34:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-30 10:34:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-30 10:34:36,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:36,052 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1] [2018-09-30 10:34:36,052 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:36,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1692584823, now seen corresponding path program 60 times [2018-09-30 10:34:36,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:36,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:36,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:36,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 61 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:37,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:37,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:37,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 10:34:37,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:37,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:40,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 10:34:40,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 10:34:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 10:34:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 10:34:40,525 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 125 states. [2018-09-30 10:34:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:47,778 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2018-09-30 10:34:47,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 10:34:47,779 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 185 [2018-09-30 10:34:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:47,780 INFO L225 Difference]: With dead ends: 194 [2018-09-30 10:34:47,780 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 10:34:47,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11101 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=19218, Invalid=41544, Unknown=0, NotChecked=0, Total=60762 [2018-09-30 10:34:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 10:34:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-30 10:34:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 10:34:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-30 10:34:47,786 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2018-09-30 10:34:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:47,786 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-30 10:34:47,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 10:34:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-30 10:34:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 10:34:47,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:47,787 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1] [2018-09-30 10:34:47,787 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:47,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash -876967915, now seen corresponding path program 61 times [2018-09-30 10:34:47,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:47,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:47,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:47,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:49,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:49,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:49,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:49,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 62 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:49,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:49,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:34:49,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:34:49,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:34:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:34:49,390 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 64 states. [2018-09-30 10:34:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:49,603 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2018-09-30 10:34:49,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:34:49,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-09-30 10:34:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:49,605 INFO L225 Difference]: With dead ends: 195 [2018-09-30 10:34:49,605 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 10:34:49,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:34:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 10:34:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 10:34:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 10:34:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-30 10:34:49,611 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-30 10:34:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:49,611 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-30 10:34:49,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:34:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-30 10:34:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 10:34:49,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:49,612 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1] [2018-09-30 10:34:49,613 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:49,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash -876967853, now seen corresponding path program 40 times [2018-09-30 10:34:49,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:49,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:49,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:49,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:51,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:51,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:51,296 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:51,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:51,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:51,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:34:51,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:34:51,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:34:51,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:34:51,355 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 65 states. [2018-09-30 10:34:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:51,588 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2018-09-30 10:34:51,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:34:51,588 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 188 [2018-09-30 10:34:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:51,590 INFO L225 Difference]: With dead ends: 197 [2018-09-30 10:34:51,590 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 10:34:51,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:34:51,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 10:34:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 10:34:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 10:34:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-30 10:34:51,595 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2018-09-30 10:34:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:51,595 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-30 10:34:51,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:34:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-30 10:34:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 10:34:51,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:51,596 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1] [2018-09-30 10:34:51,596 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:51,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 536344841, now seen corresponding path program 62 times [2018-09-30 10:34:51,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:51,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:51,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:51,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:53,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:53,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:53,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:53,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:53,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:53,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 63 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:53,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:53,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:34:53,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:34:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:34:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:34:53,246 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 65 states. [2018-09-30 10:34:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:53,417 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2018-09-30 10:34:53,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:34:53,417 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-09-30 10:34:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:53,418 INFO L225 Difference]: With dead ends: 198 [2018-09-30 10:34:53,418 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 10:34:53,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:34:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 10:34:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-30 10:34:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-30 10:34:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2018-09-30 10:34:53,422 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 191 [2018-09-30 10:34:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:53,422 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2018-09-30 10:34:53,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:34:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2018-09-30 10:34:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 10:34:53,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:53,423 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1] [2018-09-30 10:34:53,423 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:53,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash 536344903, now seen corresponding path program 41 times [2018-09-30 10:34:53,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:53,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:53,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:53,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:53,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:55,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:55,095 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:55,212 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 10:34:55,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:55,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:55,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:34:55,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:34:55,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:34:55,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:34:55,273 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2018-09-30 10:34:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:55,463 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2018-09-30 10:34:55,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:34:55,463 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 191 [2018-09-30 10:34:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:55,464 INFO L225 Difference]: With dead ends: 200 [2018-09-30 10:34:55,464 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 10:34:55,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:34:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 10:34:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 10:34:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 10:34:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-30 10:34:55,470 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2018-09-30 10:34:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:55,470 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-30 10:34:55,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:34:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-30 10:34:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 10:34:55,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:55,471 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1] [2018-09-30 10:34:55,472 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:55,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash 972256149, now seen corresponding path program 63 times [2018-09-30 10:34:55,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:55,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:55,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:55,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:55,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 64 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:57,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:57,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:57,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:57,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-30 10:34:57,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:57,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:00,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 10:35:00,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 10:35:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 10:35:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 10:35:00,418 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 131 states. [2018-09-30 10:35:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:08,447 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2018-09-30 10:35:08,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 10:35:08,447 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 194 [2018-09-30 10:35:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:08,448 INFO L225 Difference]: With dead ends: 203 [2018-09-30 10:35:08,448 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 10:35:08,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12223 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=21123, Invalid=45699, Unknown=0, NotChecked=0, Total=66822 [2018-09-30 10:35:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 10:35:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 10:35:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 10:35:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-30 10:35:08,454 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2018-09-30 10:35:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:08,454 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-30 10:35:08,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 10:35:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-30 10:35:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 10:35:08,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:08,455 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1] [2018-09-30 10:35:08,455 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:08,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash -775070327, now seen corresponding path program 64 times [2018-09-30 10:35:08,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:08,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:08,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:08,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:08,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:10,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:10,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:10,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:10,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:10,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:10,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 65 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:10,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:10,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:35:10,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:35:10,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:35:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:35:10,296 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 67 states. [2018-09-30 10:35:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:10,412 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2018-09-30 10:35:10,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:35:10,413 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-09-30 10:35:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:10,413 INFO L225 Difference]: With dead ends: 204 [2018-09-30 10:35:10,413 INFO L226 Difference]: Without dead ends: 200 [2018-09-30 10:35:10,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:35:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-30 10:35:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-30 10:35:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 10:35:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-30 10:35:10,418 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 197 [2018-09-30 10:35:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:10,419 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-30 10:35:10,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:35:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-30 10:35:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 10:35:10,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:10,420 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1] [2018-09-30 10:35:10,420 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:10,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash -775070265, now seen corresponding path program 42 times [2018-09-30 10:35:10,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:10,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:10,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:10,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:12,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:12,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:12,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-09-30 10:35:12,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:12,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:12,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:35:12,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:35:12,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:35:12,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:35:12,473 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2018-09-30 10:35:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:12,667 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2018-09-30 10:35:12,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:35:12,668 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 197 [2018-09-30 10:35:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:12,669 INFO L225 Difference]: With dead ends: 206 [2018-09-30 10:35:12,669 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 10:35:12,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:35:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 10:35:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-30 10:35:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 10:35:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2018-09-30 10:35:12,674 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2018-09-30 10:35:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:12,674 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2018-09-30 10:35:12,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:35:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2018-09-30 10:35:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 10:35:12,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:12,675 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1] [2018-09-30 10:35:12,675 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:12,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash -374489323, now seen corresponding path program 65 times [2018-09-30 10:35:12,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:12,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:12,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:12,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:12,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:14,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:14,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:14,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:14,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 10:35:14,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:14,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 66 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:14,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:14,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:35:14,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:35:14,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:35:14,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:35:14,584 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand 68 states. [2018-09-30 10:35:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:14,799 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2018-09-30 10:35:14,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:35:14,800 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-09-30 10:35:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:14,800 INFO L225 Difference]: With dead ends: 207 [2018-09-30 10:35:14,801 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 10:35:14,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:35:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 10:35:14,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 10:35:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 10:35:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-30 10:35:14,805 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-30 10:35:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:14,806 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-30 10:35:14,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:35:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-30 10:35:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 10:35:14,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:14,807 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1] [2018-09-30 10:35:14,807 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:14,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:14,807 INFO L82 PathProgramCache]: Analyzing trace with hash -374489261, now seen corresponding path program 43 times [2018-09-30 10:35:14,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:14,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:14,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:14,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:14,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:16,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:16,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:16,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:16,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:16,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:16,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:35:16,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:35:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:35:16,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:35:16,575 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 69 states. [2018-09-30 10:35:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:16,777 INFO L93 Difference]: Finished difference Result 209 states and 215 transitions. [2018-09-30 10:35:16,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:35:16,777 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 200 [2018-09-30 10:35:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:16,778 INFO L225 Difference]: With dead ends: 209 [2018-09-30 10:35:16,778 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 10:35:16,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:35:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 10:35:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 10:35:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 10:35:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-30 10:35:16,783 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2018-09-30 10:35:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:16,783 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-30 10:35:16,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:35:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-30 10:35:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 10:35:16,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:16,785 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1] [2018-09-30 10:35:16,785 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:16,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1915052553, now seen corresponding path program 66 times [2018-09-30 10:35:16,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:16,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:16,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:16,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:16,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 67 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:18,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:18,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:18,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:18,697 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-30 10:35:18,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:18,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:22,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:22,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 10:35:22,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 10:35:22,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 10:35:22,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 10:35:22,295 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 137 states. [2018-09-30 10:35:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:30,492 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2018-09-30 10:35:30,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 10:35:30,492 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 203 [2018-09-30 10:35:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:30,493 INFO L225 Difference]: With dead ends: 212 [2018-09-30 10:35:30,493 INFO L226 Difference]: Without dead ends: 208 [2018-09-30 10:35:30,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13399 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=23118, Invalid=50052, Unknown=0, NotChecked=0, Total=73170 [2018-09-30 10:35:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-30 10:35:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-30 10:35:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 10:35:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2018-09-30 10:35:30,499 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2018-09-30 10:35:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:30,499 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2018-09-30 10:35:30,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 10:35:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2018-09-30 10:35:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 10:35:30,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:30,501 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1] [2018-09-30 10:35:30,501 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:30,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:30,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452693, now seen corresponding path program 67 times [2018-09-30 10:35:30,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:30,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:30,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:30,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:30,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:32,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:32,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:32,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:32,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 68 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:32,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:32,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:35:32,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:35:32,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:35:32,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:35:32,655 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand 70 states. [2018-09-30 10:35:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:32,792 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2018-09-30 10:35:32,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:35:32,793 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-09-30 10:35:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:32,794 INFO L225 Difference]: With dead ends: 213 [2018-09-30 10:35:32,794 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 10:35:32,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:35:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 10:35:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 10:35:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 10:35:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-30 10:35:32,799 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-30 10:35:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:32,799 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-30 10:35:32,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:35:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-30 10:35:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 10:35:32,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:32,800 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1] [2018-09-30 10:35:32,800 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:32,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1281452755, now seen corresponding path program 44 times [2018-09-30 10:35:32,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:32,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:32,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:32,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:32,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:34,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:34,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:34,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:34,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:34,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:34,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:34,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:34,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:35:34,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:35:34,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:35:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:35:34,713 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 71 states. [2018-09-30 10:35:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:34,923 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2018-09-30 10:35:34,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:35:34,923 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 206 [2018-09-30 10:35:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:34,924 INFO L225 Difference]: With dead ends: 215 [2018-09-30 10:35:34,924 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 10:35:34,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:35:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 10:35:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 10:35:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 10:35:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-30 10:35:34,927 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2018-09-30 10:35:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:34,928 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-30 10:35:34,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:35:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-30 10:35:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 10:35:34,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:34,928 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1] [2018-09-30 10:35:34,929 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:34,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289353, now seen corresponding path program 68 times [2018-09-30 10:35:34,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:34,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:34,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:34,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:34,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:36,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:36,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:36,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:36,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:36,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:36,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 69 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:36,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:36,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:35:36,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:35:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:35:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:35:36,874 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 71 states. [2018-09-30 10:35:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:37,076 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2018-09-30 10:35:37,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:35:37,077 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-09-30 10:35:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:37,078 INFO L225 Difference]: With dead ends: 216 [2018-09-30 10:35:37,078 INFO L226 Difference]: Without dead ends: 212 [2018-09-30 10:35:37,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:35:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-30 10:35:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-30 10:35:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-30 10:35:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2018-09-30 10:35:37,082 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 209 [2018-09-30 10:35:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:37,082 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2018-09-30 10:35:37,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:35:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2018-09-30 10:35:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 10:35:37,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:37,083 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1] [2018-09-30 10:35:37,083 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:37,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2089289415, now seen corresponding path program 45 times [2018-09-30 10:35:37,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:37,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:37,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:37,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:37,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:39,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:39,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:39,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:39,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 10:35:39,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:39,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:39,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:39,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:35:39,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:35:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:35:39,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:35:39,384 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 72 states. [2018-09-30 10:35:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:39,626 INFO L93 Difference]: Finished difference Result 218 states and 224 transitions. [2018-09-30 10:35:39,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:35:39,627 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 209 [2018-09-30 10:35:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:39,627 INFO L225 Difference]: With dead ends: 218 [2018-09-30 10:35:39,628 INFO L226 Difference]: Without dead ends: 214 [2018-09-30 10:35:39,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:35:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-30 10:35:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-30 10:35:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-30 10:35:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2018-09-30 10:35:39,632 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2018-09-30 10:35:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:39,632 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2018-09-30 10:35:39,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:35:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2018-09-30 10:35:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 10:35:39,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:39,633 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1] [2018-09-30 10:35:39,633 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:39,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash -645499371, now seen corresponding path program 69 times [2018-09-30 10:35:39,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:39,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:39,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:39,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:39,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 70 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:41,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:41,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:41,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:41,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-30 10:35:41,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:41,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-30 10:35:43,841 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 10:35:44,042 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:35:44,042 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:35:44,048 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:35:44,048 INFO L202 PluginConnector]: Adding new model HiddenEqualityWithBranches.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:35:44 BoogieIcfgContainer [2018-09-30 10:35:44,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:35:44,049 INFO L168 Benchmark]: Toolchain (without parser) took 235064.59 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 165.7 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 448.9 MB). Peak memory consumption was 614.5 MB. Max. memory is 7.1 GB. [2018-09-30 10:35:44,050 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:35:44,051 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:35:44,051 INFO L168 Benchmark]: Boogie Preprocessor took 23.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:35:44,051 INFO L168 Benchmark]: RCFGBuilder took 328.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:35:44,052 INFO L168 Benchmark]: TraceAbstraction took 234657.86 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 165.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 427.7 MB). Peak memory consumption was 593.4 MB. Max. memory is 7.1 GB. [2018-09-30 10:35:44,053 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.41 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 23.35 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 328.04 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 234657.86 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 165.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 427.7 MB). Peak memory consumption was 593.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 213 with TraceHistMax 70, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 234.5s OverallTime, 116 OverallIterations, 70 TraceHistogramMax, 90.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 667 SDtfs, 2487 SDslu, 11223 SDs, 0 SdLazy, 12781 SolverSat, 1111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17913 GetRequests, 11381 SyntacticMatches, 0 SemanticMatches, 6532 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108474 ImplicationChecksByTransitivity, 191.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 115 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 126.6s InterpolantComputationTime, 24537 NumberOfCodeBlocks, 24537 NumberOfCodeBlocksAsserted, 2247 NumberOfCheckSat, 24309 ConstructedInterpolants, 0 QuantifiedInterpolants, 10237847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29108 ConjunctsInSsa, 4195 ConjunctsInUnsatCore, 228 InterpolantComputations, 2 PerfectInterpolantSequences, 4013/558041 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/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-35-44-062.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEqualityWithBranches.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-35-44-062.csv Completed graceful shutdown